JPS59124369U

JPS59124369U - Power supply power failure detection circuit

Info

Publication number: JPS59124369U
Application number: JP1748183U
Authority: JP
Inventors: 菊本　隆; 堀崎　浩一
Original assignee: 株式会社日立製作所
Priority date: 1983-02-10
Filing date: 1983-02-10
Publication date: 1984-08-21

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]

第１図は従来の停電検出回路図、第２図は第１図のＶ１
〜■、で示した個所の電圧波形図、第３図は本考案によ
る停電検出回路図、第４図は第３図のＶ□〜Ｖ、で示し
た個所の電圧波形図である。１・・・主電源回路、２・・・主電源回餡の出力端子、
３・・・補助電源、４・・・補助電源用整流器、５・・
・停電検出用整流器、６・・・補助電源用平滑コンデン
サ、７・・・抵抗、８・・・ツェナーダイオード、９・
・・ホトカプラ、１０・・・コンデンサ、１１・・・抵
抗、１２・・・停電検出部、１３・・・コンパレータ／
アンプブロック、１４・・・停電検出回路、１５・・・
安定化電源ブロック、１６・・・ダイオード、１７・・
・ツェナーダイオード、１８・・・ｍＭ、１９−）ラン
ジスタ。Figure 1 is a conventional power failure detection circuit diagram, Figure 2 is V1 in Figure 1.
3 is a diagram of the power failure detection circuit according to the present invention, and FIG. 4 is a voltage waveform diagram of the locations indicated by V□ to V in FIG. 3. 1... Main power circuit, 2... Main power circuit output terminal,
3...Auxiliary power supply, 4...Auxiliary power supply rectifier, 5...
- Rectifier for power failure detection, 6... Smoothing capacitor for auxiliary power supply, 7... Resistor, 8... Zener diode, 9.
... Photocoupler, 10 ... Capacitor, 11 ... Resistor, 12 ... Power failure detection section, 13 ... Comparator /
Amplifier block, 14...Power failure detection circuit, 15...
Stabilized power supply block, 16...diode, 17...
- Zener diode, 18...mM, 19-) transistor.

Claims

[Scope of utility model registration request]

A power supply device that converts a commercial AC input power source into a DC voltage output, and a power failure detection unit that detects interruption of the commercial AC input power source;
In this power outage detection circuit, which consists of an auxiliary power supply provided to supply the power required for operation even after the commercial AC input power is cut off, a rectifier circuit that is shared by the power outage detection section and the auxiliary power supply section is provided in this power outage detection section. A power failure detection circuit for a power supply device.