JPH01101183U - - Google Patents
Info
- Publication number
- JPH01101183U JPH01101183U JP19693087U JP19693087U JPH01101183U JP H01101183 U JPH01101183 U JP H01101183U JP 19693087 U JP19693087 U JP 19693087U JP 19693087 U JP19693087 U JP 19693087U JP H01101183 U JPH01101183 U JP H01101183U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- switching transistor
- base
- circuit
- voltage
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims description 8
- 238000004804 winding Methods 0.000 claims description 6
- 230000002265 prevention Effects 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 claims description 3
- 238000009499 grossing Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
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エミツタと前
記直流電源との間に接続された電流検出抵抗と、 ベースが前記電流検出抵抗の前記スイツチング
トランジスタ側の端子に接続され、エミツタが前
記電流検出抵抗の直流電源側の端子に接続され、
コレクタが前記制御用トランジスタのベースに接
続された過電流防止制御用トランジスタと、 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トランジスタにおいて、 前記スイツチングトランジスタのコレクタと前
記過電流防止制御用トランジスタのベースとの間
に抵抗とコンデンサとの直列回路を接続したこと
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. a constant voltage control error signal forming circuit that supplies an error signal corresponding to the difference between the switching transistor and the control transistor to the base of the control transistor; a current detection resistor connected between the emitter of the switching transistor and the DC power supply; is connected to a terminal of the current detection resistor on the switching transistor side, and an emitter is connected to a terminal of the current detection resistor on the DC power supply side,
A switching transistor comprising: an overcurrent prevention control transistor whose collector is connected to the base of the control transistor; and a startup circuit connected to the base of the switching transistor, wherein the collector of the switching transistor and the overcurrent prevention control transistor A switching regulator characterized in that a series circuit of a resistor and a capacitor is connected between the base of a current prevention control transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19693087U JPH0321195Y2 (en) | 1987-12-25 | 1987-12-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19693087U JPH0321195Y2 (en) | 1987-12-25 | 1987-12-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01101183U true JPH01101183U (en) | 1989-07-07 |
| JPH0321195Y2 JPH0321195Y2 (en) | 1991-05-08 |
Family
ID=31487517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19693087U Expired JPH0321195Y2 (en) | 1987-12-25 | 1987-12-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0321195Y2 (en) |
-
1987
- 1987-12-25 JP JP19693087U patent/JPH0321195Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0321195Y2 (en) | 1991-05-08 |