JPH0468488U - - Google Patents
Info
- Publication number
- JPH0468488U JPH0468488U JP11160690U JP11160690U JPH0468488U JP H0468488 U JPH0468488 U JP H0468488U JP 11160690 U JP11160690 U JP 11160690U JP 11160690 U JP11160690 U JP 11160690U JP H0468488 U JPH0468488 U JP H0468488U
- Authority
- JP
- Japan
- Prior art keywords
- base
- transistor
- winding
- output
- switching
- 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 10
- 238000010586 diagram Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000009499 grossing Methods 0.000 description 1
Landscapes
- Dc-Dc Converters (AREA)
Description
第１図は本考案による自励式スイツチング電源
回路の一実施例を示す回路図、第２図は従来の自
励式スイツチング電源回路を示す回路図、第３図
は従来の他の自励式スイツチング電源回路を示す
回路図である。
Ｃ２，Ｃ３……コンデンサ、Ｃ，Ｃ４，Ｃ５…
…平滑コンデンサ、Ｄ，Ｄ１，Ｄ２……整流用ダ
イオード、Ｄ３……ツエナダイオード、ＩＣ２…
…フオトカプラ、ＬＰ……１次巻線、ＬＢ……ベ
ース巻線、ＬＳ１，ＬＳ２，……，ＬＳｎ……２
次巻線、Ｑ１，Ｑ２……トランジスタ、Ｒ２，Ｒ
３……ベース抵抗、Ｒ４……抵抗、Ｒ５，Ｒ６…
…分圧用抵抗、Ｒ７……放電用抵抗、Ｔ……コン
バータトランス、Ｔｒ１……スイツチングトラン
ジスタ、Ｔｒ２……トランジスタ。
Fig. 1 is a circuit diagram showing an embodiment of a self-excited switching power supply circuit according to the present invention, Fig. 2 is a circuit diagram showing a conventional self-excited switching power supply circuit, and Fig. 3 is a circuit diagram showing another conventional self-excited switching power supply circuit. FIG. C2, C3...Capacitor, C, C4, C5...
...Smoothing capacitor, D, D1, D2... Rectifier diode, D3... Zener diode, IC2...
...Photocoupler, LP...Primary winding, LB...Base winding, LS 1 , LS 2 , ..., LS n ... 2
Next winding, Q1, Q2...transistor, R2, R
3...Base resistance, R4...Resistance, R5, R6...
... Resistor for voltage division, R7... Resistor for discharge, T... Converter transformer, Tr1... Switching transistor, Tr2... Transistor.
Claims (1)
力電源を供給し、この１次巻線の他端と接地間に
スイツチングトランジスタを接続し、上記１次巻
線の一端とこのスイツチングトランジスタのベー
ス間に起動用抵抗を接続し、上記コンバータトラ
ンスのベース巻線の一端を上記スイツチングトラ
ンジスタのベースに接続するとともに、このベー
ス巻線の他端を接地することで、上記スイツチン
グトランジスタを自励的にスイツチングし、上記
コンバータトランスの２次巻線に出力される２次
側交流出力を整流回路によつて整流して直流出力
電源を取り出す自励式スイツチング電源回路にお
いて、 上記ベース巻線の一端と上記スイツチングトラ
ンジスタのベース間に第１のトランジスタを接続
し、この第１のトランジスタのベースと接地側に
第２のトランジスタを接続し、上記ベース巻線の
一端に接続される整流回路の出力端を上記第１の
トランジスタのベースに抵抗を介して接続すると
ともに、この整流回路の出力端を上記第２のトラ
ンジスタのベースに定電圧ダイオードを介して接
続することを特徴とする自励式スイツチング電源
回路。[Claims for Utility Model Registration] DC input power is supplied to one end of the primary winding of the converter transformer, a switching transistor is connected between the other end of the primary winding and ground, and the A starting resistor is connected between one end and the base of this switching transistor, one end of the base winding of the converter transformer is connected to the base of the switching transistor, and the other end of this base winding is grounded. In a self-excited switching power supply circuit, the switching transistor is self-excited, and the secondary side AC output output to the secondary winding of the converter transformer is rectified by a rectifier circuit to obtain a DC output power source. , a first transistor is connected between one end of the base winding and the base of the switching transistor, a second transistor is connected to the base of the first transistor and the ground side, and a second transistor is connected to one end of the base winding. The output end of the rectifier circuit to be connected is connected to the base of the first transistor via a resistor, and the output end of this rectifier circuit is connected to the base of the second transistor via a constant voltage diode. Features a self-excited switching power supply circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11160690U JPH0468488U (en) | 1990-10-26 | 1990-10-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11160690U JPH0468488U (en) | 1990-10-26 | 1990-10-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0468488U true JPH0468488U (en) | 1992-06-17 |
Family
ID=31859074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11160690U Pending JPH0468488U (en) | 1990-10-26 | 1990-10-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0468488U (en) |
-
1990
- 1990-10-26 JP JP11160690U patent/JPH0468488U/ja active Pending
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