JP6966518B2 - Adapter and charge control method - Google Patents

Description

The present invention relates to the field of charging technology, and more specifically to an adapter and a charging control method.

The adapter, also called a power adapter, is used to charge a device to be charged (eg, a terminal). Currently, commercially available adapters generally charge a device to be charged (eg, a terminal) at a constant voltage, but the current drawn by the device to be charged (eg, a terminal) is the maximum output current threshold that the adapter can provide. When it exceeds, it may cause the adapter to enter the overload protection state, and it may not be possible to continue charging the device to be charged (for example, the terminal).

Embodiments of the present invention provide adapters and charge control methods to improve the safety of the charging process.

In the first aspect, the adapter is a power conversion unit configured to obtain the output voltage and output current of the adapter by converting the input AC (AC), and the input end is the power conversion. A voltage feedback unit connected to the unit and configured to generate a voltage feedback signal indicating whether or not the output voltage of the adapter has reached a predetermined target voltage by detecting the output voltage of the adapter. The input end is connected to the power conversion unit, and by detecting the output current of the adapter, it is configured to generate a current feedback signal indicating whether or not the output current of the adapter has reached a predetermined target current. The current feedback unit and the input end are connected to the output end of the voltage feedback unit and the output end of the current feedback unit, and the output end is connected to the power conversion unit to receive the voltage feedback signal and the current feedback signal. If the voltage feedback signal indicates that the output voltage of the adapter has reached the target current, or if the current feedback signal indicates that the output current of the adapter has reached the target current, the adapter An adapter that includes a power regulating unit configured to stabilize output voltage and output current, and a charging interface, wherein the adapter performs bidirectional communication with the charged device via the data line of the charging interface. offer.

In the second aspect, the charge control method used for the adapter is to obtain the output voltage and output current of the adapter by converting the input AC (AC), and to obtain the output voltage of the adapter. By detecting, a voltage feedback signal indicating whether or not the output voltage of the adapter has reached a predetermined target voltage is generated, and by detecting the output current of the adapter, the output current of the adapter is predetermined. When the current feedback signal indicating whether or not the target current of the above is reached and the voltage feedback signal indicates that the output voltage of the adapter has reached the target voltage, or the current feedback signal is the adapter. When it indicates that the output current of the above has reached the target current, the output voltage and the output current of the adapter are stabilized, and bidirectional communication is performed with the charged device via the data line of the charging interface. , Including charge control methods.

The adapter according to the embodiment of the present invention includes both a voltage feedback unit and a current feedback unit. Among them, the voltage feedback unit, the power adjustment unit, and the power conversion unit form a hardware circuit for controlling the output voltage of the adapter in a closed loop, that is, a hardware type voltage feedback loop. On the other hand, the current feedback unit, the power adjustment unit, and the power conversion unit form a hardware circuit for controlling the output current of the adapter in a closed loop, that is, a hardware type current feedback loop. The power adjustment unit according to the embodiment of the present invention considers the feedback information provided by the voltage feedback signal and the current feedback signal based on the double loop feedback control, and is out of the output voltage of the adapter and the output current of the adapter. When either one reaches the target value, the output voltage and output current of the adapter are stabilized. In other words, in the embodiment of the present invention, when either the output voltage or the output current of the adapter reaches the target value, the power adjustment unit immediately senses this result and responds immediately. It stabilizes the output voltage and output current of the adapter and improves the safety of the charging process.

Hereinafter, in order to more clearly explain the technical proposal according to the embodiment of the present invention, the drawings necessary for the description of the embodiment of the present invention will be briefly introduced. The drawings in the description below are only a few embodiments of the invention, and it will be apparent to those skilled in the art that these drawings may conceive other drawings without creative effort.

FIG. 1A is a schematic structural diagram of a second adapter according to an embodiment of the present invention. FIG. 1B is a schematic structural diagram of a power conversion unit according to an embodiment of the present invention. FIG. 2 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 3 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 4 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 5 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 6 is a schematic structural diagram of the second adapter according to another embodiment of the present invention. FIG. 7 is a schematic structural diagram of the second adapter according to another embodiment of the present invention. FIG. 8 is a schematic structural diagram of the second adapter according to another embodiment of the present invention. FIG. 9 is a schematic structural diagram of the voltage comparison unit according to the embodiment of the present invention. FIG. 10 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 11 is a schematic structural diagram of the second adapter according to another embodiment of the present invention. FIG. 12 is a schematic structural diagram of the second adapter according to another embodiment of the present invention. FIG. 13 is a schematic structural diagram of the second adapter according to another embodiment of the present invention. FIG. 14 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 15 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 16 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 17 is a schematic structural diagram of the current comparison unit according to the embodiment of the present invention. FIG. 18 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 19A is a schematic view showing a connection method between the second adapter and the charged device according to the embodiment of the present invention. FIG. 19B is a schematic diagram of a quick charge communication process according to an embodiment of the present invention. FIG. 20 is a schematic diagram of a pulsating direct current current waveform. FIG. 21 is a schematic structural diagram of a second adapter according to another embodiment of the present invention. FIG. 22 is a schematic diagram of pulsating direct current in the constant current mode according to the embodiment of the present invention. FIG. 23 is a circuit diagram of the second adapter according to the embodiment of the present invention. FIG. 24 is a flow chart of a charge control method according to an embodiment of the present invention.

Hereinafter, the technical proposal in the embodiment of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiment of the present invention. It is clear that the embodiments described are only partial embodiments of the present invention and not all embodiments. All other embodiments obtained on the basis of embodiments of the invention, provided that no one skilled in the art makes creative efforts, should be included in the scope of protection of the invention.

In a related technique, a first adapter for operating in a constant voltage mode to charge a device to be charged (eg, a terminal) has been mentioned. In the first adapter, the voltage output in the constant voltage mode basically maintains a constant voltage such as 5V, 9V, 12V or 20V.

The voltage output from the first adapter is not applied directly to both ends of the battery, but is converted by a conversion circuit in the charged device (for example, the terminal) to cause the charged device (for example, the terminal). Obtain the desired charging voltage and / or charging current of the battery.

The conversion circuit is configured to meet the desired charging voltage and / or charging current requirements of the battery by converting the voltage output from the first adapter.

As an example, the conversion circuit may refer to a charge management module for managing the charge voltage and / or charge current of the battery in the process of charging the battery, for example, an integrated circuit for charging (IC). The conversion circuit realizes the management of the charging voltage and / or the charging current of the battery by having the function of the voltage feedback module and / or the function of the current feedback module.

For example, the battery charging process may include one or more of a trickle charging step, a constant current charging step and a constant voltage charging step. In the trickle charge stage, the conversion circuit can ensure that the current entering the battery during the trickle charge stage meets the desired charge current of the battery (eg, first charge current) by means of a current feedback loop. In the constant current charging stage, the conversion circuit uses a current feedback loop to allow the current entering the battery in the constant current charging stage to be the desired charging current of the battery (eg, a second charging current that may be greater than the first charging current). Can be met. In the constant voltage charging stage, the conversion circuit can ensure that the voltage applied across the battery in the constant voltage charging stage satisfies the desired charging voltage of the battery by means of a voltage feedback loop.

As an example, when the voltage output from the first adapter is larger than the desired charging voltage of the battery, the conversion circuit performs a step-down process on the voltage output from the first adapter to charge the battery obtained after the step-down conversion. The voltage may be configured to meet the desired charging voltage requirements of the battery. As another example, when the voltage output from the first adapter is smaller than the desired charging voltage of the battery, the conversion circuit is obtained after the boost conversion by performing a step-up process on the voltage output from the first adapter. The charging voltage is configured to meet the desired charging voltage requirements of the battery.

As another example, for example, when the first adapter outputs a constant voltage of 5V, the conversion circuit is used when the battery is a single cell (for example, a lithium battery cell has a single cell charge termination voltage of 4.2V). (For example, the Buck step-down circuit) can perform a step-down process on the voltage output from the first adapter so that the charging voltage obtained after the step-down process satisfies the desired charging voltage requirement of the battery.

As another example, for example, when the first adapter outputs a constant voltage of 5 V, a battery in which two or more single cells are connected in series by the first adapter (using a lithium battery cell as an example, the charge termination voltage of the single cell). Is 4.2V), the conversion circuit (for example, Boost booster circuit) performs boosting processing on the voltage output from the first adapter, and the charging voltage obtained after boosting is the battery. Can be made to meet the desired charging voltage requirements of.

The conversion circuit loses the electrical energy of the unconverted part in the form of heat because it is limited to the low efficiency of circuit conversion. Such an amount of heat is concentrated inside the device to be charged (for example, a terminal). The design space and heat dissipation space of the device to be charged (for example, the terminal) are small (for example, the mobile terminal used by the user has a smaller physical size and becomes thinner, and a large amount of electronics for improving the performance of the mobile terminal. Since the parts are densely arranged in the mobile terminal), it not only increases the design difficulty of the conversion circuit, but also makes it difficult to quickly release the amount of heat concentrated in the device to be charged (for example, the terminal), which in turn makes it difficult to design the conversion circuit. There is a risk that the charging device (for example, the terminal) will malfunction.

For example, the amount of heat concentrated in the conversion circuit may cause thermal interference to the electronic components near the conversion circuit, which may cause abnormal operation of the electronic components. As another example, the amount of heat concentrated in the conversion circuit may shorten the service life of the conversion circuit and its nearby electronic components. As another example, the amount of heat concentrated in the conversion circuit may cause thermal interference in the battery, which in turn may cause abnormal charging / discharging of the battery. As yet another example, the amount of heat concentrated in the conversion circuit may raise the temperature of the device to be charged (eg, the terminal) and affect the user's experience of charging. As yet another example, the amount of heat concentrated in the conversion circuit may cause a short circuit in the conversion circuit itself, so the voltage output from the first adapter is applied directly to both ends of the battery, causing abnormal charging. Furthermore, if the battery is in a state of being charged with an overvoltage for a long period of time, it may explode, which poses a safety problem.

Embodiments of the present invention provide a second adapter with adjustable output voltage. The second adapter can acquire battery status information. The battery status information may include the current electricity quantity information and / or voltage information of the battery. The second adapter can satisfy the desired charging voltage and / or charging current requirement of the battery by adjusting the output voltage of the second adapter itself based on the acquired battery status information. Further, in the constant current charging step in the battery charging process, the output voltage adjusted by the second adapter is directly applied to both ends of the battery to charge the battery.

The second adapter may have a voltage feedback module function and a current feedback module function in order to realize management for the charging voltage and / or charging current of the battery.

The second adapter adjusts the output voltage of the second adapter itself according to the acquired battery status information. The second adapter acquires the battery status information in real time, and the battery status information acquired each time. It can be pointed out that the output voltage of the second adapter itself is adjusted based on the above to satisfy the desired charging voltage and / or charging current of the battery.

When the second adapter adjusts the output voltage of the second adapter itself based on the battery status information acquired in real time, the second adapter charges the battery as the battery voltage continuously rises in the charging process. By acquiring the current state information of the battery at different time points and adjusting the output voltage of the second adapter itself in real time based on the current state information of the battery, the desired charging voltage and / or charging current requirement of the battery is satisfied. Can point to that.

For example, the battery charging process may include one or more of a trickle charging step, a constant current charging step and a constant voltage charging step. In the trickle charge stage, the second adapter can use a current feedback loop to ensure that the current output from the second adapter and into the battery during the trickle charge stage meets the battery's desired charge current requirements (eg,). 1st charging current). In the constant current charging stage, the second adapter can allow the current output from the second adapter and into the battery in the constant current charging stage to meet the desired charging current requirement of the battery by means of a current feedback loop. For example, a second charging current that can be a charging current greater than the first charging current). Further, in the constant current charging stage, the second adapter can charge the battery by directly applying the output charging voltage to both ends of the battery. In the constant voltage charging stage, the second adapter can allow the voltage output from the second adapter in the constant voltage charging stage to meet the desired charging voltage requirement of the battery by means of a voltage feedback loop.

In the trickle charging step and the constant voltage charging step, the voltage output from the second adapter is converted by a processing method similar to that of the first adapter, that is, by a conversion circuit in the device to be charged (for example, a terminal). Obtain the desired charging voltage and / or charging current of the battery in the device to be charged (eg, terminal).

Optionally, in one embodiment, the current feedback loop of the second adapter can be implemented by software based on the voltage feedback loop. Specifically, if the charging current output from the second adapter does not meet the requirement, the second adapter calculates the desired charging voltage based on the desired charging current and from the second adapter by a voltage feedback loop. The output charging voltage can be adjusted to the calculated desired charging voltage, that is, the software can realize the function of the current feedback loop by the voltage feedback loop. However, in the process of charging the battery in the constant voltage mode, the load current in the charging circuit always changes rapidly, so that the second adapter uses software to realize a current feedback loop, which is an intermediate between current sampling and current-voltage conversion. This requires operation, slows the response of the second adapter to the load current, and the current drawn by the device to be charged (eg, the terminal) can exceed the maximum output current threshold that the second adapter can provide. , It may cause the second adapter to enter the overload protection state, and it may not be possible to continue charging the charged device (for example, the terminal).

In order to improve the response speed of the second adapter to the load current, a voltage feedback loop in the form of hardware and a current feedback loop in the form of hardware may be provided inside the second adapter. Hereinafter, a detailed description will be given with reference to FIG. 1A.

FIG. 1A is a schematic structural diagram of a second adapter according to an embodiment of the present invention. The second adapter 10 in FIG. 1A may include a power conversion unit 11, a voltage feedback unit 12, a current feedback unit 13, and a power adjustment unit 14.

The power conversion unit 11 is configured to obtain the output voltage and output current of the second adapter 10 by converting the input alternating current.

