JPS63692U - - Google Patents
Info
- Publication number
- JPS63692U JPS63692U JP9441986U JP9441986U JPS63692U JP S63692 U JPS63692 U JP S63692U JP 9441986 U JP9441986 U JP 9441986U JP 9441986 U JP9441986 U JP 9441986U JP S63692 U JPS63692 U JP S63692U
- Authority
- JP
- Japan
- Prior art keywords
- winding
- switching transistor
- output
- collector
- positive feedback
- 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 9
- 230000010355 oscillation Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
Landscapes
- Continuous-Control Power Sources That Use Transistors (AREA)
- Dc-Dc Converters (AREA)
Description
第１図は本考案に係るスイツチング電源の一実
施例の回路図、第２図は従来のスイツチング電源
の回路図である。
１……発振トランス、２……コレクタ巻線、３
……正帰還巻線、４……出力巻線、５……負荷、
６，７……出力端子、１１……ベース電流制御回
路、１２……フオトカプラ（Ｄ３……発光ダイオ
ード、Ｑ３……フオトトランジスタ）、Ｑ１……
スイツチングトランジスタ、１３′……検出回路
（Ｑ４……トランジスタ、Ｒ′１，Ｒ′２，Ｒ′
３，Ｒ′４……抵抗）。
FIG. 1 is a circuit diagram of an embodiment of a switching power supply according to the present invention, and FIG. 2 is a circuit diagram of a conventional switching power supply. 1...Oscillation transformer, 2...Collector winding, 3
...Positive feedback winding, 4...Output winding, 5...Load,
6, 7...Output terminal, 11...Base current control circuit, 12...Photocoupler ( D3 ...Light emitting diode, Q3 ...Phototransistor), Q1 ...
Switching transistor, 13'...Detection circuit ( Q4 ...Transistor, R'1 , R'2 , R'
3 , R' 4 ...resistance).
Claims (1)
タのコレクタとの間に接続されたコレクタ巻線と
このコレクタ巻線と電磁的に結合されて上記スイ
ツチングトランジスタのコレクタ出力をベース側
に正帰還して上記スイツチングトランジスタを自
励振させる正帰還巻線と出力巻線とを有する発振
トランスと、 上記発振トランスの出力巻線の直流変換出力が
エミツタフオロア回路に入力され、このエミツタ
フオロア回路によりフオトカプラの発光素子が駆
動される一方、この発光素子からの光が入射され
るフオトカプラの受光素子の出力信号に対応して
上記正帰還巻線からスイツチングトランジスタの
ベースに供給されるベース電流を入力電源の他端
側に分流し、上記信号電圧が一定となるように制
御するベース電流制御回路とを備えてなるスイツ
チング電源。[Claims for Utility Model Registration] A switching transistor, a collector winding connected between one end of an input power source and the collector of the switching transistor, and the switching transistor electromagnetically coupled to the collector winding. an oscillation transformer having a positive feedback winding and an output winding for positive feedback of the collector output to the base side to cause the switching transistor to self-oscillate; and a DC conversion output of the output winding of the oscillation transformer is input to an emitter follower circuit. The emitter follower circuit drives the light emitting element of the photocoupler, while the light from the light emitting element is supplied to the base of the switching transistor from the positive feedback winding in response to the output signal of the light receiving element of the photocoupler. A switching power supply comprising: a base current control circuit that branches the base current to the other end of the input power supply and controls the signal voltage to be constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9441986U JPS63692U (en) | 1986-06-19 | 1986-06-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9441986U JPS63692U (en) | 1986-06-19 | 1986-06-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63692U true JPS63692U (en) | 1988-01-06 |
Family
ID=30957861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9441986U Pending JPS63692U (en) | 1986-06-19 | 1986-06-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63692U (en) |
-
1986
- 1986-06-19 JP JP9441986U patent/JPS63692U/ja active Pending