JPS63160041U - - Google Patents
Info
- Publication number
- JPS63160041U JPS63160041U JP5099887U JP5099887U JPS63160041U JP S63160041 U JPS63160041 U JP S63160041U JP 5099887 U JP5099887 U JP 5099887U JP 5099887 U JP5099887 U JP 5099887U JP S63160041 U JPS63160041 U JP S63160041U
- Authority
- JP
- Japan
- Prior art keywords
- switching element
- overcurrent
- switching
- semiconductor element
- overcurrent protection
- 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
- 239000004065 semiconductor Substances 0.000 claims 4
- 238000001514 detection method Methods 0.000 claims 3
- 238000010586 diagram Methods 0.000 description 6
- 238000009499 grossing Methods 0.000 description 1
Landscapes
- Dc-Dc Converters (AREA)
- Protection Of Static Devices (AREA)
Description
第１図は本考案の一実施例を示す回路図、第２
図は本実施例の回路素子の動作波形を示すタイム
チヤート、第３図は従来のスイツチングレギユレ
ータを示す回路図、第４図は従来の過電流保護回
路を示す回路図、第５図は従来のスイツチングレ
ギユレータの出力電圧―出力電流特性を示す図で
ある。
１，１１…起動回路、２…バイアス回路、３…
整流・平滑回路、４…負荷。
Figure 1 is a circuit diagram showing one embodiment of the present invention, Figure 2 is a circuit diagram showing an embodiment of the present invention.
The figure is a time chart showing the operating waveforms of the circuit elements of this embodiment, Fig. 3 is a circuit diagram showing a conventional switching regulator, Fig. 4 is a circuit diagram showing a conventional overcurrent protection circuit, and Fig. 5 is a circuit diagram showing the conventional switching regulator. is a diagram showing the output voltage-output current characteristics of a conventional switching regulator. 1, 11...Starting circuit, 2...Bias circuit, 3...
Rectifier/smoothing circuit, 4...Load.
Claims (1)
給する入力電流をスイツチング素子Ｑ１によりス
イツチングして前記パルストランスＴの２次側よ
り安定電圧を得る自励振形スイツチングレギユレ
ータにおいて、 前記パルストランスＴの１次側に前記スイツチ
ング素子Ｑ１に流れる過大電流を検出する過電流
検出手段Ｒ２と、 該過電流検出手段Ｒ２により動作し前記スイツ
チング素子Ｑ１のオン時間幅を小さくする過電流
保護用半導体素子Ｑ２と、 該過電流保護用半導体素子Ｑ２の動作により動
作し、前記スイツチング素子Ｑ１のスイツチング
動作を停止させる半導体素子Ｑ３とを具備し、 前記スイツチング素子に過大電流が流れた時前
記スイツチング素子Ｑ１の動作を停止させること
を特徴とする過電流保護回路。[Claims for Utility Model Registration] A self-oscillation type switch that obtains a stable voltage from the secondary side of the pulse transformer T by switching the input current supplied from the DC power source E to the primary side of the pulse transformer T using a switching element Q1 . In the angular regulator, the primary side of the pulse transformer T includes an overcurrent detection means R2 for detecting an excessive current flowing through the switching element Q1 , and an overcurrent detection means R2 which is operated by the overcurrent detection means R2 to detect an overcurrent flowing through the switching element Q1. an overcurrent protection semiconductor element Q2 that reduces the on-time width of the overcurrent protection semiconductor element Q2, and a semiconductor element Q3 that operates according to the operation of the overcurrent protection semiconductor element Q2 and stops the switching operation of the switching element Q1 . An overcurrent protection circuit characterized in that the operation of the switching element Q1 is stopped when an excessive current flows through the switching element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5099887U JPS63160041U (en) | 1987-04-06 | 1987-04-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5099887U JPS63160041U (en) | 1987-04-06 | 1987-04-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63160041U true JPS63160041U (en) | 1988-10-19 |
Family
ID=30874866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5099887U Pending JPS63160041U (en) | 1987-04-06 | 1987-04-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63160041U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01130302A (en) * | 1987-10-14 | 1989-05-23 | Philips Gloeilampenfab:Nv | Magneto-optical recorder and driving circuit for the magneto-optical recorder |
-
1987
- 1987-04-06 JP JP5099887U patent/JPS63160041U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01130302A (en) * | 1987-10-14 | 1989-05-23 | Philips Gloeilampenfab:Nv | Magneto-optical recorder and driving circuit for the magneto-optical recorder |