JPS6410844B2 - - Google Patents
Info
- Publication number
- JPS6410844B2 JPS6410844B2 JP11149279A JP11149279A JPS6410844B2 JP S6410844 B2 JPS6410844 B2 JP S6410844B2 JP 11149279 A JP11149279 A JP 11149279A JP 11149279 A JP11149279 A JP 11149279A JP S6410844 B2 JPS6410844 B2 JP S6410844B2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- voltage
- power supply
- stabilized power
- detection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000001514 detection method Methods 0.000 claims description 22
- 230000003321 amplification Effects 0.000 claims description 6
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Landscapes
- Control Of Voltage And Current In General (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
Description
【発明の詳細な説明】
本発明は直流安定化電源装置の制御，保護用の
集積回路に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an integrated circuit for controlling and protecting a DC stabilized power supply device.
従来、直流安定化電源装置の保護回路は個別部
品、あるいは集積化された保護回路で構成され、
誤差増幅回路とは別の集積回路に構成され、夫々
の電源は安定化電源として夫々の集積回路に内蔵
していた。この為、誤差増幅回路の基準電圧と保
護回路の基準電圧との相対比が部品偏差等により
バラツキが生じる為、直流安定化電源装置の出力
電圧の調整と、保護回路の検出電圧の調整とを別
個に行わなければならず多大な調整時間を要する
という欠点があつた。更に誤差増幅回路と保護回
路を別個の部品で構成する為、信頼度の低下、部
品点数の増加、高価格化という欠点があつた。 Traditionally, protection circuits for DC stabilized power supplies are composed of individual components or integrated protection circuits.
The error amplifier circuit was configured in an integrated circuit separate from the error amplifier circuit, and each power supply was built into each integrated circuit as a stabilized power supply. For this reason, since the relative ratio between the reference voltage of the error amplifier circuit and the reference voltage of the protection circuit varies due to component deviation, etc., it is necessary to adjust the output voltage of the DC stabilized power supply and the detection voltage of the protection circuit. This has the disadvantage that it has to be done separately and requires a lot of adjustment time. Furthermore, since the error amplification circuit and the protection circuit are constructed from separate parts, there are drawbacks such as lower reliability, increased number of parts, and higher price.
本発明は従来のもののこのような欠点を除去
し、直流安定化電源装置の信頼度の向上、低価格
化、部品点数の削減、調整時間の短縮を計るもの
である。 The present invention eliminates these drawbacks of the conventional power supply and aims to improve the reliability, lower the price, reduce the number of parts, and shorten the adjustment time of the DC stabilized power supply.
本発明の直流安定化電源装置用集積回路は、直
流安定化電源装置の制御用誤差増幅回路と保護用
過電圧検出回路および低電圧検出回路とを一つの
集積回路素子内に構成し、前記増幅回路および２
つの検出回路に加える基準電圧を前記集積回路素
子内の同一電圧源から各々分圧して供給し、か
つ、前記増幅回路および２つの検出回路の比較用
入力を前記直流安定化電源装置の出力電圧の分圧
抵抗の分圧点から共通に入力したことを特徴とす
る。 The integrated circuit for a DC stabilized power supply device of the present invention comprises a control error amplification circuit, a protective overvoltage detection circuit, and a low voltage detection circuit of the DC stabilization power supply device in one integrated circuit element, and the amplifier circuit and 2
The reference voltage applied to the two detection circuits is divided and supplied from the same voltage source in the integrated circuit element, and the comparison inputs of the amplifier circuit and the two detection circuits are connected to the output voltage of the DC stabilized power supply. It is characterized by a common input from the voltage dividing point of the voltage dividing resistor.
本発明の実施例について図面を参照して説明す
る。図に於いて、Ａ１，Ｃ１，Ｃ２は同一の集積
回路素子内に内蔵された誤差増幅回路、過電圧検
出回路、低電圧検出回路である。Ｒ１〜Ｒ６はこ
の集積回路素子内の、安定化電源ACからＡ１，
Ｃ１及びＣ２に所定の基準電圧VREF Ａ１，
VREF Ｃ１及びVREF Ｃ２を供給するブリーダ
抵抗である。VOUTは直流安定化電源装置の出
力電圧であり、Ｒ７，VR及びＲ８はそれを検出
するブリーダ抵抗である。VRの中点の電位Ｖは
誤差増幅回路Ａ１、過電圧検出回路Ｃ１及び低電
圧検出回路Ｃ２の入力に接続されている。今、直
流安定化電源装置が正常に動作しているものとす
ると、検出電圧Ｖと誤差増幅回路Ａ１の基準電圧
VREF Ａ１とはほぼ等しい。この時何等かの障
害により出力電圧VOUTが上昇又は下降した場
合、過電圧検出回路の基準電圧VREF Ｃ１と、
あるいは低電圧検出回路の基準電圧VREF Ｃ２
と検出電圧Ｖが等しくなつた時、過電圧あるいは
低電圧が検出される。この場合、基準電圧VREF
Ａ１，VREF Ｃ１及びVREF Ｃ２をブリーダ抵
抗Ｒ１〜Ｒ６で一次的な関係に設定しておけば、
出力電圧VOUTが異常な電圧になつても正常時
の出力電圧に対しブリーダ抵抗Ｒ１〜Ｒ６で設定
された電圧において検出回路が動作する。 Embodiments of the present invention will be described with reference to the drawings. In the figure, A1, C1, and C2 are an error amplification circuit, an overvoltage detection circuit, and a low voltage detection circuit built into the same integrated circuit element. R1 to R6 are A1, from the stabilized power supply AC in this integrated circuit element.
