JPS60132140U - Switching power supply protection circuit - Google Patents

Switching power supply protection circuit

Info

Publication number
JPS60132140U
JPS60132140U JP1682584U JP1682584U JPS60132140U JP S60132140 U JPS60132140 U JP S60132140U JP 1682584 U JP1682584 U JP 1682584U JP 1682584 U JP1682584 U JP 1682584U JP S60132140 U JPS60132140 U JP S60132140U
Authority
JP
Japan
Prior art keywords
switching power
power supply
protection circuit
supply protection
protection
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
Application number
JP1682584U
Other languages
Japanese (ja)
Inventor
佐脇　泰雅
Original Assignee
株式会社日立製作所
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 株式会社日立製作所 filed Critical 株式会社日立製作所
Priority to JP1682584U priority Critical patent/JPS60132140U/en
Publication of JPS60132140U publication Critical patent/JPS60132140U/en
Pending legal-status Critical Current

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  • Emergency Protection Circuit Devices (AREA)
  • Dc-Dc Converters (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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は、従来の倍電圧保護回路を示す図、第２図は本
考案による金属酸化バリスタを使用した倍電圧保護回路
の実施例を示す図である。 １・・・商用交流入力電圧、２・・・スイッチ、３・・
・電流ヒユーズ、４・・・ブリッジ整流器、５・・・平
滑コンデンサ、６・・・スイッチング回路部、７・・・
倍電、王保護回路部、８，９・・・抵抗、１０・・・ツ
ェナーダイオード、１１・・・低抵抗、１２・・・サイ
リスク、１３・・・スイッチングトランジスタ、１４・
・・金属酸化バリスタ。FIG. 1 is a diagram showing a conventional voltage doubler protection circuit, and FIG. 2 is a diagram showing an embodiment of the voltage doubler protection circuit using a metal oxide varistor according to the present invention. 1...Commercial AC input voltage, 2...Switch, 3...
・Current fuse, 4... Bridge rectifier, 5... Smoothing capacitor, 6... Switching circuit section, 7...
Doubler, protection circuit section, 8, 9... Resistor, 10... Zener diode, 11... Low resistance, 12... Cyrisk, 13... Switching transistor, 14...
...Metal oxide varistor.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] ラインオペレーション方式のスイッチンク電源回路の整
流平滑コンデンサの両端に、入力電圧の異常を検出し大
電流を流すことができる金属酸化バリスタとその保護用
の低抵抗を直列にしたものを接続し、過大電圧に対して
は、大電流を流して入力側に接続されている電流ヒユー
ズを溶断させて、素子の安全を高めることを特徴とした
スイッチンク電源の保護回路。A metal oxide varistor that can detect an abnormality in the input voltage and allow a large current to flow, and a low resistance for protection, are connected in series across the rectifying and smoothing capacitor of a line-operated switching power supply circuit. For voltage protection, this protection circuit for switching power supplies is characterized by flowing a large current to blow the current fuse connected to the input side, increasing the safety of the elements.
JP1682584U 1984-02-10 1984-02-10 Switching power supply protection circuit Pending JPS60132140U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1682584U JPS60132140U (en) 1984-02-10 1984-02-10 Switching power supply protection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1682584U JPS60132140U (en) 1984-02-10 1984-02-10 Switching power supply protection circuit

Publications (1)

Publication Number Publication Date
JPS60132140U true JPS60132140U (en) 1985-09-04

Family

ID=30503956

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1682584U Pending JPS60132140U (en) 1984-02-10 1984-02-10 Switching power supply protection circuit

Country Status (1)

Country Link
JP (1) JPS60132140U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0318910A (en) * 1989-06-15 1991-01-28 Furuno Electric Co Ltd Power control circuit
JP2006288155A (en) * 2005-04-04 2006-10-19 Canon Inc Power supply device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0318910A (en) * 1989-06-15 1991-01-28 Furuno Electric Co Ltd Power control circuit
JP2006288155A (en) * 2005-04-04 2006-10-19 Canon Inc Power supply device

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