JP6589465B2 - Lighting device and lighting device - Google Patents

Description

  The present invention relates to a lighting device and a lighting device.

  Conventionally, for example, as disclosed in Patent Documents 1 and 2 below, a step-up chopper circuit (so-called PFC circuit) having a power factor correction function and a DC-DC converter (so-called so-called PFC circuit) that steps down the output voltage of the PFC circuit. A lighting device that lights an LED module using a back converter is known. Further, in the lighting device for a fluorescent lamp disclosed in Patent Document 2 below, the control circuit for the boost chopper circuit and the control circuit for the inverter circuit are provided as one integrated circuit.

JP 2007-202285 A Japanese Patent No. 4460202

  As described above, a control IC having a control function for both of the plurality of converter circuits requires a terminal for inputting / outputting a signal to / from each converter circuit, so that the number of terminals increases. Along with this, the number of wirings to be routed around the control IC also increases, so it becomes a problem how to lay out circuits and wirings in a limited space on the substrate. However, in the lighting device including the control IC as described above, the guidelines for how to perform terminal positions and wiring routing are not described in Patent Document 2, and the conventional technology still has room for improvement. It was a thing.

  The present invention has been made to solve the above-described problems, and in a control IC having a control function for a plurality of converter circuits, the lighting device improved so as not to complicate the wiring pattern layout on the substrate And it aims at providing an illuminating device.

Lighting device according to the present invention includes a substrate having a surface, a first converter circuit provided on said surface, disposed on said surface, and a second converter circuit connected to the first converter circuit, the said surface a control power supply circuit provided, disposed on said surface, a first terminal group to be connected to is constituted by a plurality of adjacent terminal said first converter circuit, is composed of a plurality of adjacent terminal said second converter comprising a second terminal group to be connected to the circuit, and a control IC having a third terminal to be connected to the control power circuit, the substrate, the power which lies opposite each other on the surface having an input terminal and power output terminal, said first converter circuit between the power output terminal and the power input terminal, the control IC, and the said second converter circuit arrangement in this order, before Symbol Provided on a surface, a first wiring group connected to the first converter circuit extending from each of the first terminal group to the side of the power input terminal, provided on the surface, the power from each of the second terminal group A second wiring group extending to the output terminal side and connected to the second converter circuit; and a third wiring provided on the surface and extending from the third terminal and connected to the control power circuit; The control power supply circuit is arranged closer to the control IC than the first converter circuit and the second converter circuit . The illuminating device concerning this invention is equipped with the said lighting device and a light source module.

  According to the present invention, in the control IC having a control function for both the first and second converter circuits, the circuit layout on the substrate and the terminal arrangement are adapted, so that the wiring pattern layout on the substrate can be optimized.

It is a circuit layout figure which shows the lighting device concerning embodiment of this invention. It is a circuit diagram which shows the lighting device concerning embodiment of this invention. It is a circuit layout figure which shows the modification of the lighting device concerning embodiment of this invention. It is a circuit layout figure which shows the modification of the lighting device concerning embodiment of this invention. It is a circuit layout figure which shows the modification of the lighting device concerning embodiment of this invention. It is a circuit layout figure which shows the modification of the lighting device concerning embodiment of this invention. It is a circuit layout figure which shows the modification of the lighting device concerning embodiment of this invention. It is a circuit layout figure which shows the comparative example with respect to embodiment. It is a circuit layout figure which shows the modification of the lighting device concerning embodiment of this invention. It is a circuit diagram which shows the modification of the lighting device concerning embodiment of this invention. It is a circuit layout figure which shows the modification of the lighting device concerning embodiment of this invention. It is a circuit diagram which shows the modification of the lighting device concerning embodiment of this invention.

  FIG. 1 is a circuit layout diagram showing a lighting device 50 according to an embodiment of the present invention. The AC power supply 13 and the light source module 12 are connected to the lighting device 50. The lighting device (lighting fixture) according to the present invention is provided by the lighting device 50 and the light source module 12 that is lit thereby. The lighting device 50 includes a substrate 1 having a surface 1a. The surface 1a is a mounting surface on which components constituting the lighting device are mounted. FIG. 1 is a plan view of the component mounting surface of the substrate 1, in other words, a view of the substrate 1 as a solder surface. On the surface 1a, a power input terminal 10, for example, a diode bridge rectifier circuit 2, a PFC (Power Factor Correction) circuit 3, a buck converter circuit 4, a control IC 9, a control power supply circuit 5, and a power output terminal 11 are provided. Yes. The power input terminal 10 and the power output terminal 11 are located on the opposite sides on the surface 1a. Between the power input terminal 10 and the power output terminal 11, the rectifier circuit 2, the PFC circuit 3, the control IC 9, and the buck converter circuit 4 are arranged in this order.