The voltage feedback unit 12 indicates whether or not the output voltage of the second adapter 10 has reached a predetermined target voltage by connecting the input end to the power conversion unit 11 and detecting the output voltage of the second adapter 10. It is configured to generate a voltage feedback signal.

The current feedback unit 13 indicates whether or not the output current of the second adapter 10 has reached a predetermined target current by connecting the input end to the power conversion unit 11 and detecting the output current of the second adapter 10. It is configured to generate a current feedback signal.

In the power adjustment unit 14, the input end is connected to the output end of the voltage feedback unit 12 and the output end of the current feedback unit 13, the output end is connected to the power conversion unit 11, and the voltage feedback signal and the current feedback signal are received. If the voltage feedback signal indicates that the output voltage of the second adapter 10 has reached the target voltage, or if the current feedback signal indicates that the output current of the second adapter 10 has reached the target current, the second adapter 10 It is configured to stabilize the output voltage and output current.

Stabilizing the output voltage and output current of the second adapter 10 by the power adjusting unit 14 may mean controlling the power adjusting unit 14 to keep the output voltage and output current of the second adapter 10 constant. Taking the power adjustment unit 14, which is a power adjustment unit for pulse width modulation (PWM), as an example, when the frequency and duty ratio of the PWM control signal are kept constant, the output voltage and output current of the second adapter 10 are set. Can be held stable.

The second adapter according to the embodiment of the present invention includes both a voltage feedback unit and a current feedback unit. Here, the voltage feedback unit, the power adjustment unit, and the power conversion unit form a hardware circuit for controlling the output voltage of the second adapter in a closed loop, that is, a hardware type voltage feedback loop. The current feedback unit, the power adjustment unit, and the power conversion unit form a hardware circuit for controlling the output current of the second adapter in a closed loop, that is, a hardware-type current feedback loop. Based on the dual loop feedback control, the power adjustment unit according to the embodiment of the present invention considers the feedback information provided by the voltage feedback signal and the current feedback signal, and considers the output voltage of the second adapter and the output of the second adapter. When either one of the currents reaches the target value, the output voltage and output current of the second adapter are stabilized. In other words, in the embodiment of the present invention, when either the output voltage or the output current of the second adapter reaches the target value, the power adjustment unit immediately senses this situation and responds immediately. It stabilizes the output voltage and output current of the second adapter and improves the safety of the charging process.

Taking the constant voltage mode as an example, the voltage feedback loop mainly plays a role of adjusting the output voltage of the second adapter to the voltage corresponding to the constant voltage mode, while the current feedback loop has the output current of the second adapter as the target current ( The target current at this time can be the maximum output current allowed in the constant voltage mode), and when the output current of the second adapter reaches the target current, the power adjustment unit feeds back the current. The loop can immediately detect this situation and play a role in immediately stabilizing the output current of the second adapter and preventing its further increase. Similarly, in the constant current mode, the current feedback loop serves to adjust the output current of the second adapter to the current corresponding to the constant current mode, while in the voltage feedback loop, the output voltage of the second adapter is the target voltage ( The target voltage at this time can be the maximum output voltage allowed in the constant current mode), and when the output voltage reaches the target voltage, the power adjustment unit uses a voltage feedback loop to check this situation. Can play a role of immediately sensing and immediately stabilizing the output voltage of the second adapter to prevent further increase.

The voltage feedback signal and the current feedback signal do not limit the signal types of the voltage feedback signal and the current feedback signal, and refer to different feedback targets. Specifically, the voltage feedback signal is for feeding back the output voltage of the second adapter, and the current feedback signal may be for feeding back the output current of the second adapter, but the voltage feedback signal and the current feedback are used. Any signal may be a voltage signal.

The target voltage may be a predetermined fixed value or an adjustable variable. In some embodiments, the second adapter 10 can adjust the voltage value of the target voltage by a specific adjustment circuit according to the actual needs. For example, the charged device (terminal) transmits a target voltage adjustment instruction to the second adapter, and the second adapter 10 can adjust the voltage value of the target voltage by the target voltage adjustment instruction. As another example, the second adapter 10 can receive the battery status information from the device to be charged and adjust the voltage value of the target voltage in real time according to the battery status. Similarly, the target current may be a predetermined fixed value or an adjustable variable. In some embodiments, the second adapter 10 can adjust the voltage value of the target current through a particular adjustment circuit, depending on the actual needs. For example, the charged device (terminal) transmits a target current adjustment instruction to the second adapter 10, and the second adapter 10 can adjust the voltage value of the target current by the target current adjustment instruction. As another example, the second adapter 10 can receive the battery status information from the device to be charged and adjust the current value of the target current in real time according to the battery status.

The charged device used in the embodiment of the present invention may be a "communication terminal" (or abbreviated as "terminal"), and may be a wired line connection (for example, a public switched telephone network (PSTN)). ), Digital subscriber line (DSL), digital cable, direct connection cable, and / or another data connection / network and / or wireless interface (eg, cellular network, wireless local area). Wireless local area network (WLAN), digital television networks such as digital video broadcasting handheld (DVB-H) networks, satellite networks, amplitude modulation-frequency modulation, AM- It includes, but is not limited to, devices configured to receive / transmit communication signals via FM) broadcast transmitters and / or wireless interfaces to other communication terminals). A communication terminal configured to communicate via a wireless interface may also be referred to as a "wireless communication terminal", a "wireless terminal" and / or a "mobile terminal". Examples of mobile terminals include satellite or cellular telephones, personal communication system (PCS) terminals with built-in cellular wireless telephones, data processing, fax and data communication functions, wireless telephones, pagers, etc. Personal digital assistants (PDAs) with Internet / intranet access, web browsers, organizers, calendars and / or global positioning system (GPS) receivers, and regular laptops and / or It includes, but is not limited to, palmtop receivers or other electronic devices with wireless telephone communication devices (transceivers).

In some embodiments, the second adapter 10 includes a control unit (see MCU in FIG. 23) configured to control the charging process in order to improve the intelligence of the second adapter 10. But it may be. Specifically, the control unit performs bidirectional communication with the charged device (for example, the terminal) to provide instructions or state information (the state information is the battery of the charged device) of the charged device (for example, the terminal). Acquires state information such as the current voltage and / or the temperature of the device to be charged), and the device to be charged (eg, terminal) of the second adapter 10 based on the instruction or state signal of the device to be charged (eg, terminal). , Terminal) is configured to control the charging process. In some embodiments, the control unit may be a Microcontroller Unit (MCU), but embodiments of the invention are not limited to this and may be other types of chips or circuits. good.

In some embodiments, the second adapter 10 may include a charging interface (see charging interface 191 in FIG. 19A), but in embodiments of the present invention, the type of charging interface is not particularly limited, eg. , Universal Serial Bus (USB) interface may be used, and the USB interface may be a standard USB interface, a micro USB interface, or a Type-C interface. ..

The charging mode or function of the second adapter 10 correlates with the choice of target voltage and target current. The values of the target voltage and the target current also differ depending on the different charging modes or functions of the second adapter 10. Hereinafter, the constant voltage mode and the constant current mode will be described in detail as examples.

Optionally, in some embodiments, the second adapter 10 operates in a first charging mode, which is a constant voltage mode (ie, the second adapter 10 operates in a first charging mode and is a charged device (eg, a terminal). ) Can be charged). In the constant voltage mode, the target voltage of the second adapter 10 is the voltage corresponding to the constant voltage mode. The target current is the maximum output current allowed by the second adapter 10 in the constant voltage mode. Specifically, the power adjustment unit 14 adjusts the output voltage of the second adapter 10 to a voltage corresponding to the constant voltage mode based on the voltage feedback signal, the current feedback signal is the output current of the second adapter 10, and the output current is the second adapter. When indicating that the maximum output current allowed in the constant voltage mode of 10 has been reached, the output current of the second adapter 10 is controlled so as not to exceed the maximum output current allowed in the constant voltage mode of the second adapter 10. It is configured as follows.

In the constant voltage mode, the output voltage of the second adapter 10 is adjusted to a certain fixed voltage value, and the voltage corresponding to the above-mentioned constant voltage mode is the fixed voltage value. For example, in the constant voltage mode, when the output voltage of the second adapter 10 is 5V, the voltage corresponding to the constant voltage mode is 5V.

In an embodiment of the invention, the target voltage is set to a voltage corresponding to the constant voltage mode, and the target current is set to the maximum output current allowed by the second adapter in the constant voltage mode. In this way, the second adapter quickly adjusts the output voltage of the second adapter to the voltage corresponding to the constant voltage mode based on the voltage feedback loop, and charges the charged device (for example, the terminal) with a constant voltage. It can be performed. In the constant voltage charging process, when the output current of the second adapter (that is, the load current) reaches the maximum allowable output current of the second adapter, the second adapter immediately senses this situation by the current feedback loop and immediately. In addition, it is possible to prevent the output current of the second adapter from further increasing, prevent the occurrence of charging failure, and improve the response capability of the second adapter to the load current.

For example, in the constant voltage mode, when the fixed voltage value corresponding to the constant voltage mode is 5V, the output current of the second adapter is generally maintained between 100mA and 200mA. In this case, the target voltage may be set to a fixed voltage value (eg, 5V) and the target current may be set to 500mA or 1A. When the output current of the second adapter increases to the current value corresponding to the target current, the power adjustment unit 14 immediately senses this situation by the current feedback loop and prevents the output current of the second adapter from further increasing. ..

As shown in FIG. 1B, based on the above-described embodiment, the power conversion unit 11 may include a primary rectifying unit 15, a transformer 16, a secondary rectifying unit 17, and a secondary filter unit 18. The primary rectifying unit 15 directly outputs the voltage of the pulsating waveform to the transformer 16.

In the prior art, the power conversion unit includes a rectifying unit and a filter unit located on the primary side and a rectifying unit and a filter unit located on the secondary side. The rectifying unit and the filter unit located on the primary side may also be referred to as a primary rectifying unit and a primary filter unit. The rectifying unit and the filter unit located on the secondary side may also be referred to as a secondary rectifying unit and a secondary filter unit. The primary filter unit generally uses a liquid aluminum electrolytic capacitor for filtering, but the relatively large volume of the liquid aluminum electrolytic capacitor results in an increase in the volume of the adapter.

In the embodiment of the present invention, the power conversion unit 11 includes a primary rectifying unit 15, a transformer 16, a secondary rectifying unit 17, and a secondary filter unit 18, and the primary rectifying unit 15 measures the voltage of the pulsating waveform. Output directly to the transformer 16. In other words, since the power conversion unit 11 according to the embodiment of the present invention does not include the primary filter unit, the volume of the second adapter 10 can be significantly reduced, and the second adapter 10 can be carried more conveniently. .. The secondary filter unit 18 filters mainly on the basis of solid aluminum electrolytic capacitors. After removing the primary filter unit from the power conversion unit 11, the load capacity of the solid aluminum electrolytic capacitor is limited, but due to the existence of a hardware type current feedback loop, it is possible to respond immediately to changes in the load current. It is possible to prevent a charging failure due to an excessive output current of the second adapter.

In the above solution with the primary filter unit removed, the maximum output current allowed in the constant voltage mode of the second adapter 10 can be determined based on the capacitor capacity in the secondary filter unit. For example, if it is determined that the maximum load current that the secondary filter unit can withstand is 500 mA or 1 A based on the capacitor capacity of the secondary filter unit, the target current can be set to 500 mA or 1 A to set the second adapter. It is possible to prevent a charging failure due to the output current exceeding the target current.

Optionally, in some embodiments, the second adapter 10 operates in a second charging mode, which is a constant current mode (ie, the second adapter 10 operates in a second charging mode and is a charged device (eg, a terminal). ) Can be charged). In the constant current mode, the target voltage is the maximum output voltage allowed by the second adapter 10 in the constant current mode, and the target current is the current corresponding to the constant current mode. Specifically, the power adjustment unit 14 adjusts the output current of the second adapter 10 to the current corresponding to the constant current mode based on the current feedback signal, the voltage feedback signal is the output voltage of the second adapter 10, and the output voltage is the second adapter. When indicating that the maximum output voltage allowed in the constant current mode of 10 has been reached, the output voltage of the second adapter 10 is controlled so as not to exceed the maximum output voltage allowed in the constant current mode of the second adapter 10. It is configured as follows.

In the embodiment of the present invention, the target current is set to the current corresponding to the constant current mode, and the target voltage is set to the maximum output voltage allowed by the second adapter in the constant current mode. In this way, the second adapter can charge the device to be charged (for example, the terminal) by adjusting the output current of the second adapter to the current corresponding to the constant current mode based on the current feedback loop. During the charging process, when the output voltage of the 2nd adapter reaches the maximum allowable output voltage of the 2nd adapter, the 2nd adapter immediately senses this situation by the voltage feedback loop and immediately receives the output voltage of the 2nd adapter. Further increase can be prevented, and the occurrence of charging failure can be prevented.

Optionally, as shown in FIG. 2, the second adapter 10 may further include a first adjustment unit 21 based on any of the embodiments described above. The first adjusting unit 21 is connected to the voltage feedback unit 12 and is configured to adjust the value of the target voltage.

In the embodiment of the present invention, a first adjustment unit capable of adjusting the output voltage of the second adapter according to actual needs is introduced, and the degree of intelligence of the second adapter is improved. For example, the second adapter 10 can operate in the first charging mode or the second charging mode, and the first adjusting unit 21 is in the currently used first charging mode or the second charging mode of the second adapter 10. The target voltage value can be adjusted accordingly.

