JPH0454488U - - Google Patents
Info
- Publication number
- JPH0454488U JPH0454488U JP9664890U JP9664890U JPH0454488U JP H0454488 U JPH0454488 U JP H0454488U JP 9664890 U JP9664890 U JP 9664890U JP 9664890 U JP9664890 U JP 9664890U JP H0454488 U JPH0454488 U JP H0454488U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- primary side
- switching regulator
- control circuit
- inhibit
- 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
- 238000001514 detection method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
Landscapes
- Dc-Dc Converters (AREA)
- Power Conversion In General (AREA)
Description
第１図は本考案の一実施例を示すフオワード・
コンバータの回路図、第２図は従来の一次側過電
流保護回路の一例を示す回路図である。
１……パワーＭＯＳＦＥＴ、２，２３……トラ
ンジスタ、３〜５、８，２０〜２２……抵抗器、
６，７，１３……コンデンサ、９……変圧器、１
０，１１……ダイオード、１２……チヨークコイ
ル、１４……負荷、１５……安定化電源回路、１
６……ＰＷＭ制御用ＩＣ、１７……絶縁、１８…
…出力電圧検出／比較回路、１９……電流検出回
路、２４……インヒビツト回路、２５……デツド
タイム端子、２６……基準電圧端子。
Figure 1 shows a forward direction diagram showing an embodiment of the present invention
Converter circuit diagram FIG. 2 is a circuit diagram showing an example of a conventional primary side overcurrent protection circuit. 1... Power MOSFET, 2, 23... Transistor, 3-5, 8, 20-22... Resistor,
6, 7, 13... Capacitor, 9... Transformer, 1
0, 11...Diode, 12...Chiyoke coil, 14...Load, 15...Stabilized power supply circuit, 1
6...PWM control IC, 17...Insulation, 18...
...Output voltage detection/comparison circuit, 19...Current detection circuit, 24...Inhibit circuit, 25...Dead time terminal, 26...Reference voltage terminal.
Claims (1)
ユレータにおいて、主スイツチの電流を検出する
電流検出回路と、前記スイツチング・レギユレー
タ出力が過負荷時または短絡時にインヒビツト信
号を前記制御回路へ送出するインヒビツト回路と
を備えることを特徴とする一次側過電流保護回路
。 A switching regulator having a control circuit on the primary side, comprising a current detection circuit that detects the current of the main switch, and an inhibit circuit that sends an inhibit signal to the control circuit when the switching regulator output is overloaded or short-circuited. A primary side overcurrent protection circuit characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9664890U JPH0454488U (en) | 1990-09-14 | 1990-09-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9664890U JPH0454488U (en) | 1990-09-14 | 1990-09-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0454488U true JPH0454488U (en) | 1992-05-11 |
Family
ID=31836348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9664890U Pending JPH0454488U (en) | 1990-09-14 | 1990-09-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0454488U (en) |
-
1990
- 1990-09-14 JP JP9664890U patent/JPH0454488U/ja active Pending