C1 and C2 have a predetermined reference voltage VREF A1,
A bleeder resistor that supplies VREF C1 and VREF C2. VOUT is the output voltage of the DC stabilized power supply, and R7, VR and R8 are bleeder resistors that detect it. The potential V at the middle point of VR is connected to the inputs of the error amplifier circuit A1, the overvoltage detection circuit C1, and the low voltage detection circuit C2. Now, assuming that the DC stabilized power supply is operating normally, the detection voltage V and the reference voltage of the error amplifier circuit A1 are
Almost equal to VREF A1. At this time, if the output voltage VOUT rises or falls due to some kind of fault, the reference voltage VREF C1 of the overvoltage detection circuit and
Or the reference voltage VREF C2 of the low voltage detection circuit
When the detection voltage V and the detection voltage V become equal, overvoltage or undervoltage is detected. In this case, the reference voltage VREF
If A1, VREF C1 and VREF C2 are set in a linear relationship with bleeder resistors R1 to R6,
Even if the output voltage VOUT becomes an abnormal voltage, the detection circuit operates at a voltage set by the bleeder resistors R1 to R6 with respect to the normal output voltage.
従つてブリーダ抵抗Ｒ１〜Ｒ６を適当な関係に
設定しておけび保護回路の検出電圧を改めて調整
する必要はなく、また基準電圧VREF Ａ１，
VREF Ｃ１及びVREF Ｃ２の相対比はブリーダ
抵抗Ｒ１〜Ｒ６の相対比のみで決定される為集積
回路素子内の抵抗でも十分に精度よく設定でき、
低価格な保護回路を構成できる。また誤差増幅回
路と保護回路を同一集積回路素子内に内蔵するこ
とにより部品点数の減少及び信頼度が向上する。 Therefore, there is no need to set the bleeder resistors R1 to R6 in an appropriate relationship and adjust the detection voltage of the protection circuit again, and the reference voltage VREF A1,
Since the relative ratio of VREF C1 and VREF C2 is determined only by the relative ratio of the bleeder resistors R1 to R6, it can be set with sufficient accuracy even with the resistance inside the integrated circuit element.
A low-cost protection circuit can be constructed. Further, by incorporating the error amplification circuit and the protection circuit in the same integrated circuit element, the number of parts can be reduced and reliability can be improved.
本発明にによれば、以上説明したように、直流
安定化電源装置の信頼度の向上、低価格化、部品
点数の削減、調整時間の短縮を計ることができ
る。 According to the present invention, as described above, it is possible to improve the reliability of the DC stabilized power supply device, lower the price, reduce the number of parts, and shorten the adjustment time.
第１図は本発明の一実施例を示す回路図であ
る。
Ｒ１〜Ｒ８……抵抗、VR……可変抵抗器、Ａ
１……誤差増幅回路、Ｃ１……過電圧検出回路、
Ｃ２……低電圧検出回路。
FIG. 1 is a circuit diagram showing an embodiment of the present invention. R1 to R8...Resistance, VR...Variable resistor, A
1...Error amplification circuit, C1...Overvoltage detection circuit,
C2...Low voltage detection circuit.
Claims (1)
保護用過電圧検出回路および低電圧検出回路とを
一つの集積回路素子内に構成し、前記増幅回路お
よび２つの検出回路に加える基準電圧を前記集積
回路素子内の同一電圧源から各々分圧して供給
し、かつ、前記増幅回路および２つの検出回路の
比較用入力を前記直流安定化電源装置の出力電圧
の分圧抵抗の分圧点から共通に入力したことを特
徴とする直流安定化電源装置用集積回路。1 A control error amplification circuit, a protective overvoltage detection circuit, and a low voltage detection circuit of a DC stabilized power supply device are configured in one integrated circuit element, and a reference voltage applied to the amplifier circuit and two detection circuits is configured in the integrated circuit element. Each voltage is divided and supplied from the same voltage source in the circuit element, and the comparison inputs of the amplifier circuit and the two detection circuits are commonly connected to a voltage dividing point of the voltage dividing resistor of the output voltage of the DC stabilized power supply. An integrated circuit for a DC stabilized power supply device characterized by input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11149279A JPS5635225A (en) | 1979-08-30 | 1979-08-30 | Direct current stabilizing power supply unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11149279A JPS5635225A (en) | 1979-08-30 | 1979-08-30 | Direct current stabilizing power supply unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5635225A JPS5635225A (en) | 1981-04-07 |
| JPS6410844B2 true JPS6410844B2 (en) | 1989-02-22 |
Family
ID=14562635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11149279A Granted JPS5635225A (en) | 1979-08-30 | 1979-08-30 | Direct current stabilizing power supply unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5635225A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5923808U (en) * | 1982-07-30 | 1984-02-14 | 日本電気株式会社 | power circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5521131Y2 (en) * | 1975-01-24 | 1980-05-21 |
-
1979
- 1979-08-30 JP JP11149279A patent/JPS5635225A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5635225A (en) | 1981-04-07 |
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