  The control IC 9 includes first terminal groups 9a1 to 9a4 configured by a plurality of adjacent terminals, and second terminal groups 9b1 to 9b4 configured by a plurality of adjacent terminals. “Adjacent” means that each terminal group is located together without including other terminals between the terminals. The first terminal groups 9a1 to 9a4 are provided closer to the PFC circuit 3 than the second terminal groups 9b1 to 9b4. The second terminal groups 9b1 to 9b4 are provided closer to the buck converter circuit 4 than the first terminal groups 9a1 to 9a4. Specifically, the first terminal groups 9a1 to 9a4 are assigned to the left half of the first long side 93 of the control IC 9. The second terminal groups 9b1 to 9b4 are assigned to the right half of the first long side 93 of the control IC 9.

  The “closeness” of the terminal group with respect to the circuit can be compared as follows, for example. In FIG. 1, the terminal 9a4 farthest from the PFC circuit 3 in the first terminal groups 9a1 to 9a4 and the terminal 9b1 closest to the PFC circuit 3 in the second terminal groups 9b1 to 9b4 will be compared. In this case, when the shortest distance is compared in the plan view of the surface 1a, the terminal 9a4 is closer to the PFC circuit 3 than the terminal 9b1, so the first terminal group 9a1 to 9a4 is more PFC circuit 3 than the second terminal group 9b1 to 9b4. It will be near. Similarly, the terminal 9b1 farthest from the buck converter circuit 4 in the second terminal groups 9b1 to 9b4 and the terminal 9a4 closest to the buck converter circuit 4 in the first terminal groups 9a1 to 9a4 will be compared. In this case, when the shortest distance is compared in a plan view of the surface 1a, the terminal 9b1 is closer to the buck converter 4 than the terminal 9a4. Therefore, the second terminal groups 9b1 to 9b4 are more buck converter circuits than the first terminal groups 9a1 to 9a4. It can be said that it is provided near 4. Since the first terminal groups 9a1 to 9a4 are adjacent to each other and the second terminal groups 9b1 to 9b4 are also adjacent to each other, the relationship between the terminals at the extreme end of the two may be compared as described above.

  On the surface 1a, there are provided first wiring groups 7a to 7d composed of a plurality of wirings and second wiring groups 8a to 8d composed of a plurality of wirings. The first wiring groups 7 a to 7 d extend from the first terminal groups 9 a 1 to 9 a 4 to the power input terminal 10 side and are connected to the PFC circuit 3. The second wiring groups 8 a to 8 d extend from the second terminal groups 9 b 1 to 9 b 4 to the power output terminal 11 side and are connected to the buck converter circuit 4. The first wiring groups 7 a to 7 d and the second wiring groups 8 a to 8 d do not intersect in the plan view of the substrate 1. “Do not intersect” not only means that they intersect in the same plane, that is, do not join, but also means that the substrate 1 does not intersect three-dimensionally when viewed in plan, as will be described later in the comparative example of FIG.

  The control IC 9 includes third terminal groups 9c1 to 9c2. The third terminal groups 9c1 to 9c2 are provided closer to the control power supply circuit 5 than the first terminal groups 9a1 to 9a4 and the second terminal groups 9b1 to 9b4. The third wirings 25a and 25b extend from the third terminal groups 9c1 to 9c2 to the power output terminal 11 side without crossing the first and second wiring groups 8a to 8d in a plan view of the substrate 1, and control power supply circuits 5 is connected.

  The control IC 9 has a rectangular outer shape and has four sides. The four sides include a first short side 91 facing the power input terminal 10, a second short side 92 facing the power output terminal 11, one end of the first short side 91, and a second short side 92. And a second long side 94 connecting the other end of the first short side 91 and the other end of the second short side 92. In the embodiment, as shown in FIG. 1, the first and second terminal groups 9 a 1 to 9 a 4 and 9 b 1 to 9 b 4 are arranged on the first long side 93. Third terminal groups 9c1 to 9c2 are arranged on the control power supply circuit 5 side of the second long side 94.