Optionally, based on the embodiment of FIG. 2, the voltage feedback unit 12 may include a voltage sampling unit 31 and a voltage comparison unit 32, as shown in FIG. The voltage sampling unit 31 is configured such that the input end is connected to the power conversion unit 11 and the output voltage of the second adapter 10 is sampled to obtain the first voltage. In the voltage comparison unit 32, the input end is connected to the output end of the voltage sampling unit 31, the first voltage and the first reference voltage are compared, and the voltage is based on the comparison result between the first voltage and the first reference voltage. It is configured to generate a feedback signal. The first adjustment unit 21 is connected to the voltage comparison unit 32, supplies the first reference voltage to the voltage comparison unit 32, and realizes the purpose of adjusting the value of the target voltage by adjusting the value of the first reference voltage. be able to.

The first voltage in the embodiment of the present invention corresponds to the output voltage of the second adapter or is configured to indicate the magnitude of the current output voltage of the second adapter. Further, the first reference voltage in the embodiment of the present invention corresponds to the target voltage or is configured to indicate the magnitude of the target voltage.

In some embodiments, if the first voltage is less than the first reference voltage, the voltage comparison unit produces a first voltage feedback signal indicating that the output voltage of the second adapter does not reach the target voltage. When one voltage is equal to the first reference voltage, the voltage comparison unit produces a second voltage feedback signal indicating that the output voltage of the second adapter has reached the target voltage.

In the embodiment of the present invention, the specific embodiment of the voltage sampling unit 31 is not particularly limited. For example, the voltage sampling unit 31 may be wiring, in which case the first voltage is the output voltage of the second adapter. The first reference voltage is the target voltage. As another example, the voltage sampling unit 31 may include two series connected resistors operating as voltage dividers, in which case the first voltage is the voltage obtained by dividing by the two resistors. The value of the first reference voltage may be associated with the voltage divider ratio of the two resistors. Taking the case where the target voltage is 5V as an example, when the output voltage of the second adapter reaches 5V, the first voltage is 0.5V after being divided by the series connection of the two resistors, and the first voltage is the first. The reference voltage can be set to 0.5V.

The first adjustment unit 21 in the embodiment of FIG. 3 can adjust the first reference voltage in various forms. Hereinafter, a detailed description will be given with reference to FIGS. 4 to 6.

Optionally, in some embodiments, the first tuning unit 21 may include a control unit 41 and a first digital-to-analog converter (DAC) 42, as shown in FIG. The input end of the first DAC 42 is connected to the control unit 41, and the output end of the first DAC 42 is connected to the voltage comparison unit 32. The control unit 41 achieves the purpose of adjusting the value of the first reference voltage through the first DAC 42.

Specifically, the control unit 41 may be an MCU that can be connected to the first DAC 42 via the DAC port. The MCU outputs a digital signal via the DAC port, and converts the digital signal into an analog signal which is a voltage value of the first reference voltage by the first DAC 42. The DAC has the characteristics of high signal conversion speed and high accuracy, and by adjusting the reference voltage by the DAC, the adjustment speed and control accuracy of the reference voltage by the second adapter can be improved.

Optionally, in some embodiments, the first adjustment unit 21 may include a control unit 51 and an RC filter unit 52, as shown in FIG. The RC filter unit 52 has an input end connected to the control unit 51 and an output end connected to the voltage comparison unit 32. The control unit 51 is configured to adjust the value of the first reference voltage by generating a PWM signal and adjusting the duty ratio of the PWM signal.

Specifically, the control unit 51 may be an MCU capable of outputting a PWM signal via the PWM port. After the PWM signal is filtered by the RC filter circuit 52, a stable analog amount, that is, a first reference voltage can be formed. Since the RC filter circuit 52 has the characteristics of being easy to carry out and having a low cost, it is possible to realize the adjustment of the first reference voltage at a relatively low cost.

Optionally, in some embodiments, the first tuning unit 21 may include a control unit 61 and a digital potentiometer 62, as shown in FIG. The digital potentiometer 62 has a control end connected to the control unit 61 and an output end connected to the voltage comparison unit 32. The control unit 61 adjusts the value of the first reference voltage by adjusting the voltage division ratio of the digital potentiometer 62.

Specifically, the control unit 61 may be an MCU, and the MCU can be connected to the control end of the digital potentiometer 62 via an integrated circuit (I2C eye square sea) interface. It is configured to adjust the voltage division ratio of the digital potentiometer 62. In the digital potentiometer 62, the high potential end is VDD, that is, the power supply end, the low potential end is grounded, the output end (also called the adjustment output end) is connected to the voltage comparison unit 32, and the voltage comparison unit 32 is the first reference. It is configured to output a voltage. The digital potentiometer is easy to implement, low in cost, and can realize the adjustment of the first reference voltage at a relatively low cost.

Optionally, based on the embodiment of FIG. 2, the voltage feedback unit 12 may include a voltage divider unit 71 and a voltage comparison unit 72, as shown in FIG. The voltage dividing unit 71 is configured such that the input end is connected to the power conversion unit 11 and the output voltage of the second adapter 10 is divided based on a predetermined voltage dividing ratio to generate a first voltage. In the voltage comparison unit 72, the input end is connected to the output end of the voltage dividing unit 71, the first voltage and the first reference voltage are compared, and the voltage is based on the comparison result between the first voltage and the first reference voltage. It is configured to generate a feedback signal. The first adjusting unit 21 is connected to the voltage dividing unit 71 and adjusts the voltage value of the target voltage by adjusting the voltage dividing ratio of the voltage dividing unit 71.

The difference between the embodiment of FIG. 7 and the embodiment of FIGS. 3 to 6 is that the embodiment of FIGS. 3 to 6 mainly adjusts the voltage value of the target voltage by adjusting the reference voltage of the voltage comparison unit. However, the embodiment of FIG. 7 is to realize the adjustment of the voltage value of the target voltage by adjusting the voltage dividing ratio of the voltage dividing unit 71. In other words, in the embodiment of FIG. 7, if the first reference voltage _{can be set to a fixed value V REF} and the output voltage of the second adapter is desired to be 5V, the output voltage of the second adapter is 5V. At this time, the voltage dividing ratio of the voltage dividing unit 71 can be adjusted so that the voltage at the output end of the voltage _{dividing unit 71 becomes equal to V REF.} Similarly, if it is desired that the output voltage of the second adapter be 3V, the voltage at the output end of the voltage dividing unit 71 becomes equal _{to V REF when the output voltage of the second adapter is 3V.} The voltage division ratio of the pressure unit 71 can be adjusted.

In the embodiment of the present invention, the voltage dividing unit realizes sampling of the output voltage of the second adapter and adjustment of the voltage value of the target voltage, and simplifies the circuit structure of the second adapter.

The voltage dividing unit 71 according to the embodiment of the present invention can be implemented in various forms, and for example, the function of adjusting the voltage dividing and the voltage dividing ratio can be realized by an element such as a digital potentiometer, a discrete resistor, or a switch. can.

As shown in FIG. 8, the voltage dividing unit 71 may include the digital potentiometer 81 as an example of the embodiment of the digital potentiometer. The first adjustment unit 21 may include a control unit 82. In the digital potentiometer 81, the high potential end is connected to the power conversion unit 11, the low potential end is grounded, and the output end is connected to the input end of the voltage comparison unit 72. The control unit 82 is connected to the control end of the digital potentiometer 81 and is configured to adjust the voltage division ratio of the digital potentiometer 81.

The voltage comparison unit 72 described above can be implemented in various forms. In some embodiments, the voltage comparison unit 72 may include a first operational amplifier, as shown in FIG. The first operational amplifier includes a reverse-phase input end that receives a first voltage, an in-phase input end that receives a first reference voltage, and an output end that generates a voltage feedback signal. The first operational amplifier may also be referred to as a first error amplifier or a voltage error amplifier.

Optionally, as shown in FIG. 10, the second adapter 10 is connected to the current feedback unit 13 and configured to adjust the current value of the target current, based on any of the embodiments described above. 2 The adjustment unit 101 may be further included.

In the embodiment of the present invention, a second adjusting unit capable of adjusting the output current of the second adapter according to actual needs is introduced, and the degree of intelligence of the second adapter is improved. For example, the second adapter 10 can operate in the first charging mode or the second charging mode, and the second adjusting unit 101 is in the currently used first charging mode or the second charging mode of the second adapter 10. Based on this, the current value of the target current is adjusted.

Optionally, in some embodiments, based on the embodiment of FIG. 10, the current feedback unit 13 may include a current sampling unit 111 and a current comparison unit 112, as shown in FIG. The current sampling unit 111 is configured such that the input end is connected to the power conversion unit 11 and the output current of the second adapter 10 is sampled to obtain a second voltage indicating the magnitude of the output current of the second adapter 10. ing. In the current comparison unit 112, the input end is connected to the output end of the current sampling unit 111, the second voltage and the second reference voltage are compared, and the current is based on the comparison result between the second voltage and the second reference voltage. It is configured to generate a feedback signal. The second adjusting unit 101 is connected to the current comparison unit 112, supplies the second reference voltage to the current comparison unit 112, and adjusts the current value of the target current by adjusting the voltage value of the second reference voltage.

The second voltage according to the embodiment of the present invention corresponds to the output current of the second adapter or indicates the magnitude of the output current of the second adapter. Further, the second reference voltage according to the embodiment of the present invention corresponds to the target current or indicates the magnitude of the target current.

Specifically, when the second voltage is smaller than the second reference voltage, the current comparison unit produces a first current feedback signal indicating that the output current of the second adapter does not reach the target current, while the second voltage is. When equal to the second reference voltage, the current comparison unit produces a second current feedback signal indicating that the output current of the second adapter has reached the target current.

The current sampling unit 111 can acquire the second voltage as follows. Specifically, the current sampling unit 111 first samples the output current of the second adapter, obtains the sampling current, and then converts it into the corresponding sampling voltage based on the magnitude of the sampling current (sampling voltage value). = Sampling current value x sampling resistance). In some embodiments, the sampling voltage can be directly the second voltage. In another embodiment, the voltage after dividing the sampling voltage by a plurality of resistors can be used as the second voltage. Specifically, the current sampling function in the current sampling unit 111 can be realized by a galvanometer.

The second adjustment unit in the embodiment of FIG. 11 can adjust the second reference voltage in various ways. Hereinafter, a detailed description will be given with reference to FIGS. 12 to 14.

Optionally, in some embodiments, the second adjustment unit 101 may include a control unit 121 and a second DAC 122, as shown in FIG. The second DAC 122 has an input end connected to the control unit 121 and an output end connected to the current comparison unit 112. The control unit 121 adjusts the voltage value of the second reference voltage through the second DAC 122.

Specifically, the control unit 121 may be an MCU that can be connected to the second DAC 122 via the DAC port. The MCU outputs a digital signal via the DAC port, and converts the digital signal into an analog signal by the second DAC 122. The analog signal is the voltage value of the first reference voltage. The DAC has the characteristics of high signal conversion speed and high accuracy, and by adjusting the reference voltage by the DAC, the adjustment speed and control accuracy of the reference voltage by the second adapter can be improved.

Optionally, in some embodiments, the second adjustment unit 101 may include a control unit 131 and an RC filter unit 132, as shown in FIG. The RC filter unit 132 has an input end connected to the control unit 131 and an output end connected to the current comparison unit 112. The control unit 131 is configured to adjust the voltage value of the second reference voltage by generating a PWM signal and adjusting the duty ratio of the PWM signal.

Specifically, the control unit 131 may be an MCU capable of outputting a PWM signal via the PWM port. After the PWM signal is filtered by the RC filter circuit 132, a stable analog amount, that is, a second reference voltage can be formed. Since the RC filter circuit 132 has the characteristics of being easy to carry out and having a low cost, it is possible to realize the adjustment of the second reference voltage at a relatively low cost.

Optionally, in some embodiments, the second conditioning unit 101 may include a control unit 141 and a digital potentiometer 142, as shown in FIG. The digital potentiometer 142 has a control end connected to the control unit 141 and an output end connected to the current comparison unit 112. The control unit 141 adjusts the voltage value of the second reference voltage by adjusting the voltage division ratio of the digital potentiometer 142.

In some embodiments, the control unit 141 may be an MCU. The MCU is configured to adjust the voltage division ratio of the digital potentiometer 142, which can be connected to the control end of the digital potentiometer 142 via the I2C interface. In the digital potentiometer 142, the high potential end is VDD, that is, the power supply end, the low potential end is grounded, the output end (also called the adjusted output end) is connected to the voltage comparison unit 112, and the current comparison unit 112 is the second reference. It is configured to output a voltage. The digital potentiometer is easy to implement, low in cost, and can realize the adjustment of the second reference voltage at a relatively low cost.

Optionally, in some embodiments, based on the embodiment of FIG. 10, the current feedback unit 13 may include a current sampling unit 151, a voltage dividing unit 152 and a current comparison unit 153, as shown in FIG. .. The current sampling unit 151 is configured such that the input end is connected to the power conversion unit 11 and the output current of the second adapter 10 is sampled to obtain a third voltage indicating the magnitude of the output current of the second adapter 10. ing. The voltage dividing unit 152 is configured so that the input end is connected to the output end of the current sampling unit 151 and the third voltage is divided based on a predetermined voltage dividing ratio to generate the second voltage. In the current comparison unit 153, the input end is connected to the output end of the voltage dividing unit 152, the second voltage and the second reference voltage are compared, and the current is based on the comparison result between the second voltage and the second reference voltage. It is configured to generate a feedback signal. The second adjusting unit 101 is connected to the voltage dividing unit 152, and adjusts the current value of the target current by adjusting the voltage dividing ratio of the voltage dividing unit 152.

