JPS6034618U

JPS6034618U - Protection circuit for capacitor inrush current control circuit

Info

Publication number: JPS6034618U
Application number: JP12413283U
Authority: JP
Inventors: 稲生　清春
Original assignee: 横河電機株式会社
Priority date: 1983-08-10
Filing date: 1983-08-10
Publication date: 1985-03-09

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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は、本考案の背景をなす突入電流制御回路の一例
の電気的構成図、第２図は、第１図の回路の動作説明図
、第３図は、本考案実施例の電気的構成図、第４図は、
第３図の回路の動作説明図である。１・・・スイッチング・レギレーションＯ路ｌ、２・・
・突入電流制御回路、Ｑ・・・トランジスタ、Ａ・・・
演算増幅器、ＣＮＴ・・・制御回路、ＣＯＭＰＩ、ＣＯ
ＭＰ２・・・比較器、ＦＦＩ、ＦＦ２・・・フリップ・
フロップ回路。FIG. 1 is an electrical configuration diagram of an example of an inrush current control circuit that forms the background of the present invention, FIG. 2 is an explanatory diagram of the operation of the circuit in FIG. 1, and FIG. The configuration diagram, Figure 4, is
FIG. 4 is an explanatory diagram of the operation of the circuit of FIG. 3; 1... Switching regulation O path l, 2...
・Inrush current control circuit, Q...transistor, A...
Operational amplifier, CNT...control circuit, COMPI, CO
MP2... Comparator, FFI, FF2... Flip.
flop circuit.

Claims

[Scope of claim for utility model registration] Emitter/
A capacitor inrush current control circuit that includes a transistor whose collector circuit is connected in series, and a control means that controls the transistor based on the difference between a signal based on the voltage across the capacitor and a reference signal to control the inrush current when the power is turned on. A protection circuit for: a first comparator that compares the power supply voltage with a reference value and detects the establishment of the power supply voltage; and a second comparator that compares the voltage across the capacitor with the reference value and detects a drop in the voltage. a first flip-flop circuit set by the voltage establishment detection signal of the first comparator and reset by the setting of a second flip-flop circuit described below; It is set when the flip-flop circuit is set, and is reset by the voltage drop signal of the second comparator, and the output signal at the time of reset is sent to the control means of the inrush current control circuit of the capacitor, and the transistor is turned on. A protection circuit having a second flip-flop circuit that is applied as a signal to be turned off.