JPS6184686U - - Google Patents
Info
- Publication number
- JPS6184686U JPS6184686U JP16950484U JP16950484U JPS6184686U JP S6184686 U JPS6184686 U JP S6184686U JP 16950484 U JP16950484 U JP 16950484U JP 16950484 U JP16950484 U JP 16950484U JP S6184686 U JPS6184686 U JP S6184686U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- output
- reference voltage
- voltage
- timer
- 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
- 238000009499 grossing Methods 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Protection Of Static Devices (AREA)
- Dc-Dc Converters (AREA)
Description
第１図は本考案の実施例を示す回路図、第２図
は実施例の動作を説明するための波形図、第３図
は従来の電源回路を示す回路図、第４図及び第５
図は従来例の動作を説明するための波形図である
。
２…電源スイツチ、３…整流平滑回路、６…ス
イツチングパワートランジスタ、１１…負荷、１
６…基準電圧発生回路、２３…出力ドライブトラ
ンジスタ、３４…コンデンサ、３５…タイマー回
路、３６…ラツチ回路、４０…制御回路。
Fig. 1 is a circuit diagram showing an embodiment of the present invention, Fig. 2 is a waveform diagram for explaining the operation of the embodiment, Fig. 3 is a circuit diagram showing a conventional power supply circuit, Figs.
The figure is a waveform diagram for explaining the operation of the conventional example. 2... Power switch, 3... Rectifier and smoothing circuit, 6... Switching power transistor, 11... Load, 1
6... Reference voltage generation circuit, 23... Output drive transistor, 34... Capacitor, 35... Timer circuit, 36... Latch circuit, 40... Control circuit.
Claims (1)
を整流平滑する整流平滑回路、スイツチングパワ
ートランジスタを含んで構成され前記整流平滑回
路の出力を入力し、安定化直流電圧を出力するス
イツチングレギユレータ、前記整流平滑回路の出
力を入力し基準電圧を発生する基準電圧発生回路
、コンデンサを含んで構成され前記安定化直流電
圧の低下に応じて動作を開始するタイマー回路と
、該タイマー回路の出力でセツトされ且つ前記基
準電圧がリセツト端子に入力され該基準電圧が所
定電位より低下したときリセツトされるラツチ回
路とを有し、前記安定化直流電圧の低下時に前記
スイツチングパワートランジスタを強制的にオフ
するタイマー・ラツチ式短絡保護回路を備えた電
源回路において、前記整流平滑回路の出力の低下
時に前記タイマー回路のコンデンサを放電させる
制御回路を設けたことを特徴とする電源回路。 A switching regulator that is configured to include a rectifier and smoothing circuit that rectifies and smoothes an AC power supply voltage input through a power switch, and a switching power transistor, and that receives the output of the rectifier and smoother circuit and outputs a stabilized DC voltage. , a reference voltage generation circuit that inputs the output of the rectifying and smoothing circuit and generates a reference voltage, a timer circuit that is configured to include a capacitor and starts operating in response to a decrease in the stabilized DC voltage, and an output of the timer circuit. and a latch circuit that is reset when the reference voltage is input to a reset terminal and the reference voltage drops below a predetermined potential, and forcibly turns off the switching power transistor when the stabilized DC voltage drops. What is claimed is: 1. A power supply circuit equipped with a timer/latch type short-circuit protection circuit, characterized in that the power supply circuit is provided with a control circuit that discharges a capacitor of the timer circuit when the output of the rectifying and smoothing circuit decreases.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16950484U JPH0323827Y2 (en) | 1984-11-08 | 1984-11-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16950484U JPH0323827Y2 (en) | 1984-11-08 | 1984-11-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6184686U true JPS6184686U (en) | 1986-06-04 |
| JPH0323827Y2 JPH0323827Y2 (en) | 1991-05-23 |
Family
ID=30727235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16950484U Expired JPH0323827Y2 (en) | 1984-11-08 | 1984-11-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0323827Y2 (en) |
-
1984
- 1984-11-08 JP JP16950484U patent/JPH0323827Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0323827Y2 (en) | 1991-05-23 |
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