  In the embodiment, as an example, the control IC 9 is a digital / analog composite IC package. This generates a drive signal for a digital chip provided with a digital arithmetic circuit such as a microcomputer or DSP (Digital Signal Processor) in the package of the control IC 9 and switching elements Q1 and Q2 of the PFC circuit 3 and the buck converter circuit 4. An analog chip provided with an analog circuit such as a drive circuit (including the driver 34) is accommodated. These configurations are not shown in FIG.

  FIG. 2 is a circuit diagram showing the lighting device 50 according to the embodiment of the present invention. FIG. 2 also shows circuits, terminals, and wirings that are omitted from the layout diagram of FIG. 1 for convenience of explanation. As an example, the light source module 12 includes a plurality of solid state light emitting devices connected in series. The solid light-emitting element is an inorganic LED element or an organic EL element (OLED). When the control IC 9 is provided with other terminals that do not belong to these terminal groups other than the first to third terminal groups 9a1 to 9c2 shown in FIG. 1, these other terminals are the first terminal groups 9a1 to 9a4, Between the terminal groups of the two-terminal groups 9b1 to 9b4 and the third terminal groups 9c1 to 9c2, or among the four sides of the control IC 9, they are arranged at locations away from these terminal groups.

  The lighting device 50 includes a rectifier circuit 2, a PFC circuit 3, a buck converter circuit 4, and a control IC 9 that are diode bridges. The PFC circuit 3 includes a choke coil L1, a switching element Q1, and a diode D1. The output voltage of the PFC circuit 3 is applied to the capacitor C1.

  The PFC circuit 3 is connected to the buck converter circuit 4 via the wiring 6a and the wiring 6b. The buck converter circuit 4 includes a switching element Q2. The switching element Q2 includes a first electrode a, a second electrode b, and a control electrode c that controls conduction between the first electrode a and the second electrode b. The first electrode a is connected to the positive electrode of the capacitor C1 and the cathode of the diode D1, and is electrically connected to the rectifier circuit 2 via the diode D1. The switching element Q2 is, for example, a MOSFET. When the switching element Q2 is a MOSFET, the first electrode a is a drain electrode, the second electrode b is a source electrode, and the control electrode c is a gate electrode. The buck converter circuit 4 includes a switching element Q2, a diode D2, a choke coil L2, and a capacitor C2.

  The buck converter circuit 4 is provided with a bootstrap capacitor C3 and a Zener diode D3. The bootstrap capacitor C3 is provided to make the control electrode c of the switching element Q2 higher by, for example, 15V than the second electrode b. The bootstrap capacitor C3 is charged to 15V by connecting the Zener diode D3 in parallel to the bootstrap capacitor C3.

  The control power supply circuit 5 includes a capacitor C50 and a choke coil. The control power supply circuit 5 is connected to the DCDC_S terminal to DCDC_FB1 terminal of the control IC 9. One end of the choke coil is connected to the source S of an IPD (intelligent power device) 36 via a DCDC_S terminal, thereby forming a step-down chopper circuit. The capacitor C50 is charged with the voltage appearing at the other end of the choke coil. For example, a control power supply voltage of about 15 V can be extracted from the capacitor C50.

  The control IC 9 controls the PFC circuit 3 and the buck converter circuit 4. On the side of the control IC 9, a plurality of terminals included in the first to third terminal groups 9a1 to 9c2 in FIG. 1 are formed.

