JPH0472881U - - Google Patents
Info
- Publication number
- JPH0472881U JPH0472881U JP11487090U JP11487090U JPH0472881U JP H0472881 U JPH0472881 U JP H0472881U JP 11487090 U JP11487090 U JP 11487090U JP 11487090 U JP11487090 U JP 11487090U JP H0472881 U JPH0472881 U JP H0472881U
- Authority
- JP
- Japan
- Prior art keywords
- switching
- transformer
- voltage
- primary
- transistor
- 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.)
- Pending
Links
- 238000004804 winding Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Dc-Dc Converters (AREA)
Description
第１図はこの考案の実施例に係るスイツチング
レギユレータの回路図、第２図は従来のスイツチ
ングレギユレータの回路図である。
Ｑ１……スイツチングトランジスタ、Ｎ３……
補助巻線、Ｒ１……一次側電流検出抵抗、Ｒ２，
Ｒ３……抵抗回路。
FIG. 1 is a circuit diagram of a switching regulator according to an embodiment of this invention, and FIG. 2 is a circuit diagram of a conventional switching regulator. Q1...Switching transistor, N3...
Auxiliary winding, R1...Primary current detection resistor, R2,
R3...Resistance circuit.
Claims (1)
電流を断続するスイツチングトランジスタと、上
記トランスの一次巻線に流れる電流を検出する一
次側電流検出抵抗と、上記スイツチングトランジ
スタをオンオフ制御するとともに、制御入力電圧
が一定値を越える時、上記スイツチングトランジ
スタのオンデユーテイ比を制御して過電流保護を
行うスイツチング制御回路とを有するスイツチン
グレギユレータにおいて、 上記トランスに入力電圧検出用の補助巻線を設
け、この補助巻線の出力電圧の比例成分を上記一
次側電流検出抵抗の降下電圧に加えて合成電圧信
号を生成するとともに上記スイツチング制御回路
の制御入力端子に上記合成電圧信号を与える抵抗
回路を設けたことを特徴とするスイツチングレギ
ユレータ。[Claims for Utility Model Registration] A transformer, a switching transistor that switches on and off the current flowing through the primary winding of the transformer, a primary current detection resistor that detects the current flowing through the primary winding of the transformer, and the switching transistor that detects the current that flows through the primary winding of the transformer. In a switching regulator, the switching regulator has a switching control circuit that controls on/off of the transistor and also controls the on-duty ratio of the switching transistor to provide overcurrent protection when the control input voltage exceeds a certain value. An auxiliary winding for voltage detection is provided, and a proportional component of the output voltage of this auxiliary winding is added to the voltage drop of the primary current detection resistor to generate a composite voltage signal, and the voltage is applied to the control input terminal of the switching control circuit. A switching regulator characterized by being provided with a resistor circuit that provides a composite voltage signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11487090U JPH0472881U (en) | 1990-10-31 | 1990-10-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11487090U JPH0472881U (en) | 1990-10-31 | 1990-10-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0472881U true JPH0472881U (en) | 1992-06-26 |
Family
ID=31862591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11487090U Pending JPH0472881U (en) | 1990-10-31 | 1990-10-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0472881U (en) |
-
1990
- 1990-10-31 JP JP11487090U patent/JPH0472881U/ja active Pending
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