JPS6038080U - Low input protection circuit for switching power supplies - Google Patents

Low input protection circuit for switching power supplies

Info

Publication number
JPS6038080U
JPS6038080U JP13092083U JP13092083U JPS6038080U JP S6038080 U JPS6038080 U JP S6038080U JP 13092083 U JP13092083 U JP 13092083U JP 13092083 U JP13092083 U JP 13092083U JP S6038080 U JPS6038080 U JP S6038080U
Authority
JP
Japan
Prior art keywords
transistor
switching power
protection circuit
low input
input 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
JP13092083U
Other languages
Japanese (ja)
Inventor
戸川　治朗
Original Assignee
日本ケミコン株式会社
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 日本ケミコン株式会社 filed Critical 日本ケミコン株式会社
Priority to JP13092083U priority Critical patent/JPS6038080U/en
Publication of JPS6038080U publication Critical patent/JPS6038080U/en
Pending legal-status Critical Current

Links

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

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

第１図はこの考案のスイッチング電源装置の低入力保護
回路の実施例を示す回路図、第２図はスイッチング制御
回路を示すブロック図、第３図は動作特性を示す説明図
である。 ３２・・・スイッチング制御回路、８０・・・低入力保
護回路、８２・・・第１のトランジスタ、９０・・・第
２のトランジスタ、９８・・・帰還回路。 第２図 −第３図FIG. 1 is a circuit diagram showing an embodiment of a low input protection circuit for a switching power supply device of this invention, FIG. 2 is a block diagram showing a switching control circuit, and FIG. 3 is an explanatory diagram showing operating characteristics. 32... Switching control circuit, 80... Low input protection circuit, 82... First transistor, 90... Second transistor, 98... Feedback circuit. Figures 2-3

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 電源電圧の立ち上り状態を検出する第１のトランジスタ
と、このトランジスタの動作に応動してスイッチング電
源装置に設置されたスイッチング制御回路の動作を制御
する第２のトランジスタと、第１のトランジスタを流れ
る電流を第１のトランジスタのベース側に正帰還し第１
のトランジスタのスイッチング動作を遅延させる帰還回
路とから構成したことを特徴とするスイッチング電源装
置の低入力保護回路。A first transistor that detects a rising state of the power supply voltage, a second transistor that controls the operation of a switching control circuit installed in the switching power supply device in response to the operation of this transistor, and a current that flows through the first transistor. is positively fed back to the base side of the first transistor.
A low input protection circuit for a switching power supply device, comprising a feedback circuit for delaying the switching operation of a transistor.
JP13092083U 1983-08-24 1983-08-24 Low input protection circuit for switching power supplies Pending JPS6038080U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13092083U JPS6038080U (en) 1983-08-24 1983-08-24 Low input protection circuit for switching power supplies

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13092083U JPS6038080U (en) 1983-08-24 1983-08-24 Low input protection circuit for switching power supplies

Publications (1)

Publication Number Publication Date
JPS6038080U true JPS6038080U (en) 1985-03-16

Family

ID=30296157

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13092083U Pending JPS6038080U (en) 1983-08-24 1983-08-24 Low input protection circuit for switching power supplies

Country Status (1)

Country Link
JP (1) JPS6038080U (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5288751A (en) * 1976-01-19 1977-07-25 Denki Onkyo Co Ltd Switching regulato protector

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5288751A (en) * 1976-01-19 1977-07-25 Denki Onkyo Co Ltd Switching regulato protector

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