  First, the terminals provided on the PFC circuit 3 side will be described. The Vin terminal is a detection terminal used for input voltage detection of the PFC circuit 3. The PFC_ZCD terminal is a detection terminal that is connected to the secondary winding of the choke coil L <b> 1 and is used for zero cross detection of the current flowing through the PFC circuit 3. The PFC_I terminal is a detection terminal used for overcurrent detection of the PFC circuit 3. The PFC_DR terminal is an output terminal that outputs a gate signal for driving the switching element Q1 of the PFC circuit 3. The PFC_V terminal is also used as a DCDC_Vin terminal and a VBin terminal, and is a detection terminal used for feedback control of the PFC circuit 3, overvoltage detection of the PFC circuit, and PFC_feedback loop abnormality detection. Of the terminals constituting the first terminal groups 9a1 to 9a4, the terminal 9a1 corresponds to the PFC_ZCD terminal, the terminal 9a2 corresponds to the PFC_I terminal, the terminal 9a3 corresponds to the PFC_DR terminal, and the terminal 9a4 corresponds to the PFC_V terminal. ing. Note that a terminal corresponding to the Vin terminal may be added to the first terminal group. Of the above terminals, the PFC_DR terminal is essential, but the other detection terminals can be omitted or changed as appropriate. For example, the PFC_ZCD terminal may be omitted, and only one of the PFC_I terminal and the PFC_V terminal may be included as a detection terminal. In addition, the above relationship is based on the arrangement order of the terminals 9a1 to 9a4 shown in FIG. 1 (terminals 9a1 and 9a4 are located at both ends, and terminals 9a2 and 9a3 are located therebetween) from the viewpoint of obtaining a terminal layout optimized for the circuit pattern. The layout of FIG. 2 is applied as it is. However, the present invention is not necessarily limited to this, and how the terminals of FIG. 2 are associated with the terminals 9a1 to 9a4 may be variously modified.

  Next, terminals provided on the buck converter circuit 4 side will be described. The VB terminal charges the bootstrap capacitor C3 in order to drive the high-side drive switching element Q2. The LED_DR terminal is an output terminal that outputs a gate signal for driving the switching element Q2 of the buck converter circuit 4. The VS terminal is a terminal that supplies a reference potential (specifically, a source potential in FIG. 2) of the switching element Q2 that is driven on the high side. The LED_ZCD terminal is a detection terminal that is connected to the secondary winding of the choke coil L <b> 2 and is used for zero cross detection of the current flowing through the buck converter circuit 4. The LED_I terminal is a detection terminal used for LED current detection and output overcurrent detection for feedback control of the LED current. The LED_V terminal is a detection terminal that detects output overvoltage and detects whether or not the light source module 12 is connected. Of the terminals constituting the second terminal groups 9b1 to 9b4, the terminal 9b1 corresponds to the VB terminal, the terminal 9b2 corresponds to the LED_DR terminal, the terminal 9b3 corresponds to the VS terminal, and the terminal 9b4 corresponds to the LED_ZCD terminal. ing. Note that terminals corresponding to the LED_I terminal and the LED_V terminal may be added to the second terminal groups 9b1 to 9b4. In this case, two terminals are arranged next to the terminal 9b4. Further, among the above terminals, the LED_DR terminal is essential, but the other detection terminals can be appropriately omitted or changed. For example, the LED_ZCD terminal may be omitted, and only one of the LED_I terminal and the LED_V terminal may be included as a detection terminal. Further, the above relationship is based on the arrangement order of the terminals 9b1 to 9b4 shown in FIG. 1 (terminals 9b1 and 9b4 are located at both ends, and terminals 9b2 and 9b3 are located between them) from the viewpoint of obtaining a terminal layout optimized for the circuit pattern. The layout of FIG. 2 is applied as it is. However, the present invention is not necessarily limited thereto, and how the terminals 9b1 to 9b4 are associated with the VB to LED_ZCD terminals in FIG. 2 may be variously modified.

  The VB terminal is connected to one end of the bootstrap capacitor C3, and the VS terminal is connected to the other end of the bootstrap capacitor C3. The other end of the bootstrap capacitor C3 and the VS terminal are connected to the second electrode b of the switching element Q2. The LED_DR terminal is connected to the control electrode c of the switching element Q2.

  Next, terminals provided on the second long side 94 side of the control IC 9 will be described. The Dim_in terminal is connected to the dimmer 61 outside the lighting device 50 via the dimming interface circuit 60. The GND1 (SIG) terminal is a terminal to be connected to the ground potential, and is for a small signal ground. The GND2 (PW) terminal is a terminal to be connected to the ground potential and is for power ground. The DCDC_S terminal is connected to the source S of the MOSFET built in the control power supply IC unit 95. The DCDC_FB1 terminal is a feedback terminal of the control power supply IC unit 95. The DCDC_FB2 terminal is a feedback terminal for the control power supply IC unit 95. The Vcc1 terminal is connected to the capacitor C50, and is a terminal to which, for example, 10V to 20V, for example, 15V is input as the first control power supply voltage.

