JPH0458054U - - Google Patents
Info
- Publication number
- JPH0458054U JPH0458054U JP9810690U JP9810690U JPH0458054U JP H0458054 U JPH0458054 U JP H0458054U JP 9810690 U JP9810690 U JP 9810690U JP 9810690 U JP9810690 U JP 9810690U JP H0458054 U JPH0458054 U JP H0458054U
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- switching element
- overcurrent
- power source
- 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.)
- Pending
Links
- 238000010586 diagram Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
Landscapes
- Television Receiver Circuits (AREA)
- Emergency Protection Circuit Devices (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
図は従来の電源保護回路の一例を示す回路図であ
る。
１……ブリツジ整流回路、５……コンバータト
ランス、６……抵抗、７……コントロールＩＣ、
８……スイツチングデバイス、９……過電流検出
回路、１０……ドライブ回路、１１ａ，１１ｂ…
…整流器、１３，１６……トランジスタ、１９，
３１……フオトカプラ、２１，２２，３０……分
割抵抗、２５……電流制限回路。
Figure 1 is a circuit diagram showing one embodiment of the present invention;
The figure is a circuit diagram showing an example of a conventional power supply protection circuit. 1... Bridge rectifier circuit, 5... Converter transformer, 6... Resistor, 7... Control IC,
8...Switching device, 9...Overcurrent detection circuit, 10...Drive circuit, 11a, 11b...
... Rectifier, 13, 16 ... Transistor, 19,
31... Photocoupler, 21, 22, 30... Dividing resistor, 25... Current limiting circuit.
Claims (1)
て、商用電源電圧を整流する整流回路の出力電流
を、スイツチング素子によつてスイツチング制御
し、前記待機電源および定常主電源に応じた所定
電力を負荷に供給する電源回路において、前記待
機電源および定常主電源を切り換える信号に応じ
て選択される待機電源用および定常主電源用の複
数の過電流設定値を有し、前記スイツチング素子
に流れる電流が前記選択された過電流設定値以上
のときに前記スイツチング素子の制御量を制限す
る過電流保護部を設けたことを特徴とする電源保
護回路。 A power supply circuit that serves as both a standby power source and a steady main power source, in which the output current of a rectifier circuit that rectifies the commercial power supply voltage is controlled by a switching element, and a predetermined power corresponding to the standby power source and the steady main power source is loaded. The power supply circuit supplies the switching element with a plurality of overcurrent setting values for the standby power supply and the steady main power supply, which are selected according to the signal for switching between the standby power supply and the steady main power supply, and the current flowing through the switching element 1. A power supply protection circuit comprising an overcurrent protection section that limits a control amount of the switching element when the overcurrent is equal to or higher than a selected overcurrent setting value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9810690U JPH0458054U (en) | 1990-09-20 | 1990-09-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9810690U JPH0458054U (en) | 1990-09-20 | 1990-09-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0458054U true JPH0458054U (en) | 1992-05-19 |
Family
ID=31839027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9810690U Pending JPH0458054U (en) | 1990-09-20 | 1990-09-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0458054U (en) |
-
1990
- 1990-09-20 JP JP9810690U patent/JPH0458054U/ja active Pending
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