The difference between the embodiment of FIGS. 15 and 11 to 14 is that the embodiment of FIGS. 11 to 14 mainly adjusts the current value of the target current by adjusting the reference voltage of the current comparison unit. However, the embodiment of FIG. 15 is to realize the adjustment of the current value of the target current by adjusting the voltage dividing ratio of the voltage dividing unit 152. In other words, in the embodiment of FIG. 15, if the second reference voltage _{can be set to a fixed value V REF} and the output current of the second adapter is desired to be 300 mV, the output current of the second adapter is 300 mV. At this time, the voltage dividing ratio of the voltage dividing unit 152 can be adjusted so that the voltage at the output end of the voltage _{dividing unit 152 becomes equal to V REF.} Similarly, if the output current of the second adapter is desired to be 500 mV, then the voltage at the output end of the voltage divider unit 152 is equal _{to V REF when the output current of the second adapter is 500 mV.} The voltage division ratio of the pressure unit 152 can be adjusted.

The voltage dividing unit 152 according to the embodiment of the present invention can be implemented in various forms, and for example, the function of adjusting the voltage dividing and the voltage dividing ratio can be realized by an element such as a digital potentiometer, a discrete resistor, or a switch. can.

As an example of the embodiment of the digital potentiometer, as shown in FIG. 16, the voltage dividing unit 152 includes the digital potentiometer 161 and the second adjusting unit 101 includes the control unit 162. The high potential end of the digital potentiometer 161 is connected to the output end of the current sampling unit 151, the low potential end is grounded, and the output end is connected to the input end of the current comparison unit 153. The control unit 162 is connected to the control end of the digital potentiometer 161 and is configured to adjust the voltage division ratio of the digital potentiometer 161.

The control unit described above may be one control unit or a plurality of control units. In some embodiments, the control units in the first adjustment unit and the second adjustment unit described above are the same control unit.

The above-mentioned current comparison unit 153 can be implemented in various forms. In some embodiments, as shown in FIG. 17, the current comparison unit 153 may include a second operational amplifier. The second operational amplifier includes a reverse-phase input end that receives a second voltage, an in-phase input end that receives a second reference voltage, and an output end that generates a current feedback signal. The second operational amplifier may also be referred to as a second error amplifier or a current error amplifier.

As described above, with reference to FIGS. 1 to 17, the embodiment of the voltage feedback unit 12 and the current feedback unit 13 and the adjustment mode of the target voltage corresponding to the voltage feedback unit 12 and the target current corresponding to the current feedback unit 13 are described in detail. explained. Hereinafter, embodiments of the power adjustment unit 14 will be described in detail with reference to FIG.

Optionally, in some embodiments, the voltage feedback unit 12 is a first operational amplifier (not shown in FIG. 18) having an output end configured to output a voltage feedback signal. Specifically, see FIG. 9) may be included. The current feedback unit 13 may include a second operational amplifier (not shown in FIG. 18, see specifically FIG. 17) having an output end configured to output a current feedback signal. The power adjustment unit 14 may include a first diode D1, a second diode D2, a photoelectric coupling unit 181 and a PWM control unit 182. The output end of the first operational amplifier of the voltage feedback unit 12 (see FIG. 9, the output end of the first operational amplifier is configured to output a voltage feedback signal) is connected to the cathode of the first diode D1. Has been done. The anode of the first diode D1 is connected to the input end of the photoelectric coupling unit 181. The output end of the second operational amplifier of the current feedback unit 13 (see FIG. 17, the output end of the second operational amplifier is configured to output a current feedback signal) is connected to the cathode of the second diode D2. Has been done. The anode of the second diode D2 is connected to the input end of the photoelectric coupling unit 181. The output end of the photoelectric coupling unit 181 is connected to the input end of the PWM control unit 182. The output end of the PWM control unit 182 is connected to the power conversion unit 11.

The first operational amplifier in the present specification may refer to the same operational amplifier. Similarly, the second operational amplifier in the present specification may refer to the same operational amplifier.

Specifically, in the present embodiment, the voltage signal output from the first operational amplifier is a voltage feedback signal, and the voltage signal output from the second operational amplifier is a current feedback signal. When the voltage signal output from the first operational amplifier is 0, it indicates that the output voltage of the second adapter has reached the target voltage, while when the voltage signal of the second operational amplifier output is 0, it means that the second adapter has reached the target voltage. 2 Indicates that the output current of the adapter has reached the target current. The first diode D1 and the second diode D2 are two diodes connected in antiparallel. When the voltage signal output from either the first operational amplifier or the second operational amplifier is 0, the voltage at the feedback point in FIG. 18 is about 0 (a constant voltage difference is required to conduct the diode). Therefore, the actual voltage at the feedback point is a value slightly greater than 0, for example 0.7V). In this case, the photoelectric coupling unit 181 operates in a stable state and outputs a stable voltage signal to the PWM control unit 182. After that, the PWM control unit 182 generates a PWM control signal having a constant duty ratio, and the power conversion unit 11 stabilizes the output voltage and output current of the second adapter. In other words, when either the output voltage or the output current of the second adapter reaches the target value, the first diode D1 and the second diode D2 connected in antiparallel immediately sense this situation. Further, the output voltage and output current of the second adapter are stabilized.

Optionally, in some embodiments, the second adapter 10 is operable in a first charging mode and a second charging mode, with a charging speed for a device to be charged (eg, a terminal) in the second charging mode. 1 It is faster than the charging speed for the device to be charged (for example, the terminal) in the charging mode. In other words, the second adapter 10 operating in the second charging mode fully charges the battery in the charged device (eg, terminal) of the same capacity as compared to the second adapter 10 operating in the first charging mode. The time required for this is shortened.

The second adapter 10 includes a control unit. In the process in which the second adapter 10 is connected to the device to be charged (for example, a terminal), the control unit controls the charging process in the second charging mode by performing bidirectional communication with the device to be charged (for example, a terminal). do. The control unit may be the control unit in any of the above-described embodiments, for example, the control unit in the first adjustment unit, or the control unit in the second adjustment unit.

The first charging mode may be a normal charging mode and the second charging mode may be a quick charging mode. The above-mentioned normal charging mode means that a relatively small current value (generally less than 2.5A) is output from the second adapter, or a charged device (for example, less than 15W) is used with a relatively small power (generally less than 15W). , Terminal) refers to charging the battery. In the normal charging mode, trying to fully charge a large capacity battery (for example, a battery having a capacity of 3000 mAh) generally requires several hours. On the other hand, in the fast charge mode, the second adapter outputs a relatively large current (generally over 2.5A, eg 4.5A, 5A and above) or a relatively large amount of power (generally). , 15 W or more) to charge the battery in the device to be charged (for example, a terminal). Compared to the normal charging mode, the second adapter can significantly reduce the charging time required to fully charge the battery of the same capacity in the quick charging mode and increase the charging speed.

In the embodiment of the present invention, the communication content between the control unit of the second adapter and the charged device (for example, the terminal) and the mode in which the control unit controls the output of the second adapter in the second charging mode are not particularly limited. For example, the control unit communicates with the charged device (eg, terminal), exchanges the current voltage or current amount of electricity of the battery in the charged device (eg, terminal), and the current voltage or current of the battery. The output voltage or output current of the second adapter can be adjusted based on the amount of electricity. Hereinafter, with reference to a specific embodiment, the communication content between the control unit and the charged device (for example, a terminal) and the mode in which the control unit controls the output of the second adapter in the second charging mode will be described. explain in detail.

Optionally, in some embodiments, the control unit controls the output of the second adapter in the second charging mode by bidirectionally communicating with the device to be charged (eg, a terminal). However, it may include negotiating a charging mode between the second adapter and the charged device (eg, the terminal) by performing bidirectional communication with the charged device (eg, the terminal).

In the embodiment of the present invention, the second adapter does not indiscriminately quickly charge the charged device (for example, the terminal) in the second charging mode, but performs bidirectional communication with the charged device (for example, the terminal). By negotiating whether or not the second adapter can quickly charge the device to be charged (for example, the terminal) in the second charging mode, the safety of the charging process can be improved.

Specifically, it is controlled that the control unit negotiates the charging mode between the second adapter and the charged device (for example, the terminal) by performing bidirectional communication with the charged device (for example, the terminal). The unit transmits the first instruction to the charged device (for example, the terminal), and the control unit receives the response instruction to the first instruction transmitted from the charged device (for example, the terminal). If the device to be charged (eg, the terminal) agrees to enable the second charging mode, the control unit may include charging the device to be charged (eg, the terminal) in the second charging mode. .. Here, the first instruction is configured to inquire whether or not the charged device (for example, a terminal) enables the second charging mode, and the response instruction is the charged device (for example, a terminal). Is configured to indicate whether or not they agree to enable the second charging mode.

The above description in the embodiment of the present invention does not limit the master-slave relationship between the second adapter (or the control unit of the second adapter) and the charged device (for example, the terminal). In other words, one of the control unit and the charged device (eg, a terminal) may initiate a bidirectional communication session as a master device, whereas the other is a slave device (slave). As device), the first response or the first response can be made for the communication started by the master device. As a possible embodiment, the role of the master device and slave device can be ascertained by comparing the level on the second adapter side with respect to ground and the level on the charged device (eg, terminal) side with respect to ground in the communication process. ..

In the embodiment of the present invention, the specific embodiment of the two-way communication between the second adapter (or the control unit of the second adapter) and the charged device (for example, the terminal) is not limited. That is, one of the second adapter (or the control unit of the second adapter) and the charged device (for example, a terminal) starts a communication session as a master device, while the other is a slave device. When the first response or the first response is made to the communication session started by the master device, and the master device makes the second response to the first response or the first reply by the slave device, the master device and the master device are made. One cycle of the charge mode negotiation process with the slave device is considered complete. In a possible embodiment, after the multi-cycle charge mode negotiation between the master device and the slave device is completed, the charging operation between the master device and the slave device is performed, so that the execution safety of the charging process after the negotiation is performed. Ensuring sex and reliability.

As one form in which the master device can make a second response in response to the slave device's first response or first response to the communication session, the master device has the slave device's first response or first response to the communication session. Is received, and the first response of the received slave device or the second response corresponding to the first response can be performed. By way of example, when the master device receives the first response or the first response of the slave device to the communication session within a predetermined time, the second response corresponding to the first response or the first response of the slave device. Is done as follows. Specifically, after one cycle of charge mode negotiation is completed, the master device and the slave device execute a charging operation in the first charging mode or the second charging mode depending on the negotiation result, that is, the second adapter negotiates. Depending on the result, the device to be charged (for example, a terminal) is charged by operating in the first charging mode or the second charging mode.

As another form in which the master device can make a first response to the communication session or a second response in response to the first response, the master device can make a second response to the communication session within a predetermined time. Even if one response or the first response is not received, the second response corresponding to the first response or the first response of the slave device is performed. By way of example, the master device corresponds to the first response or the first response of the slave device without receiving the first response or the first response of the slave device to the communication session within a predetermined time. The response is as follows. Specifically, the master device and the slave device execute a charging operation in the first charging mode after one cycle of charging mode negotiation is completed, that is, the second adapter is the charged device in the first charging mode (for example,). , Terminal) to charge.

Optionally, in some embodiments, a charged device (eg, a terminal) initiates a communication session as a master device and a second adapter (or control unit of the second adapter) is initiated by the master device as a slave device. After making the first response or the first response to the communication session, the charged device (for example, the terminal) does not make the first response of the second adapter or the second response corresponding to the first response. It is considered that one cycle of the charge mode negotiation process is completed between the second adapter (or the control unit of the second adapter) and the charged device (for example, the terminal). Further, the second adapter can charge the charged device (for example, the terminal) in the first charging mode or the second charging mode depending on the negotiation result.

Optionally, in some embodiments, the control unit controls the output of the second adapter in the second charging mode by bidirectional communication with a charged device (eg, a terminal). By performing bidirectional communication with the device to be charged (for example, the terminal), the charging voltage for charging the device to be charged (for example, the terminal) output from the second adapter in the second charging mode is determined. , The control unit sets the voltage value of the target voltage so that the voltage value of the target voltage becomes equal to the charging voltage for charging the device to be charged (for example, the terminal) output from the second adapter in the second charging mode. It may include adjusting.

Specifically, the control unit performs bidirectional communication with the charged device (for example, the terminal) to charge the charged device (for example, the terminal) output from the second adapter in the second charging mode. Determining the voltage means that the control unit sends a second instruction to the charged device (eg, the terminal) and the control unit responds to the second instruction sent from the charged device (eg, the terminal). It may include receiving instructions. Here, the second instruction is configured to inquire whether the output voltage of the second adapter matches the current voltage of the battery of the charged device (for example, the terminal), and is a response instruction of the second instruction. Is configured to indicate whether the output voltage of the second adapter matches the current voltage of the battery or is higher or lower than the current voltage of the battery. Alternatively, is the second instruction appropriate as the charging voltage for the current output voltage of the second adapter to charge the device to be charged (eg, the terminal) output from the second adapter in the second charging mode? It can be configured to inquire whether or not. The response instruction of the second instruction may be configured to indicate whether the output voltage of the second adapter is appropriate, high or low. The current output voltage of the second adapter matches the current voltage of the battery, or the current output voltage of the second adapter is the device to be charged (eg, terminal) output from the second adapter in the second charging mode. Suitable as a charging voltage for charging is that the current output voltage of the second adapter is slightly higher than the current voltage of the battery and the difference between the output voltage of the second adapter and the current voltage of the battery. Can indicate that is within a predetermined range (generally several hundred mV).

Optionally, in some embodiments, the control unit controls the output of the second adapter in the second charging mode by bidirectionally communicating with the device to be charged (eg, a terminal). Determines the charging current for charging the charged device (for example, the terminal) output from the second adapter in the second charging mode by performing bidirectional communication with the charged device (for example, the terminal). Then, the control unit measures the current value of the target current so that the current value of the target current becomes equal to the charging current for charging the device to be charged (for example, the terminal) output from the second adapter in the second charging mode. May include adjusting.

