JPH02197253A - Chopper apparatus - Google Patents

Chopper apparatus

Info

Publication number
JPH02197253A
JPH02197253A JP1736089A JP1736089A JPH02197253A JP H02197253 A JPH02197253 A JP H02197253A JP 1736089 A JP1736089 A JP 1736089A JP 1736089 A JP1736089 A JP 1736089A JP H02197253 A JPH02197253 A JP H02197253A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
circuit
output voltage
voltage detection
drive stopping
abnormality
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
JP1736089A
Inventor
Akinori Hiramatsu
Hiroshi Kido
Original Assignee
Matsushita Electric Works Ltd
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

Links

Abstract

PURPOSE: To enable an accurate overvoltage protection by providing an abnormal voltage detection and drive stopping circuit for detecting the abnormality of an output voltage or detected output to stop the ON-OFF operation of a switching element.
CONSTITUTION: The title apparatus is the addition of an abnormal voltage detection and drive stopping circuit 8 to the circuit used heretofore, and said abnormal voltage detection and drive stopping circuit 8 is composed of a comparator IC2, a diode D3, resistor R15, R16, R17, a capacitor C6, etc. Then, said circuit 8 detects the abnormality of an output voltage Vo or that of output voltage sensing circuit 4 to stop the ON-OFF operation of a switching element Q1. Thus, an overvoltage protection such as prevention of an adverse effect on a load 3 can be performed securely.
COPYRIGHT: (C)1990,JPO&Japio
JP1736089A 1989-01-26 1989-01-26 Chopper apparatus Pending JPH02197253A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1736089A JPH02197253A (en) 1989-01-26 1989-01-26 Chopper apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1736089A JPH02197253A (en) 1989-01-26 1989-01-26 Chopper apparatus

Publications (1)

Publication Number Publication Date
JPH02197253A true true JPH02197253A (en) 1990-08-03

Family

ID=11941875

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1736089A Pending JPH02197253A (en) 1989-01-26 1989-01-26 Chopper apparatus

Country Status (1)

Country Link
JP (1) JPH02197253A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6198258B1 (en) 1999-04-28 2001-03-06 Rohm Co., Ltd. DC-DC converter capable of soft starting function by slowly raising reference voltage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6198258B1 (en) 1999-04-28 2001-03-06 Rohm Co., Ltd. DC-DC converter capable of soft starting function by slowly raising reference voltage

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