  For example, 5 V is applied to the Vcc2 terminal as the second control power supply voltage. The second control power supply voltage is generated by stepping down the first control power supply voltage by the regulator REG. The 5 V applied to the Vcc2 terminal is used as a power source for operating a microcomputer or the like built in the control IC 9.

  Of the terminals constituting the third terminal groups 9c1 to 9c2, the terminal 9c1 corresponds to the DCDC_S terminal, and the terminal 9c2 corresponds to the Vcc1 terminal. Note that terminals corresponding to the DCDC_FB1 terminal to the Vcc2 terminal may be added to the third terminal group. In this case, these terminals are further arranged around the terminals 9c1 to 9c2.

  A configuration in the control IC 9 will be described. Although many elements are provided in the control IC 9, FIG. 1 mainly shows elements related to on / off of the switching element Q2. The control IC 9 includes a constant current source 32 connected to the PFC_V terminal, a diode D4 whose anode is connected to the constant current source 32, and an activation switching element Q3 whose drain is connected to the cathode of the diode D4. The source of the startup switching element Q3 is connected to the VB terminal. The constant current source 32 keeps the output current constant. The output current of the constant current source 32 is 1 mA, for example. The activation switching element Q3 is formed of, for example, a MOSFET. An impedance variable element other than a MOSFET may be used as the startup switching element Q3.

  A driver 34 is provided in the control IC 9. The driver 34 is connected to the VB terminal, the LED_DR terminal, and the VS terminal. The driver 34 applies a voltage (15V) to the control electrode c when the bootstrap capacitor C3 is charged and the potential difference between the VB terminal and the VS terminal becomes 15V.

  A point on the path connecting the rectifier circuit 2 and the first electrode a is defined as a first connection point P1. The first connection point P1 is connected to the PFC_V terminal. The bootstrap capacitor C3 is provided so as to electrically connect the first connection point P1 and the second electrode b.

  The control IC 9 includes an IPD 36. The IPD 36 is connected to a path connecting the PFC_V terminal and the constant current source 32. A point on the path connecting the starting switching element Q3 and the bootstrap capacitor C3 is defined as a second connection point P2. The IPD 36 applies a voltage lower than the voltage at the first connection point P1 to the second connection point P2. For example, a DC voltage 100V at the first connection point P1 is applied to the IPD 36 via the PFC_V terminal, and the IPD 36 generates a voltage (for example, 15V) lower than the voltage at the first connection point P1 from this voltage, Apply to connection point P2. Specifically, the output of the IPD 36 is applied to the second connection point P2 via a terminal written as DCDC_S, a choke coil (inductor) external to the control IC 9, a terminal written as Vcc1, and a diode D5. The

  There is a control unit 40 in the control IC 9. The control unit 40 issues a signal for turning on and off the activation switching element Q3 to the activation switching element Q3. The control unit 40 and the IPD 36 described above may be dedicated hardware or a CPU that executes a program stored in a memory. Note that power for the control unit 40 and the driver 34 is supplied from the IPD 36.

  In order to protect the above-described components, it is preferable to provide an enclosure that covers the control IC 9 including the bootstrap capacitor C3, the startup switching element Q3, the IPD 36, the control unit 40, and the like. The outer enclosure is, for example, a resin.

  FIG. 8 is a circuit layout diagram showing a comparative example with respect to the embodiment. The lighting device 150 according to the comparative example illustrated in FIG. 8 is obtained by replacing the positions of the first terminal groups 9a1 to 9a4 and the second terminal groups 9b1 to 9b4 in the lighting device 50 illustrated in FIG. In this case, the first terminal groups 9a1 to 9a4 and the second terminal groups 9b1 to 9b4 must be three-dimensionally crossed in a plan view of the substrate 1. For example, the second wiring groups 8a to 8d are through-wired as indicated by broken lines in FIG. It is necessary to make a detour to the back side of the substrate 1 using a hole or the like. In the terminal arrangement shown in the comparative example, the routing of the second wiring groups 8a to 8d becomes complicated. In this respect, according to the lighting device 50 according to the embodiment, since the circuit layout on the substrate 1 and the terminal arrangement of the control IC are adapted, the wiring pattern layout on the substrate 1 can be optimized.