Specifically, the control unit performs bidirectional communication with the device to be charged (for example, a terminal) to charge the device to be charged (for example, a terminal) output from the second adapter in the second charging mode. Determining the current means that the control unit sends a third instruction to the device to be charged (eg, the terminal) and that the control unit responds to the third instruction sent from the device to be charged (eg, the terminal). Receiving instructions and the device being charged (eg, the device being charged) output by the control unit from the second adapter in the second charging mode based on the maximum charging current currently supported by the device being charged (eg, the terminal). It may include determining the charging current for charging the terminal). Here, the third instruction is configured to query the maximum charging current currently supported by the device to be charged (eg, the terminal), and the response instruction of the third instruction is the device to be charged (eg, the terminal). It is configured to indicate the maximum charging current currently supported by. It should be noted that the control unit is a charged device (eg, for example) output from the second adapter in the second charging mode based on the maximum charging current currently supported by the charged device (eg, the terminal) in various forms. The charging current for charging the terminal) can be determined. For example, the second adapter charges the charged device (eg, terminal) output from the second adapter in the second charging mode with the maximum charging current currently supported by the charged device (eg, terminal). It may be determined as the charging current of the second charging mode, taking into account factors such as the maximum charging current currently supported by the device to be charged (eg, the terminal) and its own current output capability. The charging current for charging the device to be charged (for example, the terminal) output from the adapter may be determined.

Optionally, in some embodiments, the control unit controls the output of the second adapter in the second charging mode by bidirectionally communicating with the device to be charged (eg, a terminal). In the process of charging the charged device (for example, the terminal) by the adapter in the second charging mode, the control unit performs bidirectional communication with the charged device (for example, the terminal), so that the second adapter can be charged in the second charging mode. It may include adjusting the output current.

Specifically, the control unit adjusts the output current of the second adapter by performing bidirectional communication with the charged device (for example, the terminal), so that the control unit can contact the charged device (for example, the terminal). 4 The instruction is transmitted, the control unit receives the response instruction of the 4th instruction transmitted from the 2nd adapter, and the control unit sets the output current of the 2nd adapter according to the current voltage of the battery. It may include adjusting. Here, the fourth instruction is configured to query the current voltage of the battery to be charged (eg, the terminal), and the response instruction of the fourth instruction is configured to indicate the current voltage of the battery. There is.

Optionally, in some embodiments, the second adapter 10 includes a charging interface 191 as shown in FIG. 19A. Further, in some embodiments, the control unit in the second adapter 10 (MCU in FIG. 23) performs bidirectional communication with the charged device (eg, a terminal) via the data line 192 in the charging interface 191. be able to.

Optionally, in some embodiments, the control unit controls the output of the second adapter in the second charging mode by bidirectionally communicating with the device to be charged (eg, a terminal). , It may include determining whether or not a contact failure has occurred in the charging interface by performing bidirectional communication with the device to be charged (for example, a terminal).

Specifically, the control unit determines whether or not a contact failure has occurred in the charging interface by bidirectionally communicating with the charged device (for example, a terminal). The fourth instruction is transmitted to the terminal), the control unit receives the response instruction of the fourth instruction transmitted from the charged device (for example, the terminal), and the control unit receives the output voltage of the second adapter. And may include determining whether or not a poor contact has occurred in the charging interface based on the current voltage of the device to be charged (eg, the terminal). Here, the fourth instruction is configured to inquire about the current voltage of the battery to be charged (eg, terminal), and the response instruction of the fourth instruction is the current current voltage of the battery to be charged (eg, terminal). It is configured to indicate the voltage. For example, if the control unit determines that the voltage difference between the output voltage of the second adapter and the current voltage of the device to be charged (for example, the terminal) is higher than a predetermined voltage threshold, the voltage difference is output from the second adapter. It means that the impedance divided by the current current value is larger than the predetermined impedance threshold value, that is, it can be determined that a contact failure has occurred in the charging interface.

Optionally, in some embodiments, poor contact in the charging interface can be determined by a device to be charged (eg, a terminal). Specifically, the determination is that the charged device (for example, the terminal) transmits the sixth instruction to the control unit and the charged device (for example, the terminal) is the response instruction of the sixth instruction transmitted from the control unit. And whether the device to be charged (eg, the terminal) has a poor contact with the charging interface based on the current voltage of the battery of the device to be charged (eg, the terminal) and the output voltage of the second adapter. Includes determining. Here, the sixth instruction is configured to inquire about the output voltage of the second adapter, and the response instruction of the sixth instruction is configured to indicate the output voltage of the second adapter. After the device to be charged (eg, the terminal) determines that the charging interface has a poor contact, the device to be charged (eg, the terminal) sends a fifth instruction to the control unit indicating that the charging interface has a poor contact. do. After receiving the fifth instruction, the control unit controls the second adapter so that the second adapter terminates the second charging mode.

Hereinafter, the communication process between the control unit and the charged device (for example, the terminal) in the second adapter will be described in more detail with reference to FIG. 19B. It should be noted that the example of FIG. 19B is merely for those skilled in the art to understand the embodiments of the present invention and is not limited to specific numerical values or specific scenarios illustrating the embodiments of the present invention. It should be. It is clear that various equivalent modifications or modifications made by those skilled in the art based on the illustrations shown in FIG. 19B fall within the scope of the embodiments of the present invention.

As shown in FIG. 19B, the process of charging the device to be charged (for example, a terminal) by the output of the second adapter in the second charging mode, that is, the charging process may include the following five steps.

<Stage 1>
After being connected to the power supply device, the charged device (for example, a terminal) can detect the type of the power supply device by the data lines D +, D−. When the power supply device detects that it is a second adapter, the current drawn by the charged device (eg, the terminal) may be greater than a predetermined current threshold I2 (eg, 1A). When the control unit in the second adapter detects that the output current of the second adapter is I2 or more in a predetermined period (for example, it may be continuous time T1), the control unit is charged with a device (for example, a terminal). ) Has completed the identification of the type of power supply device, initiates a negotiation process between the second adapter and the charged device (eg, terminal), and instructs 1 (eg, terminal) to the charged device (eg, terminal). By transmitting (corresponding to the first instruction), it is inquired whether or not the charged device (for example, the terminal) agrees to charge the charged device (for example, the terminal) in the two charging modes by the second adapter.

The control unit receives the response instruction of the instruction 1 transmitted from the charged device (for example, the terminal), and the response instruction of the instruction 1 is the second charging mode in which the charged device (for example, the terminal) uses the second adapter. If it indicates that it disagrees with the charging of the device to be charged (for example, the terminal) in, the control unit rediscovers the output current of the second adapter. If the output current of the second adapter is still greater than or equal to I2 within a predetermined continuous period (eg, it may be continuous time T1), the control unit retransmits instruction 1 to the device to be charged (eg, terminal). Inquires whether the charged device (for example, the terminal) agrees to charge the charged device (for example, the terminal) in the second charging mode by the second adapter. In the control unit, the charged device (for example, the terminal) agrees to charge the charged device (for example, the terminal) in the second charging mode by the second adapter, or the output current of the second adapter is I2 or more. Repeat the above steps in step 1 until the requirements are not met.

If the charged device (eg, the terminal) agrees that the second adapter charges the charged device (eg, the terminal) in the second charging mode, the communication process proceeds to the second stage.

<Stage 2>
The output voltage of the second adapter may include multiple levels. The control unit transmits instruction 2 (corresponding to the second instruction) to the device to be charged (for example, the terminal), so that the output voltage (current output voltage) of the second adapter is changed to the device to be charged (for example, the terminal). ) Ask if it matches the current voltage of the battery.

The charged device (eg, terminal) sends the response instruction of instruction 2 to the control unit so that the output voltage of the second adapter matches the current voltage of the charged device (eg, terminal) battery, or Indicates whether the battery is higher or lower than the current voltage. Response to Instruction 2 When the instruction indicates that the output voltage of the 2nd adapter is high or low, the control unit adjusts the output voltage of the 2nd adapter by one level and reissues the instruction 2 to the device to be charged (for example, the terminal). It transmits and again inquires whether the output voltage of the second adapter matches the current voltage of the charged device (eg terminal) battery. The charged device (for example, the terminal) repeats the above steps of step 2 until it is determined that the output voltage of the second adapter matches the current voltage of the battery of the charged device (for example, the terminal), and when it is determined to match. , Move to the third stage.

<Stage 3>
The control unit transmits instruction 3 (corresponding to the third instruction) to the device to be charged (eg, the terminal) and inquires about the maximum charging current currently supported by the device to be charged (eg, the terminal). The charged device (eg, terminal) indicates the maximum charging current currently supported by the charged device (eg, terminal) by transmitting the response instruction of instruction 3 to the control unit, and proceeds to the fourth stage. do.

<Stage 4>
The control unit is for charging the charged device (eg, terminal) output from the second adapter in the second charging mode according to the maximum charging current currently supported by the charged device (eg, terminal). After determining the charging current, the process proceeds to step 5, that is, the constant current charging stage.

<Stage 5>
After shifting to the constant current charging stage, the control unit transmits instruction 4 (corresponding to the fourth instruction) to the charged device (for example, the terminal) at regular time intervals, and the charged device (for example, for example) is charged. Terminal) You can inquire about the current voltage of the battery. The charged device (eg, the terminal) can feed back the current voltage of the charged device (eg, the terminal) battery by transmitting the response instruction of the instruction 4 to the control unit. The control unit determines whether the contact of the charging interface is good and whether the output current of the second adapter needs to be reduced, based on the current voltage of the battery to be charged (eg, the terminal). be able to. When the charging interface determines that the charging interface is poor, the second adapter can transmit instruction 5 (corresponding to the fifth instruction) to the device to be charged (for example, a terminal), and the second adapter uses the second charging. After exiting the mode, reset and move to stage 1 again.

Optionally, in some embodiments, in step 1, when the charged device (eg, the terminal) sends the response instruction of instruction 1, the response instruction of instruction 1 is the charged device (eg, terminal). ) Path impedance data (or information) may be provided. The path impedance data of the device to be charged (for example, the terminal) is configured to determine whether or not the contact of the charging interface is good in step 5.

Optionally, in some embodiments, in step 2, from when the second adapter agrees to charge the charged device (eg, terminal) in the second charging mode. The time until the control unit adjusts the output voltage of the second adapter to an appropriate charging voltage can be controlled within a certain range. When the time exceeds a predetermined range, the second adapter or the device to be charged (for example, a terminal) can determine that an abnormality has occurred in the communication process of quick charging, and resets and shifts to step 1 again.

Optionally, in some embodiments, in step 2, the output voltage of the second adapter may be set to ΔV (ΔV is 200-500 mV) above the current voltage high of the battery to be charged (eg, terminal). ) When it becomes high, the charged device (for example, the terminal) sends the response instruction of the instruction 2 to the control unit, so that the output voltage of the second adapter matches the battery voltage of the charged device (for example, the terminal). Show that you do.

Optionally, in some embodiments, in step 4, the adjustment rate of the output current of the second adapter can be controlled within a range, thus resulting in a second charging mode due to an overadjustment rate. Therefore, it is possible to prevent the occurrence of an abnormality in the charging process of the device to be charged (for example, the terminal) by the output of the second adapter.

Optionally, in some embodiments, in step 5, the range of change in the output current of the second adapter can be controlled within 5%.

Optionally, in some embodiments, in step 5, the control unit can monitor the path impedance of the charging circuit in real time. Specifically, the control unit may monitor the path impedance of the charging circuit based on the output voltage, output current, and current voltage of the battery fed back from the device to be charged (eg, the terminal) of the second adapter. can. When the path impedance of the charging circuit is larger than the sum of the path impedance of the device to be charged (for example, the terminal) and the impedance of the charging cable (“path impedance of the charging circuit”> “path impedance of the device to be charged (for example, the terminal)”) "+" Impedance of the charging cable "), the charging interface can be determined to be poor contact, and the second adapter stops charging the device to be charged (for example, the terminal) in the second charging mode.

Optionally, in some embodiments, the second adapter enables charging of the charged device (eg, terminal) in the second charging mode, followed by a control unit and the charged device (eg, terminal). The communication time interval between the two can be controlled within a certain range, and it is possible to prevent the occurrence of an abnormality in the communication process due to an insufficient communication interval.

Optionally, in some embodiments, the stoppage of the charging process (or the stoppage of the charging process to the device to be charged (eg, the terminal) in the second charging mode by the second adapter) is a recoverable stop and recovery. It can be divided into two types of impossible stops.

For example, when the device to be charged (for example, a terminal) detects that the battery is fully charged or the contact of the charging interface is poor, the charging process is stopped, the charging communication process is reset, and the charging process shifts to stage 1 again. After that, the charged device (eg, the terminal) does not move to stage 2 if the second adapter does not agree to charge the charged device (eg, the terminal) in the second charging mode. In this case, the stoppage of the charging process can be regarded as an irreparable stoppage.

As another example, when a communication abnormality occurs between the control unit and the device to be charged (for example, a terminal), the charging process is stopped, the charging communication process is reset, and the charging process shifts to stage 1 again. After satisfying the requirements of step 1, the charged device (eg, terminal) agrees that the second adapter will charge the charged device (eg, terminal) in the second charging mode in order to restore the charging process. do. In this case, the cessation of the charging process can be considered a recoverable cessation.

As another example, when the device to be charged (for example, a terminal) detects the occurrence of an abnormality in the battery, it stops the charging process and resets the charging communication process, and the charging process shifts to the stage 1 again. After that, the charged device (eg, the terminal) does not agree that the second adapter charges the charged device (eg, the terminal) in the second charging mode. After the battery has recovered normally and meets the requirements of step 1, the charged device (eg, terminal) agrees that the second adapter will charge the charged device (eg, terminal) in the second charging mode. do. In this case, the cessation of the fast charging process can be considered a recoverable cessation.

