JPH0196782U - - Google Patents
Info
- Publication number
- JPH0196782U JPH0196782U JP19368687U JP19368687U JPH0196782U JP H0196782 U JPH0196782 U JP H0196782U JP 19368687 U JP19368687 U JP 19368687U JP 19368687 U JP19368687 U JP 19368687U JP H0196782 U JPH0196782 U JP H0196782U
- Authority
- JP
- Japan
- Prior art keywords
- base
- switching transistor
- voltage
- transistor
- transformer
- 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 5
- 239000003990 capacitor Substances 0.000 claims description 3
- 238000009499 grossing Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 1
Landscapes
- Dc-Dc Converters (AREA)
Description
第１図は本考案の実施例に係わるスイツチング
レギユレータを示す回路図、第２図は第１図の各
部の電流波形図である。
１……直流電源、２……トランス、３……１次
巻線、４……スイツチングトランジスタ、５……
２次巻線、６……駆動巻線、７……電圧検出巻線
、１０……整流平滑回路、１４……制御用トラン
ジスタ、１５……電圧検出回路、２４……コンデ
ンサ、２５……電流検出用抵抗、２６……過電流
防止制御用トランジスタ、２８……抵抗、２９…
…コンデンサ、３０……起動抵抗。
FIG. 1 is a circuit diagram showing a switching regulator according to an embodiment of the present invention, and FIG. 2 is a current waveform diagram of each part of FIG. 1. 1...DC power supply, 2...Transformer, 3...Primary winding, 4...Switching transistor, 5...
Secondary winding, 6... Drive winding, 7... Voltage detection winding, 10... Rectification and smoothing circuit, 14... Control transistor, 15... Voltage detection circuit, 24... Capacitor, 25... Current Detection resistor, 26... Transistor for overcurrent prevention control, 28... Resistor, 29...
...Capacitor, 30...Starting resistance.
Claims (1)
て接続されたスイツチングトランジスタと、 前記トランスの２次側に設けられた整流平滑回
路と、 前記トランスに電磁結合され、前記スイツチン
グトランジスタのベース・エミツタ間に接続され
たベース駆動巻線と、 前記スイツチングトランジスタのオン時間幅を
制御するために前記スイツチングトランジスタの
ベース・エミツタ間に接続された制御用トランジ
スタと、 前記整流平滑回路の出力電圧又はこの出力電圧
に対応する電圧を検出する電圧検出回路と、 基準電圧源と、 前記電圧検出回路で検出された電圧と前記基準
電圧源で与えられる基準電圧との差に対応する誤
差信号を前記制御トランジスタのベースに供給す
る定電圧制御用誤差信号形成回路と、 前記スイツチングトランジスタのベースに接続
された起動回路と を有するスイツチングレギユレータにおいて、 前記制御用トランジスタのエミツタ・ベース間
にコンデンサを接続し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 switching transistor connected between one end and the other end of a DC power source via a transformer, a rectifying and smoothing circuit provided on the secondary side of the transformer, and an electromagnetic circuit connected to the transformer. a base driving winding connected between the base and emitter of the switching transistor; and a control winding connected between the base and emitter of the switching transistor to control the on-time width of the switching transistor. a transistor; a voltage detection circuit that detects the output voltage of the rectifying and smoothing circuit or a voltage corresponding to the output voltage; a reference voltage source; and a reference voltage provided by the voltage detected by the voltage detection circuit and the reference voltage source. and a starting circuit connected to the base of the switching transistor. A switching regulator characterized by a capacitor connected between the emitter and base of a control transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19368687U JPH0196782U (en) | 1987-12-21 | 1987-12-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19368687U JPH0196782U (en) | 1987-12-21 | 1987-12-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0196782U true JPH0196782U (en) | 1989-06-27 |
Family
ID=31484465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19368687U Pending JPH0196782U (en) | 1987-12-21 | 1987-12-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0196782U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5625378A (en) * | 1979-08-09 | 1981-03-11 | Toshiba Corp | Self-excited forward converter |
-
1987
- 1987-12-21 JP JP19368687U patent/JPH0196782U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5625378A (en) * | 1979-08-09 | 1981-03-11 | Toshiba Corp | Self-excited forward converter |