JPS593746U

JPS593746U - power supply

Info

Publication number: JPS593746U
Application number: JP5958383U
Authority: JP
Inventors: 慎二佐藤
Original assignee: 松下電器産業株式会社
Priority date: 1983-04-20
Filing date: 1983-04-20
Publication date: 1984-01-11
Also published as: JPS644288Y2

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

[Brief explanation of the drawing]

図は本考案の一実施例における電源装置の回路図である
。１・・・交流電源供給端子、２．２′・・・交流電源入
力端子、４・・・整流回路、５・・・平滑用コンデンサ
、６・・・直流制御トランジスタ、７・・・誤差増幅ト
ランジスタ、１０．　１１．　１２・・・出力電圧検出
用抵抗群、１４・・・内蔵バッテリ、１５・・・負荷、
１６・・・充電表示ランプ、１８．１９・・・ダイオー
ド、２１゜２２．２４・・・切換スイッチ、２３・・・
外部直流電源入力端子。The figure is a circuit diagram of a power supply device according to an embodiment of the present invention. 1... AC power supply terminal, 2.2'... AC power input terminal, 4... Rectifier circuit, 5... Smoothing capacitor, 6... DC control transistor, 7... Error amplification transistor, 10. 11. 12...Output voltage detection resistor group, 14...Built-in battery, 15...Load,
16... Charge indicator lamp, 18.19... Diode, 21°22.24... Changeover switch, 23...
External DC power input terminal.

Claims

[Scope of utility model registration request]

Between an AC power supply input terminal, a rectifier circuit that rectifies and smoothes the AC power supply voltage applied to this input terminal, a stabilizing power supply circuit that stabilizes the output voltage of this rectifier circuit, and the output terminal of this stabilizing power supply circuit. A connected light-emitting element for displaying charge, a built-in battery connected in parallel to the light-emitting element for displaying charge via a discharge blocking diode, and one output terminal of the stabilized power supply circuit and the left side of the light-emitting element for displaying charge. a first changeover switch inserted between the built-in battery and the parallel circuit;
A series circuit of a second diode and a resistor connected in parallel to a part of the output voltage detection resistor constituting the stabilized power supply circuit via the first changeover switch, and an AC power supply to the AC power supply input terminal. A second changeover switch that switches in conjunction with connection and disconnection of the supply terminal, an external DC power input terminal, a first contact of the external DC power input terminal, and a first fixation of the second changeover switch. a third changeover switch inserted between one output terminal of the rectifier circuit and one input terminal of the stabilized power supply circuit and switched in conjunction with the first changeover switch; The input terminal connects the first contact and the second contact, which is normally short-circuited, to the movable contact of the second changeover switch, and connects the third contact to the other input terminal of the stabilized power supply circuit. The second changeover switch connects a second fixed contact to one electrode of the built-in battery, and the second diode is inserted with the polarity opposite to that of the discharge blocking diode, so that it is conductive and stable when charging the built-in battery. A power supply device in which a resistor is connected in parallel to a part of an output voltage detection resistor in order to set a high output voltage of a power supply circuit.