The communication step or operation shown in FIG. 19B is merely an example. For example, in step 1, after the charged device (eg, terminal) is connected to the second adapter, the handshake communication between the charged device (eg, terminal) and the control unit is performed by the charged device (eg, eg). Can be started by the terminal). That is, the charged device (for example, the terminal) transmits instruction 1 to inquire whether the control unit can operate the second charging mode. When the charged device (for example, the terminal) receives the response instruction of the control unit indicating that the control unit agrees to charge the charged device (for example, the terminal) in the second charging mode by the second adapter. The second adapter starts charging the battery of the device to be charged (for example, the terminal) in the second charging mode.

As another example, after step 5, a constant voltage charging step may be included. Specifically, in step 5, the charged device (eg, the terminal) feeds back the current voltage of the battery to the control unit, and if the current voltage of the battery reaches the voltage threshold of constant voltage charging, the charging step is determined. Switch from the constant current charging stage to the constant voltage charging stage. In the constant voltage charging stage, the charging current gradually decreases, and when it drops to a certain threshold value, the entire charging process is completed, indicating that the battery of the device to be charged (for example, the terminal) is fully charged.

Optionally, in some embodiments, the output current of the second adapter is also referred to as pulsating direct current (one-way pulsating output current, pulsating waveform current, or steamed-bun shaped current). Is called). The waveform of the pulsating direct current is shown in FIG.

As the output power of the second adapter increases, the second adapter tends to cause the phenomenon of lithium precipitation of the battery when charging the battery in the device to be charged (for example, the terminal), thus shortening the service life of the battery. In order to improve the reliability and safety of the battery, in the embodiment of the present invention, the second adapter is controlled to output pulsating direct current. Pulsating direct current can reduce the probability and intensity of contact arcs in the charging interface and improve the life of the charging interface. The output current of the second adapter can be set to pulsating direct current in various forms. For example, the output current of the second adapter can be set to pulsating direct current by removing the secondary filter unit in the power conversion unit 11, rectifying the secondary current, and then outputting as it is to generate pulsating direct current.

Further, as shown in FIG. 21, based on any of the above embodiments, the second adapter 10 can operate in the first charging mode and the second charging mode, and the charged device in the second charging mode ( For example, the charging speed for the terminal) is faster than the charging speed for the charged device (for example, the terminal) in the first charging mode. The power conversion unit 11 may include a secondary filter unit 211, and the second adapter 10 may include a control unit 212. The control unit 212 is connected to the secondary filter unit 211. In the first charging mode, the control unit 212 controls the secondary filter unit 211 to operate, so that the voltage value of the output voltage of the second adapter 10 is maintained constant. In the second charging mode, the control unit 212 controls the operation of the secondary filter unit 211 so as to stop the operation, so that the output current of the second adapter 10 becomes pulsating direct current.

In the embodiment of the present invention, the control unit controls whether or not the secondary filter unit operates, so that the second adapter can output a normal direct current having a constant current value, and the output current value. It is also compatible with the conventional charging mode because it can output a pulsating direct current that changes.

Optionally, in some embodiments, the second adapter 10 is capable of operating in a second charging mode, which may be a constant current mode. In the second charging mode, the output current of the second adapter is an AC that can similarly reduce the lithium precipitation phenomenon of the lithium cell and improve the service life of the cell.

Optionally, in some embodiments, the second adapter 10 is capable of operating in a second charging mode, which may be a constant current mode. In the second charging mode, the output voltage and output current of the second adapter are directly applied to both ends of the battery of the device to be charged (for example, a terminal) to directly charge the battery.

Specifically, direct charging means that the output voltage and output current of the second adapter are directly applied (or directly introduced) to both ends of the battery of the device to be charged (for example, a terminal) without being converted by a conversion circuit. It can refer to charging the battery of a charging device (eg, a terminal). In this way, the direct charge can prevent power loss due to the conversion process. In order to allow adjustment of the charging voltage or charging current in the charging circuit in the process of charging by the second charging mode, the second adapter may be designed as an intelligent adapter, and the charging voltage by such a second adapter. Alternatively, by converting the charging current, the load on the charged device (for example, the terminal) can be reduced, and the heat generation amount of the charged device can be reduced. The constant current mode in the present specification refers to a charging mode for controlling the output current of the second adapter, and should not be construed as requiring that the output current of the second adapter be always kept constant (invariant). In practice, the second adapter is often charged by a multi-stage constant current in a constant current mode.

Multi-stage constant current charging has N (N is an integer of 2 or more) charging stages. In the multi-stage constant current charging, the first stage charging can be started with a predetermined charging current. The N charging stages of the multi-stage constant current charging are sequentially executed from the first stage to the first (N-1) stage, and after shifting from the previous charging stage in the charging stage to the next charging stage, the charging current value. When the voltage becomes smaller and the battery voltage reaches the threshold value of the charge termination voltage, the process shifts from the previous charging stage in the charging stage to the next charging stage.

Further, when the output current of the second adapter is pulsating direct current, the constant current mode is a charging mode for controlling the peak value or average value of pulsating direct current, that is, as shown in FIG. 22, the output current of the second adapter. It can refer to a charging mode in which the peak value is controlled so as not to exceed the current corresponding to the constant current mode. Further, when the output current of the second adapter is alternating current, the constant current mode may refer to a charging mode for controlling the peak value of alternating current.

Hereinafter, embodiments of the present invention will be described in more detail with reference to specific examples. It should be noted that the example of FIG. 23 is merely for those skilled in the art to understand the embodiments of the present invention and is not limited to specific numerical values or specific scenarios illustrating the embodiments of the present invention. It should be. It is clear that various equivalent modifications or modifications made by those skilled in the art based on the illustrations shown in FIG. 23 fall within the scope of the embodiments of the present invention.

The second adapter includes a power conversion unit (corresponding to the power conversion unit 11). As shown in FIG. 23, the power conversion unit may include an AC AC input end, a primary rectifying unit 231, a transformer T1, a secondary rectifying unit 232, and a secondary filter unit 233.

Specifically, after introducing a rated current (mains current, which is an AC at 220 V) at the input end of the AC AC, the rated current is transmitted to the primary rectifier unit 231.

The primary rectifying unit 231 is configured to convert the rated current to the first pulsating direct current and then transmit the first pulsating direct current to the transformer T1. In the embodiment of the present invention, the primary rectification unit 231 is not particularly limited, and may be, for example, a bridge rectification unit such as the full-bridge rectification unit or the half-bridge rectification unit shown in FIG.

A primary filter unit is provided on the primary side of the conventional adapter. The primary filter unit is generally filtered by a liquid aluminum electrolytic capacitor, but the volume of the liquid aluminum electrolytic capacitor is relatively large, which causes an increase in the volume of the adapter. Since the primary side of the second adapter according to the embodiment of the present invention is not provided with the primary filter unit, the volume of the second adapter can be significantly reduced.

The transformer T1 couples the first pulsating direct current from the primary side to the secondary side of the transformer to obtain the second pulsating direct current, and outputs the second pulsating direct current from the secondary winding of the transformer T1. It is configured in. The transformer T1 may be a normal transformer or a high frequency transformer having an operating frequency of 50 KHz to 2 MHz. The number of primary windings of the transformer T1 and the connection form vary depending on the type of switching power supply used in the second adapter, but are not particularly limited in the embodiment of the present invention. As shown in FIG. 23, the second adapter can use a flyback switching power supply. The primary winding of the transformer has one end connected to the primary rectifying unit 231 and the other end connected to a switch controlled by a PWM controller. Needless to say, the second adapter may be a forward switching power supply or a second adapter using a push-pull switching power supply. Primary rectifier units and transformers in different types of switching power supplies have their respective connection configurations, which are omitted here for brevity.

The secondary rectifying unit 232 is configured to rectify the second pulsating direct current output from the secondary winding of the transformer T1 to obtain the third pulsating direct current. The secondary rectifier unit 232 has various forms, but FIG. 23 shows a typical secondary synchronous rectifier circuit. The synchronous rectifier circuit comprises a Synchronous Rectifier (SR) chip, a MOS (Metal Oxide Semiconductor, MOS) transistor controlled by the SR chip, and diodes connected to both ends of the source and drain of the MOS transistor. include. The SR chip realizes secondary synchronous rectification by transmitting a PWM control signal to the gate of the MOS transistor and controlling the on / off of the MOS transistor.

The secondary filter unit 233 rectifies the second pulsating direct current output from the secondary rectifying unit 232 to obtain the output voltage and output current of the second adapter (that is, the voltage and current across VBUS and GND in FIG. 23). It is configured to get. In the embodiment of FIG. 23, the capacitor in the secondary filter unit 233 can be filtered by a solid capacitor, or a solid capacitor connected in parallel and a normal capacitor (for example, a ceramic capacitor).

Further, the secondary filter unit 233 may include a switch unit such as the switch transistor Q1 in FIG. 23. The switch transistor Q1 receives a control signal transmitted from the MCU. When the MCU controls the switch transistor Q1 to turn on, the secondary filter unit 233 starts operating to operate the second adapter in the first charging mode. In the first charging mode, the second adapter may be direct current with an output voltage of 5V and a stable output current. When the MCU controls the switch transistor Q1 to turn off, the secondary filter unit 233 stops operating and operates the second adapter in the second charging mode. In the second charging mode, the second adapter directly outputs the pulsating direct current obtained by rectifying the secondary rectifying unit 232.

Further, the second adapter may include a voltage feedback unit (corresponding to the voltage feedback unit 12). As shown in FIG. 23, the voltage feedback unit may include a resistor R1, a resistor R2 and a first operational amplifier OPA1.

Specifically, the resistor R1 and the resistor R2 sample the output voltage of the second adapter (that is, the voltage in VBUS) and transfer the obtained first voltage to the reverse phase input end of the OPA1 so that the second adapter can be used. Indicates the magnitude of the output voltage of. The common mode input end of the first operational amplifier OPA1 is connected to the DAC1 port of the MCU via DAC1. The MCU adjusts the voltage value of the reference voltage (corresponding to the first reference voltage) of the first operational amplifier OPA1 by controlling the magnitude of the analog amount output from the DAC1, and the voltage feedback unit further corresponds to it. Adjust the voltage value of the target voltage.

Further, the second adapter may include a current feedback unit (corresponding to the current feedback unit 13). As shown in FIG. 23, the current feedback unit may include a resistor R3, a galvanometer, a resistor R4, a resistor R5, and a second operational amplifier OPA2.

Specifically, the resistor R3 is a current detection resistor. The galvanometer detects the current flowing through the resistor R3 to obtain the output current of the second adapter, converts the output current of the second adapter into the corresponding voltage value, and outputs the current to both ends of the resistor R4 and the resistor R5. A second voltage is obtained by dividing the voltage. The second voltage is configured to indicate the magnitude of the output current of the second adapter. The reverse phase input end of the second operational amplifier OPA2 is configured to receive the second voltage. The common mode input end of the second operational amplifier OPA2 is connected to the DAC2 port of the MCU via DAC2. The MCU adjusts the voltage value of the reference voltage of the second operational amplifier OPA2 (corresponding to the second reference voltage) by controlling the magnitude of the analog amount output from the DAC2, and the current feedback unit further supports it. Adjust the current value of the target current.

The second adapter further includes a power adjustment unit (corresponding to the power adjustment unit 14). As shown in FIG. 23, the power adjustment unit may include a first diode D1, a second diode D2, a photoelectric coupling unit 234, a PWM controller, and a switch transistor Q2.

Specifically, the first diode D1 and the second diode D2 are two diodes connected in antiparallel, and the anodes of the first diode D1 and the second diode D2 are connected to the feedback point shown in FIG. Has been done. The input end of the photoelectric coupling unit 234 is configured to receive the voltage signal of the feedback point. When the voltage of the feedback point is lower than the operating voltage VDD of the photoelectric coupling unit 234, the photoelectric coupling unit 234 starts the operation so as to supply the feedback voltage to the FB end of the PWM controller. The PWM controller controls the duty ratio of the PWM signal output from the PWM end by comparing the voltage at the CS end with the voltage at the FB end. When the voltage signal output from the first operational capacitor OPA1 (that is, the voltage feedback signal described above) is 0, or when the voltage signal output from the second operational capacitor OPA2 (that is, the voltage feedback signal described above) is 0. The voltage at the FB end is stable, and the duty ratio of the PWM control signal output from the PWM end of the PWM controller is maintained constant. The PWM end of the PWM controller is connected to the primary winding of the transformer T1 via the switch transistor Q2, and is configured to control the output voltage and output current of the second adapter. When the duty ratio of the control signal transmitted from the PWM end is constant, the output voltage and output current of the second adapter are stably maintained.

Further, the second adapter in FIG. 23 further includes a first adjustment unit and a second adjustment unit. As shown in FIG. 23, the first adjustment unit includes an MCU (corresponding to the control unit) and DAC1, adjusts the voltage value of the reference voltage of the first operational amplifier OPA1, and further adjusts the voltage value corresponding to the voltage feedback unit. It is configured to adjust the voltage value of. The second adjustment unit includes the MCU (corresponding to the control unit) and DAC2, and is configured to adjust the reference voltage of the second operational amplifier OPA2 and further adjust the current value of the target current corresponding to the current feedback unit. ing.

The MCU can adjust the voltage value of the target voltage and the current value of the target current based on the currently used charging mode of the second adapter. For example, the second adapter can adjust the target voltage to the voltage corresponding to the constant voltage mode and the target current to the maximum output current allowed in the constant voltage mode when charging in the constant voltage mode. As another example, when charging in constant current mode, the second adapter adjusts the target current to the current corresponding to the constant current mode and adjusts the target voltage adjustment to the maximum output voltage allowed in the constant current mode. be able to.

