JPS5892890U - Overvoltage protection circuit for switching control type power supply equipment - Google Patents
Overvoltage protection circuit for switching control type power supply equipmentInfo
- Publication number
- JPS5892890U JPS5892890U JP18700381U JP18700381U JPS5892890U JP S5892890 U JPS5892890 U JP S5892890U JP 18700381 U JP18700381 U JP 18700381U JP 18700381 U JP18700381 U JP 18700381U JP S5892890 U JPS5892890 U JP S5892890U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- winding
- power supply
- overvoltage protection
- protection circuit
- 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
Landscapes
- Dc-Dc Converters (AREA)
- Power Conversion In General (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
図面は本考案の過電圧保護回路を実施したスイッチング
制御型電源装置を示す一実施例である。
ＴＲ□・・・スイッチングトランジスタ、Ｎ１・・・入
力巻線、Ｎ２・・・帰還巻線、Ｎ３・・・検出巻線、Ｎ
４・・・補助検出巻線、ＴＲ５・・・保護用トランジス
タ、ＺＤ・・・ツェナー（定電圧）ダイオード。The drawing shows an embodiment of a switching control power supply device implementing the overvoltage protection circuit of the present invention. TR□...Switching transistor, N1...Input winding, N2...Feedback winding, N3...Detection winding, N
4... Auxiliary detection winding, TR5... Protection transistor, ZD... Zener (constant voltage) diode.
Claims (1)
流入力に対してコンバータトランスの入力巻線と直列に
接続し、このトランスの帰還巻線に発生する電圧を前記
トランジスタのベースに正帰還させてブロッキング発振
を行なわせると共に、前記トランスの検出巻線から得る
直流電圧に応じて前記トランジスタのターンオフタイミ
ングを制御するようにした電源装置に於いて、前記トラ
ンジスタのオン期間に高電位側になる一端が前記検出巻
線に接続された補助検出巻線を前記トラスに設け、この
巻線の他端と前記スイッチングトランジスタのベースと
の間に過電圧保護用のトランジスタのコレクターエミッ
タ間を接続し、このトランジスタのベースを定電圧ダイ
オードを介して前□記検出巻線から得る直流電圧の取出
し点に接続してなるスイッチング制御型電源装置の過電
圧保護回路。The collector and emitter of the switching transistor are connected in series with the input winding of a converter transformer with respect to DC input, and the voltage generated in the feedback winding of this transformer is positively fed back to the base of the transistor to perform blocking oscillation. In addition, in the power supply device in which the turn-off timing of the transistor is controlled according to the DC voltage obtained from the detection winding of the transformer, one end of the transistor that becomes a high potential side during the on period is connected to the detection winding. A connected auxiliary detection winding is provided on the truss, the collector-emitter of a transistor for overvoltage protection is connected between the other end of this winding and the base of the switching transistor, and the base of this transistor is connected to a constant voltage diode. An overvoltage protection circuit for a switching control power supply device, which is connected to a take-out point of the DC voltage obtained from the detection winding described above through the □.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18700381U JPS5892890U (en) | 1981-12-14 | 1981-12-14 | Overvoltage protection circuit for switching control type power supply equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18700381U JPS5892890U (en) | 1981-12-14 | 1981-12-14 | Overvoltage protection circuit for switching control type power supply equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5892890U true JPS5892890U (en) | 1983-06-23 |
| JPS6223271Y2 JPS6223271Y2 (en) | 1987-06-13 |
Family
ID=29989446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18700381U Granted JPS5892890U (en) | 1981-12-14 | 1981-12-14 | Overvoltage protection circuit for switching control type power supply equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5892890U (en) |
-
1981
- 1981-12-14 JP JP18700381U patent/JPS5892890U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6223271Y2 (en) | 1987-06-13 |
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