JPS6440287U - - Google Patents
Info
- Publication number
- JPS6440287U JPS6440287U JP13576987U JP13576987U JPS6440287U JP S6440287 U JPS6440287 U JP S6440287U JP 13576987 U JP13576987 U JP 13576987U JP 13576987 U JP13576987 U JP 13576987U JP S6440287 U JPS6440287 U JP S6440287U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- switching
- switching transistor
- voltage
- control
- 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
- 230000000903 blocking effect Effects 0.000 claims 2
- 238000009499 grossing Methods 0.000 claims 2
- 230000010355 oscillation Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Dc-Dc Converters (AREA)
Description
図面は本考案によるスイツチング制御型電源回
路の一実施例を示す回路図である。
Ｑ１……スイツチングトランジスタ、Ｑ２，Ｑ
３……第１第２制御トランジスタ、Ｑ４……保護
用トランジスタ、ＣＴ……コンバータトランス、
Ｎ１……入力巻線、Ｎ３……帰還巻線。
The drawing is a circuit diagram showing an embodiment of a switching control type power supply circuit according to the present invention. Q 1 ... switching transistor, Q 2 , Q
3 ...First and second control transistor, Q4 ...Protection transistor, CT...Converter transformer,
N1 ...Input winding, N3 ...Feedback winding.
Claims (1)
スイツチングトランジスタとでブロツキング発振
を行なうスイツチング制御型電源回路に於いて、
前記スイツチングトランジスタのオフ期間に前記
帰還巻線に発生する電圧を整流平滑して得る電圧
に応じて可変インピーダンス動作する第１の制御
トランジスタと、前記スイツチングトランジスタ
のオン期間に前記帰還巻線に発生する電圧を整流
平滑して得る電圧によつてオンする第２の制御ト
ランジスタを備え、第１の制御トランジスタによ
つて前記帰還巻線から前記スイツチングトランジ
スタへの正帰還電流の大きさを制御することによ
つて定電圧動作を行なうと共に、負荷短絡時に第
２の制御トランジスタがターンオフすることによ
つて前記スイツチングトランジスタのブロツキン
グ発振動作を停止させるようにしたことを特徴と
するスイツチング制御型電源回路。 In a switching control type power supply circuit that performs blocking oscillation using the input winding and feedback winding of a converter transformer and a switching transistor,
a first control transistor that operates with variable impedance according to a voltage obtained by rectifying and smoothing the voltage generated in the feedback winding during the off period of the switching transistor; A second control transistor is provided that is turned on by a voltage obtained by rectifying and smoothing the generated voltage, and the first control transistor controls the magnitude of the positive feedback current from the feedback winding to the switching transistor. A switching control type power supply characterized in that the switching transistor performs constant voltage operation by doing so, and the blocking oscillation operation of the switching transistor is stopped by turning off the second control transistor when the load is short-circuited. circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13576987U JPS6440287U (en) | 1987-09-04 | 1987-09-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13576987U JPS6440287U (en) | 1987-09-04 | 1987-09-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6440287U true JPS6440287U (en) | 1989-03-10 |
Family
ID=31395662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13576987U Pending JPS6440287U (en) | 1987-09-04 | 1987-09-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6440287U (en) |
-
1987
- 1987-09-04 JP JP13576987U patent/JPS6440287U/ja active Pending