For example, in constant voltage mode, the target voltage may be adjusted to a fixed voltage value (eg, 5V). A primary filter unit is provided on the primary side (since the primary filter unit uses a large volume liquid aluminum electrolytic capacitor, in the embodiment of the present invention, the primary filter unit is removed in order to reduce the volume of the second adapter). The target current can be set to 500 mA or 1 A in view of the limited load capacity of the secondary filter unit 233. The second adapter first adjusts the output voltage to 5V based on the voltage feedback loop. When the output current of the second adapter reaches the target current, the current feedback loop controls the output current of the second adapter so that it does not exceed the target current. In constant current mode, the target current can be set to 4A and the target voltage can be set to 5V. Since the output current of the second adapter is pulsating direct current, the current peak value of pulsating direct current can be maintained at 4A by performing peak clipping processing for a current higher than 4A by the current feedback loop. When the output voltage of the second adapter exceeds the target voltage, the voltage feedback loop controls the output voltage of the second adapter so that it does not exceed the target voltage.

The MCU may also include a communication interface. The MCU can perform bidirectional communication with a charged device (for example, a terminal) via the communication interface and control the charging process of the second adapter. Taking the case where the charging interface is a USB interface as an example, the communication interface may be the USB interface. Specifically, the second adapter charges the charged device (for example, a terminal) by the power supply line in the USB interface, and the charged device (for example, the terminal) by the data line (D + and / or D-) in the USB interface. Can communicate with.

Further, the photoelectric coupling unit 234 is connected to the voltage adjusting unit, and the operating voltage of the optocoupler can be stably maintained. As shown in FIG. 23, the voltage stabilizing unit (voltage adjusting unit) in the embodiment of the present invention can be realized by a low dropout regulator (LDO).

FIG. 23 describes an example in which the control unit (MCU) adjusts the reference voltage of the first operational amplifier OPA1 by the DAC1. Such a reference voltage adjusting method corresponds to the reference voltage adjusting method shown in FIG. 4, but the embodiment of the present invention is not limited to this, and for example, any of the reference voltage adjustment methods shown in FIGS. 5 to 8. The reference voltage adjustment method can be used, and detailed description is omitted here for the sake of brevity.

FIG. 23 describes an example in which the control unit (MCU) adjusts the reference voltage of the second operational amplifier OPA2 by the DAC2. Such a reference voltage adjusting method corresponds to the reference voltage adjusting method shown in FIG. 12, but the embodiment of the present invention is not limited to this, and for example, any of the reference voltage adjustment methods shown in FIGS. 13 to 16. The reference voltage adjustment method can be used, and detailed description is omitted here for the sake of brevity.

As described above, the embodiment of the apparatus according to the present invention has been described in detail with reference to FIGS. 1 to 23. Hereinafter, a method embodiment according to an embodiment of the present invention will be described in detail with reference to FIG. 24. Since the description of the method corresponds to the description of the device, the duplicated description is appropriately omitted here for the sake of brevity.

FIG. 24 is a flow chart of a charge control method according to an embodiment of the present invention. The charging method of FIG. 24 can be performed by the second adapter 10 described above. The charging method may include the following operations 2410 to 2440.

In 2410, the output voltage and output current of the second adapter are obtained by converting the input alternating current.

In 2420, by detecting the output voltage of the second adapter, a voltage feedback signal indicating whether or not the output voltage of the second adapter has reached a predetermined target voltage is generated.

In 2430, by detecting the output current of the second adapter, a current feedback signal indicating whether or not the output current of the second adapter has reached a predetermined target current is generated.

At 2440, if the voltage feedback signal indicates that the output voltage of the second adapter has reached the target voltage, or if the current feedback signal indicates that the output current of the second adapter has reached the target current, the second adapter Stabilize the output voltage and output current.

Optionally, in some embodiments, the second adapter is capable of operating in a first charging mode, which is a constant voltage mode. In the constant voltage mode, the target voltage is the voltage corresponding to the constant voltage mode, and the target current is the maximum output current allowed in the constant voltage mode of the second adapter. The method of FIG. 24 may further include adjusting the output voltage of the second adapter to a voltage corresponding to the constant voltage mode based on the voltage feedback signal. At 2440, if the current feedback signal indicates that the output current of the second adapter has reached the maximum output current allowed in the constant voltage mode of the second adapter, then the output current of the second adapter is in the constant voltage mode of the second adapter. It may include controlling so as not to exceed the maximum output current allowed in.

Optionally, in some embodiments, the second adapter includes a primary rectifying unit, a transformer, a secondary rectifying unit, and a secondary filter unit. The primary rectification unit outputs the voltage of the pulsating waveform directly to the transformer.

Optionally, in some embodiments, the maximum output current allowed in the constant voltage mode of the second adapter is determined based on the capacitor capacity in the secondary filter unit.

Optionally, in some embodiments, the second adapter is capable of operating in a second charging mode, which is a constant current mode. In the constant current mode, the target voltage is the maximum output voltage allowed in the constant current mode of the second adapter, and the target current is the current corresponding to the constant current mode. The method of FIG. 24 further comprises adjusting the output current of the second adapter to the current corresponding to the constant current mode based on the current feedback signal. At 2440, if the voltage feedback signal indicates that the output voltage of the second adapter has reached the maximum output voltage allowed in the constant current mode of the second adapter, then the output voltage of the second adapter is in the constant current mode of the second adapter. Control so that the maximum output voltage allowed by is not exceeded.

Optionally, in some embodiments, the method of FIG. 24 further comprises adjusting the value of the target voltage.

Optionally, in some embodiments, the second adapter is capable of operating in a first charge mode and a second charge mode. Adjusting the target voltage value may include adjusting the target voltage value based on the currently used first or second charging mode of the second adapter.

Optionally, in some embodiments, generating a voltage feedback signal by detecting the output voltage of the second adapter means sampling the output voltage of the second adapter to obtain the first voltage. It may include comparing the first voltage with the first reference voltage and generating a voltage feedback signal based on the comparison result between the first voltage and the first reference voltage. Adjusting the value of the target voltage includes adjusting the value of the target voltage by adjusting the value of the first reference voltage.

Optionally, in some embodiments, the value of the first reference voltage is adjusted by a first DAC.

Optionally, in some embodiments, the value of the first reference voltage is adjusted by the RC filter unit.

Optionally, in some embodiments, the value of the first reference voltage is adjusted by a digital potentiometer.

Optionally, in some embodiments, generating a voltage feedback signal by detecting the output voltage of the second adapter divides the output voltage of the second adapter based on a predetermined voltage division ratio. Including generating a first voltage, comparing the first voltage with the first reference voltage, and generating a voltage feedback signal based on the comparison result between the first voltage and the first reference voltage. good. Adjusting the value of the target voltage includes adjusting the voltage value of the target voltage by adjusting the voltage division ratio.

Optionally, in some embodiments, the voltage division ratio is the voltage division ratio of a digital potentiometer.

Optionally, in some embodiments, the method of FIG. 24 may include adjusting the current value of the target current.

Optionally, in some embodiments, the second adapter is capable of operating in a first charge mode and a second charge mode. Adjusting the current value of the target current may include adjusting the current value of the target current based on the currently used first charging mode or the second charging mode of the second adapter.

Optionally, in some embodiments, generating a current feedback signal by detecting the output current of the second adapter is to sample the output current of the second adapter and of the output current of the second adapter. Obtaining a second voltage indicating the magnitude, comparing the second voltage with the second reference voltage, and generating a current feedback signal based on the comparison result of the second voltage and the second reference voltage. May include. Adjusting the current value of the target current may include adjusting the current value of the target current by adjusting the voltage value of the second reference voltage.

Optionally, in some embodiments, the value of the second reference voltage is adjusted by a second DAC.

Optionally, in some embodiments, the value of the second reference voltage is adjusted by the RC filter unit.

Optionally, in some embodiments, the value of the second reference voltage is adjusted by a digital potentiometer.

Optionally, in some embodiments, generating a current feedback signal by detecting the output current of the second adapter can sample the output current of the second adapter and output current of the second adapter. A current feedback signal is generated based on the results of obtaining a third voltage indicating the magnitude of the voltage, comparing the second voltage with the second reference voltage, and comparing the second voltage with the second reference voltage. It may include things. Adjusting the current value of the target current may include adjusting the current value of the target current by adjusting the voltage division ratio.

Optionally, in some embodiments, the voltage division ratio is the voltage division ratio of a digital potentiometer.

Optionally, in some embodiments, the second adapter is capable of operating in a first charging mode and a second charging mode. In the second adapter, the charging speed of the charged device in the second charging mode is faster than the charging speed of the charged device in the first charging mode. The method of FIG. 24 is to control the output of the second adapter in the second charging mode by performing bidirectional communication with the charged device in the process of connecting the second adapter to the charged device. May be further included.

Optionally, in some embodiments, the process of controlling the output of the second adapter in the second charging mode by bidirectional communication with the charged device is bidirectional with the charged device. By communicating, it may include negotiating a charging mode between the second adapter and the charged device.

Optionally, in some embodiments, the charged device negotiates a charging mode between the second adapter and the charged device by bidirectional communication with the charged device. The first instruction asking whether or not to enable the second charging mode is transmitted to the charged device, and the charged device transmitted from the charged device sets the second charging mode. If you agree to receive the response instruction of the first instruction indicating whether or not you agree to enable the operation, and if the charged device agrees to enable the second charging mode, the second It may include charging the device to be charged in the charging mode.

Optionally, in some embodiments, controlling the output of the second adapter in the second charging mode by bidirectional communication with the charged device is bidirectional communication with the charged device. By performing the above, the charging voltage for charging the charged device output from the second adapter in the second charging mode is determined, and the voltage value of the target voltage is the voltage value in the second charging mode. It may include adjusting the voltage value of the target voltage so as to be equal to the charging voltage for charging the charged device output from the second adapter.

Optionally, in some embodiments, the charging voltage for charging the charged device output from the second adapter in the second charging mode is set by performing bidirectional communication with the charged device. To determine, send a second instruction to the charged device to inquire whether the output voltage of the second adapter matches the current voltage of the battery of the charged device, and to determine the charged device. Receiving the response instruction of the second instruction indicating whether the output voltage of the second adapter matches the current voltage of the battery or is higher or lower than the current voltage of the battery transmitted from. May include.

Optionally, in some embodiments, controlling the output of the second adapter in the second charging mode by bidirectional communication with the charged device is bidirectional communication with the charged device. By performing the above, the charging current for charging the charged device output from the second adapter in the second charging mode is determined, and the current value of the target current is the current value in the second charging mode. It may include adjusting the current value of the target current so as to be equal to the charging current for charging the charged device output from the second adapter.

Optionally, in some embodiments, by performing bidirectional communication with the charged device, the charging current for charging the charged device output from the second adapter in the second charging mode can be obtained. The determination is to send to the charged device a third instruction asking for the maximum charging current currently supported by the charged device, and to determine by the charged device currently transmitted from the charged device. Receiving the response instruction of the third instruction indicating the maximum charge current supported and outputting from the second adapter in the second charge mode based on the maximum charge current currently supported by the device to be charged. It may include determining the charging current for charging the charged device.

Optionally, in some embodiments, controlling the output of the second adapter in the second charging mode by bidirectional communication with the charged device is charging in the second charging mode. In the process, it may be included to adjust the output current of the second adapter by performing bidirectional communication with the charged device.

Optionally, in some embodiments, adjusting the output current of the second adapter by performing bidirectional communication with the charged device queries the current voltage of the battery of the charged device. 4 Sending the instruction to the charged device, receiving the response instruction of the 4th instruction indicating the current voltage of the battery transmitted from the 2nd adapter, and the current voltage of the battery. It may include adjusting the output current of the second adapter based on the above.

Optionally, in some embodiments, the second adapter comprises a charging interface. The second adapter performs bidirectional communication with the charged device via the data line in the charging interface.

Optionally, in some embodiments, the second adapter can operate in a second charging mode, which is a constant current mode, in which the output current of the second adapter is pulsating direct current. be.

Optionally, in some embodiments, the second adapter can operate in a first charging mode, which is a constant voltage mode. The second adapter includes a secondary filter unit. In the method of FIG. 24, the voltage value of the output voltage of the second adapter is maintained constant by controlling the secondary filter unit to operate in the first charging mode, and the second charging mode is present. In the above, by controlling so as to stop the operation of the secondary filter unit, it may be further included that the output current of the second adapter becomes a pulsating direct current.

Optionally, in some embodiments, the second adapter is operable in a second charging mode, which is a constant current mode, in which the output current of the second adapter is alternating current. ..

Optionally, in some embodiments, the second adapter is operable in a second charging mode, in which the output voltage and output current of the second adapter are the same as that of the device to be charged. It is applied directly to both ends of the battery to directly charge the battery.

Optionally, in some embodiments, the second adapter is a second adapter configured to charge a mobile charged device.

Optionally, in some embodiments, the second adapter comprises a control unit, which is an MCU, configured to control the charging process.

Optionally, in some embodiments, the second adapter includes a charging interface, which is a USB interface.

It is understood that the "first adapter" and "second adapter" in the text are for convenience of explanation only and do not limit the specific type of the adapter according to the embodiment of the present invention. Should be.

As will be appreciated by those skilled in the art, the various units and algorithm steps described in connection with the embodiments disclosed herein are performed in electronic hardware, or a combination of computer software and electronic hardware. It is possible. Whether these functions are realized by hardware or software depends on the specific application of the technical means and the constraints of the design. One of ordinary skill in the art can realize the above functions by using different methods for each specific application, however, this realization should not be regarded as beyond the scope of the present invention.

