JPS59130116U - Overcurrent prevention circuit in power supply circuit - Google Patents
Overcurrent prevention circuit in power supply circuitInfo
- Publication number
- JPS59130116U JPS59130116U JP2412883U JP2412883U JPS59130116U JP S59130116 U JPS59130116 U JP S59130116U JP 2412883 U JP2412883 U JP 2412883U JP 2412883 U JP2412883 U JP 2412883U JP S59130116 U JPS59130116 U JP S59130116U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- load
- circuit
- turned
- voltage
- 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
- 230000002265 prevention Effects 0.000 title claims description 3
- 239000003990 capacitor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
図は、この考案の電源回路における過電流防止回路の一
実施例を示す回路図である。
１・・・電源トランス、ＳＥ・・・整流回路、Ｑ１〜Ｑ
４・・・トランジスタ、Ｒ１−Ｒ８・・・抵抗、ＲＬ・
・・負荷、Ｃ１〜Ｃ５・・・コンデンサ、Ｄｌ・・・ツ
ェナーダイオード、Ｄ２・・・ダイオード。The figure is a circuit diagram showing an embodiment of the overcurrent prevention circuit in the power supply circuit of this invention. 1... Power transformer, SE... Rectifier circuit, Q1~Q
4...Transistor, R1-R8...Resistor, RL・
...Load, C1-C5...Capacitor, Dl...Zener diode, D2...Diode.
Claims (1)
スタと、この第１のトランジスタの出力電流に応じてイ
ンピーダンスが変化し入力側の直流電圧を定電圧に制御
して上記負荷に定電圧を印加する制御用の第２のトラン
ジスタと、この第２のトランジスタの出力側と負荷との
間に挿入され負荷に印加する電圧のリップルを除去する
ためのフィルタ用の抵抗と、負荷電流の正常時にはオフ
となりかつ過負荷時にはオンとなって上記第１のトラン
ジスタの動作点を移動させて上記第２のトランジスタの
出力を低下させる第３のトランジスタと、この第３のト
ランジスタとともにＡＮＤ回路を構成し、上記第３のト
ランジスタがオンになって所定時間経過後にオンとなっ
て、上記第３のトランジスタに対して第１のトランジス
タの動作点が移動するように作動する第４のトランジス
タとよりなる電源回路における過電流防止回路。A first transistor serves as an error detector that detects the load voltage, and the impedance changes according to the output current of the first transistor, and the DC voltage on the input side is controlled to a constant voltage to apply the constant voltage to the load. a second transistor for control, a filter resistor inserted between the output side of this second transistor and the load to remove ripples in the voltage applied to the load, and a resistor that is turned off when the load current is normal. and a third transistor that is turned on during overload to shift the operating point of the first transistor and reduce the output of the second transistor, and the third transistor constitutes an AND circuit, In a power supply circuit comprising a fourth transistor that is turned on after a predetermined time has elapsed since the third transistor is turned on and operates so that the operating point of the first transistor moves with respect to the third transistor. Overcurrent prevention circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2412883U JPS59130116U (en) | 1983-02-21 | 1983-02-21 | Overcurrent prevention circuit in power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2412883U JPS59130116U (en) | 1983-02-21 | 1983-02-21 | Overcurrent prevention circuit in power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59130116U true JPS59130116U (en) | 1984-09-01 |
Family
ID=30155184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2412883U Pending JPS59130116U (en) | 1983-02-21 | 1983-02-21 | Overcurrent prevention circuit in power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59130116U (en) |
-
1983
- 1983-02-21 JP JP2412883U patent/JPS59130116U/en active Pending
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