JPS5948141U

JPS5948141U - load disconnect circuit

Info

Publication number: JPS5948141U
Application number: JP14236082U
Authority: JP
Inventors: 石渡　和明; 富田　裕三
Original assignee: 日本ビクター株式会社
Priority date: 1982-09-20
Filing date: 1982-09-20
Publication date: 1984-03-30

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 drawings]

第１図は本考案の負荷切り離し回路の原理図、第２図は
第１図の本考案の負荷切り離し回路の原　′理説明図、
第３図は本考案の負荷切り離し１路の一実施例である。Ａ、　Ｂ−・・負荷回路、Ｃ・・・電源コンデンサ、ａ
。ｂ、　　ｘ・・・電源入力端子、ｙ、　　ｚ・・・電源
出力端子、−・・・入力電源切断時間、ｔ□・・・負荷
回路切り離し時間、”２ｍ　”３−”・電源切断後に電
圧がＯＶ（ボルト）になる時間、Ｅｏ・・・通常時の電
圧、Ｅｌ・・・負荷回路切　　　　−り離し時の電圧、
Ｘｌ、　Ｘ２−ＮＰＮ　）ランジスタ、ｘ３・・−ｐＮ
ｐ　）ランジスタ、Ｄ・・・定電圧ダイオード（ツェナ
ーダイオード）、Ｒ１，Ｒ２・・・抵抗。Figure 1 is a diagram of the principle of the load disconnection circuit of the present invention, Figure 2 is an explanatory diagram of the principle of the load disconnection circuit of the present invention shown in Figure 1,
FIG. 3 shows an embodiment of the one-path load disconnection system of the present invention. A, B-...Load circuit, C...Power supply capacitor, a
. b. Eo...Voltage at normal time, El...Voltage when load circuit is disconnected,
Xl, X2-NPN) transistor, x3...-pN
p) Transistor, D... Constant voltage diode (Zener diode), R1, R2... Resistor.

Claims

[Scope of utility model registration request]

a first output terminal is connected to the power input terminal via a first transistor, and a second output terminal is connected to the power input terminal via a second transistor and the first transistor; The second transistor is turned off by detecting that the current flowing through the constant voltage diode connected to the base of the first transistor becomes equal to or less than a predetermined value due to a decrease in the power supply voltage supplied to the input terminal. A load disconnection circuit configured to be activated and to stop supplying voltage to the second output terminal.