JPH0321983U - - Google Patents
Info
- Publication number
- JPH0321983U JPH0321983U JP8120589U JP8120589U JPH0321983U JP H0321983 U JPH0321983 U JP H0321983U JP 8120589 U JP8120589 U JP 8120589U JP 8120589 U JP8120589 U JP 8120589U JP H0321983 U JPH0321983 U JP H0321983U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- output
- power supply
- voltage
- smoothing capacitor
- 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 9
- 239000003990 capacitor Substances 0.000 claims description 5
- 238000009499 grossing Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Television Receiver Circuits (AREA)
- Rectifiers (AREA)
- Dc-Dc Converters (AREA)
Description
第１図は本考案による電源回路の一実施例を示
す回路図、第２図は従来の電源回路を示す回路図
である。
１ａ，１ｂ……入力端子、２……ダイオードブ
リツジ、３……スタンバイ回路部、５……リレー
、９……マイクロコンピユータ、１１……リレー
ドライブトランジスタ、１２……平滑コンデンサ
、１３……メイン回路部、２３……出力端子、２
４，２５……検出用抵抗、２６，２８……制御ト
ランジスタ、２７……サイリスタ、２９，３０…
…抵抗、３１……デイレー回路、３２，３３……
検出用抵抗、３４，３６……トランジスタ、３５
……抵抗。
FIG. 1 is a circuit diagram showing an embodiment of a power supply circuit according to the present invention, and FIG. 2 is a circuit diagram showing a conventional power supply circuit. 1a, 1b...Input terminal, 2...Diode bridge, 3...Standby circuit section, 5...Relay, 9...Microcomputer, 11...Relay drive transistor, 12...Smoothing capacitor, 13...Main Circuit section, 23...Output terminal, 2
4, 25... Detection resistor, 26, 28... Control transistor, 27... Thyristor, 29, 30...
...Resistor, 31...Delay circuit, 32, 33...
Detection resistor, 34, 36...Transistor, 35
……resistance.
Claims (1)
整流出力を平滑コンデンサで平滑し、この平滑コ
ンデンサの平滑出力を直流出力回路に供給して、
この直流出力回路から直流電源を得るとともに、
上記直流電源の電圧降下を上記直流出力回路の出
力端子間において検出回路により検出し、上記直
流電源をオン・オフするためのスイツチ回路を制
御する制御能動素子を上記検出回路の検出出力に
基づいて動作させて、上記直流電源の電圧降下時
に該直流電源をオフする保護回路を設けた電源回
路において、上記平滑コンデンサの両端電圧を検
出する電圧検出回路と、この電圧検出回路の検出
出力に基づいて導通し上記制御能動素子の制御入
力端子と接地間に接続される能動素子とを備えた
ことを特徴とする電源回路。 The AC power source is rectified by a rectifier circuit, the rectified output of this rectifier circuit is smoothed by a smoothing capacitor, and the smoothed output of this smoothing capacitor is supplied to a DC output circuit.
In addition to obtaining DC power from this DC output circuit,
A detection circuit detects the voltage drop of the DC power supply between the output terminals of the DC output circuit, and a control active element for controlling a switch circuit for turning on and off the DC power supply is installed based on the detection output of the detection circuit. In a power supply circuit provided with a protection circuit that turns off the DC power supply when the voltage of the DC power supply drops during operation, a voltage detection circuit detects the voltage across the smoothing capacitor, and a voltage detection circuit detects the voltage across the smoothing capacitor based on the detection output of the voltage detection circuit. A power supply circuit comprising an active element electrically connected between a control input terminal of the control active element and ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8120589U JPH0321983U (en) | 1989-07-12 | 1989-07-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8120589U JPH0321983U (en) | 1989-07-12 | 1989-07-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0321983U true JPH0321983U (en) | 1991-03-06 |
Family
ID=31626934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8120589U Pending JPH0321983U (en) | 1989-07-12 | 1989-07-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0321983U (en) |
-
1989
- 1989-07-12 JP JP8120589U patent/JPH0321983U/ja active Pending