  3 to 7 are circuit layout diagrams showing modifications of the lighting device 50 according to the embodiment of the present invention. As shown in FIG. 3, first terminal groups 9 a 1 to 9 a 4 may be provided on the first short side 91, and second terminal groups 9 b 1 to 9 b 4 may be provided on the second short side 92. As shown in FIG. 4, first terminal groups 9 a 1 to 9 a 4 may be provided on the first long side 93, and second terminal groups 9 b 1 to 9 b 4 may be provided on the second short side 92. 4, the first terminal groups 9a1 to 9a4 may be provided on the first short side 91, and the second terminal groups 9b1 to 9b4 may be provided on the first long side 93. As shown in FIG. 5, a part of the first terminal groups 9 a 1 to 9 a 4 may be provided on the first long side 93, and the rest of the first terminal groups 9 a 1 to 9 a 4 may be provided on the first short side 91. Furthermore, a part of the second terminal groups 9b1 to 9b4 may be provided on the first long side 93, and the rest of the second terminal groups 9b1 to 9b4 may be provided on the second short side 92. As shown in FIG. 6, the third terminal groups 9c1 to 9c2 connected to the control power supply circuit 5 may be provided on the first short side 91 on the PFC circuit 3 side. As shown in FIG. 7, all of the first to third terminals 9 a 1 to 9 c 2 may be provided on the first long side 93.

  FIG. 9 is a circuit layout diagram showing a modification of the lighting device 50 according to the embodiment of the present invention. FIG. 10 is a circuit diagram showing a modification of the lighting device 50 according to the embodiment of the present invention. In FIG. 10, the microcomputer 9m, which is not shown in FIG. 2, is entered. In the modified example of FIG. 9, a communication terminal group 9d composed of a plurality of adjacent terminals connected to the microcomputer 9m is added. The communication terminal group 9d may be provided on the second long side 94, for example. The communication terminal group 9d is connected to the external interface 70 and the fourth wiring group 73, and is used for communication with an external device. In this modification, as an example, the communication terminal group 9d communicates between a digital arithmetic circuit (not shown) such as a microcomputer provided inside the control IC 9 and the additional unit 71 that is an external device. Terminal. A dimming signal (PWM signal) from the dimmer is input to the Dim_in terminal. The Dim_in terminal may be a serial communication terminal for UART (Universal Asynchronous Receiver Transmitter) communication. The UART is a circuit that performs mutual conversion between a serial signal and a parallel signal in an asynchronous manner, and may be incorporated in the control IC 9. Electronic data related to the control of the light source module 12 is transmitted to the microcomputer 9m through the DAT_s terminal. The Pro_W terminal is used for rewriting the program of the microcomputer 9m. The RESET terminal is used to reset the microcomputer 9m. Thereby, erasing, writing and reading of electronic data can be performed on the memory of the microcomputer 9m.

  FIG. 11 is a circuit layout diagram showing a modification of the lighting device 50 according to the embodiment of the present invention. FIG. 12 is a circuit diagram showing a modification of the lighting device 50 according to the embodiment of the present invention. In the modification shown in FIGS. 11 and 12, the control power supply circuit 5 is replaced with a control power supply circuit 52. In the modified examples of FIGS. 11 and 12, the control power supply IC unit 95 may be omitted because the control power supply is acquired through a path different from that of the control power supply circuit 5. Therefore, the control power supply IC unit 95 is not shown in FIG. The control power supply circuit 52 includes a power extraction circuit 53. As an example of the power extraction circuit 53, a diode (not shown) is provided in a direction in which current flows from the secondary winding of the choke coil L2 to the capacitor C50, and a resistor is inserted between the cathode of this diode and the positive electrode of the capacitor C50. It is composed of the circuit. The control power supply is generated by charging the capacitor C50 using the electric power extracted from the secondary winding of the choke coil L2. The control power supply circuit 52 is provided on the surface 1 a on the power output terminal 11 side and next to the buck converter circuit 4. The fourth wiring 73 connects the control power supply circuit 52 and the buck converter circuit 4. In disposing the circuit shown in FIG. 10 on the substrate 1, it is preferable to dispose the control power supply circuit 52 next to the buck converter circuit 4. This facilitates connecting the secondary winding of the choke coil L2 to the control power circuit 52. As a modification of the control power supply circuit 52, a snubber circuit may be connected to a connection point between the source of the switching element Q2 and the choke coil L2, and the capacitor C50 may be charged via the snubber circuit.