In addition, for convenience and conciseness of description, as can be understood by those skilled in the art, for the detailed operation process of the system, the apparatus, and the unit, the process corresponding to the above-mentioned method embodiment can be referred to. Therefore, I will not explain it again.

In some embodiments provided in this application, the disclosed systems, devices, and methods should be considered to be feasible in other ways. For example, the device embodiments described above are merely exemplary. For example, the unit division is merely a logical functional division, and may be another division in an actual implementation form. For example, multiple units or components can be combined or incorporated into different systems, or some features are ignored or not implemented. In addition, the interconnected or direct coupled or communication connections displayed or described can be realized via some interface, and the indirect coupling or communication connection of devices or units can be in electrical, mechanical, or communication form. It may be in another form.

Units described as separate members may or may not be physically separate. The member as a display unit may be a physical unit or may not be a physical unit, that is, it may be in one position, or it may be distributed in a plurality of network units. .. Some or all of the units may be selected according to actual needs in order to achieve the objectives of the technical means according to the embodiment.

Further, each functional unit in each embodiment of the present invention may be incorporated into one processing unit, may be physically present independently, or two or more units may be incorporated into one unit. good.

If the above functions are implemented in a software function unit and sold or used as an independent product, the software may be stored on a computer-readable storage medium. Based on such an understanding, the gist of the technical means of the present invention, a part contributing to the prior art, or a part of the technical means may be realized by a software product. This computer software product is stored on a storage medium and has some commands to cause a computer (such as a personal computer, server, or network device) to perform all or part of the steps of the methods according to various embodiments of the invention. May include. The storage medium can store a program code such as a USB memory, a removable hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk, or an optical disk. Any medium may be included.

Although the embodiments of the present invention have been described above, those skilled in the art can understand that the above embodiments are not limited to exemplary ones and cannot be interpreted to limit the present invention. Various modifications, modifications, substitutions and modifications can be made to these embodiments without departing from the principles and gist of the present invention.

Claims (22)

It ’s an adapter,
A power conversion unit configured to obtain the output voltage and output current of the adapter by converting the input alternating current, and
The input end is connected to the power conversion unit, and by detecting the output voltage of the adapter, it is configured to generate a voltage feedback signal indicating whether or not the output voltage of the adapter has reached a predetermined target voltage. With a voltage feedback unit
The input end is connected to the power conversion unit, and by detecting the output current of the adapter, it is configured to generate a current feedback signal indicating whether or not the output current of the adapter has reached a predetermined target current. The current feedback unit and the input end are connected to the output end of the voltage feedback unit and the output end of the current feedback unit, and the output end is connected to the power conversion unit to transmit the voltage feedback signal and the current feedback signal. When received and the voltage feedback signal indicates that the output voltage of the adapter has reached the target current, or the current feedback signal indicates that the output current of the adapter has reached the target current, the adapter. A power adjustment unit configured to stabilize the output voltage and output current of
Including
The target voltage and the target current are adjusted in real time according to the state of the battery of the device to be charged.
The adapter can operate in the first charging mode, which is a constant voltage mode. In the constant voltage mode, the target voltage is a voltage corresponding to the constant voltage mode, and the target current is the constant voltage of the adapter. The maximum output current allowed in the mode,
The power adjustment unit adjusts the output voltage of the adapter to a voltage corresponding to the constant voltage mode based on the voltage feedback signal, and the current feedback signal is the output current of the adapter and the output current of the adapter is the constant voltage mode of the adapter. When the maximum output current allowed in the adapter is reached, the output current of the adapter is controlled so as not to exceed the maximum output current allowed in the constant voltage mode of the adapter.
The adapter can operate in a second charging mode, which is a constant current mode, in which the target voltage is the maximum output voltage allowed in the constant current mode of the adapter, and the target current is It is a current corresponding to the constant current mode.
The power adjustment unit adjusts the output current of the adapter to a current corresponding to the constant current mode based on the current feedback signal, and the voltage feedback signal is the output voltage of the adapter and the output voltage of the adapter is the constant current mode of the adapter. When the maximum output voltage allowed in the adapter is reached, the output voltage of the adapter is controlled so as not to exceed the maximum output voltage allowed in the constant current mode of the adapter.
The adapter further comprises a charging interface, the adapter communicates bidirectionally with the device to be charged via the data line of the charging interface, and the adapter can operate in a first charging mode and a second charging mode. The charging speed for the device to be charged in the second charging mode is faster than the charging speed for the device to be charged in the first charging mode, the adapter includes a control unit, and the adapter is connected to the device to be charged. The adapter is characterized in that the control unit controls the output of the adapter in the second charging mode by performing bidirectional communication with the charged device. The adapter according to claim 1, wherein the adapter is connected to the voltage feedback unit and further includes a first adjusting unit configured to adjust the value of the target voltage. The voltage feedback unit is
A first voltage divider unit whose input end is connected to the power conversion unit and is configured to divide the output voltage of the adapter based on a predetermined voltage divider ratio to generate a first voltage.
The input end is connected to the output end of the first voltage dividing unit, the first voltage and the first reference voltage are compared, and the voltage is based on the comparison result between the first voltage and the first reference voltage. Includes a voltage comparison unit, which is configured to generate a feedback signal,
The second aspect of the present invention, wherein the first adjusting unit is connected to the first voltage dividing unit and adjusts the value of the target voltage by adjusting the voltage dividing ratio of the first voltage dividing unit. Adapter. The first voltage divider unit includes a first digital potentiometer.
The first adjustment unit includes a first control unit.
In the first digital potentiometer, the high potential end is connected to the power conversion unit, the low potential end is grounded, and the output end is connected to the input end of the voltage comparison unit.
The adapter according to claim 3, wherein the first control unit is connected to a control end of the first digital potentiometer and is configured to adjust the voltage division ratio of the first digital potentiometer. The voltage comparison unit includes a first operational amplifier, and the first operational amplifier has a reverse-phase input end that receives the first voltage, an in-phase input end that receives the first reference voltage, and an output that generates the voltage feedback signal. The adapter according to claim 3 or 4, characterized in that it comprises an end. The adapter can operate in a first charging mode and a second charging mode, and the first adjusting unit has the target voltage based on the adapter's currently used first or second charging mode. The adapter according to any one of claims 2 to 5, characterized in that the adjustment of the value of is performed. 13. The listed adapter. The current feedback unit is
A current sampling unit whose input end is connected to the power conversion unit and is configured to sample the output current of the adapter to obtain a third voltage indicating the magnitude of the output current of the adapter.
A second voltage dividing unit whose input end is connected to the output end of the current sampling unit and is configured to divide a third voltage based on a predetermined voltage dividing ratio to generate a second voltage.
The input end is connected to the output end of the second voltage dividing unit, the second voltage and the second reference voltage are compared, and the current is based on the comparison result between the second voltage and the second reference voltage. Includes a current comparison unit, which is configured to generate a feedback signal.
The second adjusting unit is connected to the second voltage dividing unit, and adjusts the current value of the target current by adjusting the voltage dividing ratio of the second voltage dividing unit, according to claim 7. The listed adapter. The second voltage dividing unit includes a second digital potentiometer.
The second adjustment unit includes a second control unit.
In the second digital potentiometer, the high potential end is connected to the output end of the current sampling unit, the low potential end is grounded, and the output end is connected to the input end of the voltage comparison unit.
The adapter according to claim 8, wherein the second control unit is connected to a control end of the second digital potentiometer and is configured to adjust the voltage division ratio of the second digital potentiometer. The current comparison unit includes a second operational amplifier, and the second operational amplifier has a reverse-phase input end that receives the second voltage, an in-phase input end that receives the second reference voltage, and an output that generates the current feedback signal. The adapter according to claim 8 or 9, wherein the adapter comprises an end. The adapter can operate in a first charge mode and a second charge mode, and the second adjustment unit is based on the currently used first charge mode or second charge mode of the adapter. The adapter according to any one of claims 8 to 10, characterized in that the adjustment of the current value of the above is performed. The power conversion unit includes a primary rectifying unit, a transformer, a secondary rectifying unit, and a secondary filter unit, and the primary rectifying unit is characterized in that a voltage of a pulsating waveform is directly output to the transformer. The adapter according to claim 1. 12. The adapter according to claim 12, wherein the maximum output current allowed in the constant voltage mode of the adapter is determined based on the capacitance of the capacitor in the secondary filter unit. The control unit controls the output of the adapter in the second charging mode by performing bidirectional communication with the charged device.
The adapter according to claim 1, wherein the control unit negotiates a charging mode between the adapter and the charged device by performing bidirectional communication with the charged device. .. The control unit controls the output of the adapter in the second charging mode by performing bidirectional communication with the charged device.
The control unit determines the charging voltage for charging the charged device output from the adapter in the second charging mode by performing bidirectional communication with the charged device.
The control unit adjusts the voltage value of the target voltage so that the voltage value of the target voltage becomes equal to the charging voltage for charging the charged device output from the adapter in the second charging mode. The adapter according to claim 1 or 14, wherein the adapter comprises. The control unit controls the output of the adapter in the second charging mode by performing bidirectional communication with the charged device.
The control unit determines the charging current for charging the charged device output from the adapter in the second charging mode by performing bidirectional communication with the charged device.
The control unit adjusts the current value of the target current so that the current value of the target current becomes equal to the charging current for charging the charged device output from the adapter in the second charging mode. The adapter according to any one of claims 1 to 15, wherein the adapter comprises. The control unit controls the output of the adapter in the second charging mode by performing bidirectional communication with the charged device.
Claims 1 to 1, wherein, in the process of charging in the second charging mode, the control unit adjusts the output current of the adapter by performing bidirectional communication with the charged device. The adapter according to any one of 16. The charge control method used for the adapter,
By converting the input alternating current, the output voltage and output current of the adapter can be obtained.
By detecting the output voltage of the adapter, a voltage feedback signal indicating whether or not the output voltage of the adapter has reached a predetermined target voltage is generated.
By detecting the output current of the adapter, a current feedback signal indicating whether or not the output current of the adapter has reached a predetermined target current is generated, and the voltage feedback signal is the output voltage of the adapter. When the target voltage is reached, or when the current feedback signal indicates that the output current of the adapter has reached the target current, the output voltage and output current of the adapter are stabilized.
Including
The target voltage and the target current are adjusted in real time according to the state of the battery of the device to be charged.
The adapter can operate in the first charging mode, which is a constant voltage mode. In the constant voltage mode, the target voltage is a voltage corresponding to the constant voltage mode, and the target current is the constant voltage of the adapter. The maximum output current allowed in the mode,
The power adjustment unit adjusts the output voltage of the adapter to a voltage corresponding to the constant voltage mode based on the voltage feedback signal, and the current feedback signal is the output current of the adapter in the constant voltage mode of the adapter. When indicating that the maximum allowable output current has been reached, the output current of the adapter is configured to be controlled so as not to exceed the maximum output current allowed in the constant voltage mode of the adapter.
The adapter can operate in a second charging mode, which is a constant current mode, in which the target voltage is the maximum output voltage allowed in the constant current mode of the adapter, and the target current is It is a current corresponding to the constant current mode.
The power adjustment unit adjusts the output current of the adapter to a current corresponding to the constant current mode based on the current feedback signal, and the voltage feedback signal is the output voltage of the adapter and the output voltage of the adapter is the constant current mode of the adapter. When the maximum output voltage allowed in the adapter is reached, the output voltage of the adapter is controlled so as not to exceed the maximum output voltage allowed in the constant current mode of the adapter.
The adapter further comprises a charging interface, the adapter communicates bidirectionally with the device to be charged via the data line of the charging interface, and the adapter can operate in a first charging mode and a second charging mode. The charging speed for the device to be charged in the second charging mode is faster than the charging speed for the device to be charged in the first charging mode, the adapter includes a control unit, and the adapter is connected to the device to be charged. A charging control method, characterized in that the control unit controls the output of the adapter in the second charging mode by performing bidirectional communication with the charged device. Generating a voltage feedback signal by detecting the output voltage of the adapter is
To generate a first voltage by dividing the output voltage of the adapter based on a predetermined voltage division ratio,
Comparing the first voltage and the first reference voltage,
Including generating the voltage feedback signal based on the result of comparison between the first voltage and the first reference voltage.
The charge control method is
The charge control method according to claim 18, further comprising adjusting the value of the target voltage by adjusting the voltage division ratio. Generating a current feedback signal by detecting the output current of the adapter is
By sampling the output current of the adapter to obtain a third voltage indicating the magnitude of the output current of the adapter,
To generate a second voltage by dividing the third voltage based on a predetermined voltage division ratio,
Comparing the second voltage with the second reference voltage,
Including generating the current feedback signal based on the result of comparison between the second voltage and the second reference voltage.
The charge control method is
The charge control method according to claim 18, further comprising adjusting the current value of the target current by adjusting the voltage division ratio. The adapter can operate in the first charging mode and the second charging mode.
The charge control method is
18. The charge control method according to any one of 20 to 20. The adapter can operate in the first charging mode, which is a constant voltage mode. In the constant voltage mode, the target voltage is a voltage corresponding to the constant voltage mode, and the target current is the constant voltage of the adapter. The maximum output current allowed in the mode,
The charge control method is
Further comprising adjusting the output voltage of the adapter to the voltage corresponding to the constant voltage mode based on the voltage feedback signal.
When the voltage feedback signal indicates that the output voltage of the adapter has reached the target voltage, or when the current feedback signal indicates that the output current of the adapter has reached the target current, the output voltage of the adapter. And stabilizing the output current
If the current feedback signal indicates that the output current of the adapter has reached the maximum output current allowed in the constant voltage mode of the adapter, then the output current of the adapter is allowed in the constant voltage mode of the adapter. The charge control method according to any one of claims 18 to 21, comprising controlling so as not to exceed the maximum output current.

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