DESCRIPTION OF SYMBOLS 1 Board | substrate, 1a surface, 2 Rectifier circuit, 3 PFC circuit, 4 Buck converter circuit, 5, 52 Control power supply circuit, 6a, 6b wiring, 7a-7d 1st wiring group, 8a-8d 2nd wiring group, 9 Control IC , 9a1 to 9a4 first terminal group, 9b1 to 9b4 second terminal group, 9c1 to 9c2 third terminal group, 9d communication terminal group, 9m microcomputer, 10 power input terminal, 11 power output terminal, 12 light source module, 13 AC power supply 25a-25b 3rd wiring, 31 switching element, 32 constant current source, 34 driver, 40 control unit, 50, 150 lighting device, 53 power extraction circuit, 60 dimming interface circuit, 61 dimmer, 70 external interface, 71 Additional unit, 73 4th wiring, 91 1st short side, 92 2nd short side, 93 1st long side, 94 2nd long side 95 Control power supply IC section

Claims (4)

A substrate having a surface;
A first converter circuit provided on the surface;
A second converter circuit provided on the surface and connected to the first converter circuit;
A control power supply circuit provided on the surface;
Provided on the surface, a first terminal group to be connected to is constituted by a plurality of adjacent terminal said first converter circuit, the second to be composed of a plurality of adjacent terminal connected to the second converter circuit A control IC having a terminal group and a third terminal to be connected to the control power supply circuit ;
With
The substrate has a power input terminal and power output terminal located opposite each other on said surface,
The first converter circuit, the control IC, and the second converter circuit are arranged in this order between the power input terminal and the power output terminal ,
Provided in front Symbol surface, a first wiring group connected to the first converter circuit extending from each of the first terminal group to the side of the power input terminal,
Provided on the surface, and a second wire group connected from each said second terminal group to the second converter circuit extending to the side of the power output terminal,
A third wiring provided on the surface and extending from the third terminal and connected to the control power supply circuit;
Further comprising
The control power supply circuit is a lighting device arranged closer to the control IC than the first converter circuit and the second converter circuit . A substrate having a surface;
A first converter circuit provided on the surface;
A second converter circuit provided on the surface and connected to the first converter circuit;
A first terminal group provided on the surface and configured by a plurality of adjacent terminals to be connected to the first converter circuit, and a second terminal group configured by a plurality of adjacent terminals and to be connected to the second converter circuit. A control IC having a terminal group;
With
The substrate has a power input terminal and a power output terminal located on opposite sides of the surface;
The first converter circuit, the control IC, and the second converter circuit are arranged in this order between the power input terminal and the power output terminal,
A first wiring group provided on the surface and extending from each of the first terminal groups toward the power input terminal and connected to the first converter circuit;
A second wiring group provided on the surface and extending from each of the second terminal groups to the power output terminal side and connected to the second converter circuit;
Further comprising
Further comprising a control power circuit provided on the surface on the power output terminal side;
The control IC includes a third terminal provided closer to the control power circuit than the first and second terminal groups,
The third a third wiring connected to the control power supply circuit extending to the side of the power output terminal from the terminal, further comprising Ru point lamp device. A substrate having a surface;
A first converter circuit provided on the surface;
A second converter circuit provided on the surface and connected to the first converter circuit;
A first terminal group provided on the surface and configured by a plurality of adjacent terminals to be connected to the first converter circuit, and a second terminal group configured by a plurality of adjacent terminals and to be connected to the second converter circuit. A control IC having a terminal group;
With
The substrate has a power input terminal and a power output terminal located on opposite sides of the surface;
The first converter circuit, the control IC, and the second converter circuit are arranged in this order between the power input terminal and the power output terminal,
A first wiring group provided on the surface and extending from each of the first terminal groups toward the power input terminal and connected to the first converter circuit;
A second wiring group provided on the surface and extending from each of the second terminal groups to the power output terminal side and connected to the second converter circuit;
Further comprising
The second converter circuit is a buck converter circuit including a choke coil and a secondary winding coupled to the choke coil,
Wherein provided adjacent to the side and the second converter circuit power output terminals, the point light device Ru comprises a control power supply circuit for generating a control power using the power taken out from the secondary winding in said surface.   An illuminating device provided with the lighting device of any one of Claims 1-3.

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