JPH03190561A - Power source voltage monitor for flyback converter - Google Patents

Power source voltage monitor for flyback converter

Info

Publication number
JPH03190561A
JPH03190561A JP32713889A JP32713889A JPH03190561A JP H03190561 A JPH03190561 A JP H03190561A JP 32713889 A JP32713889 A JP 32713889A JP 32713889 A JP32713889 A JP 32713889A JP H03190561 A JPH03190561 A JP H03190561A
Authority
JP
Japan
Prior art keywords
voltage
power source
voltage value
transistor
battery power
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.)
Granted
Application number
JP32713889A
Other languages
Japanese (ja)
Other versions
JP2844481B2 (en
Inventor
Seiichi Kijima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kijima Co Ltd
Original Assignee
Kijima Co 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
Application filed by Kijima Co Ltd filed Critical Kijima Co Ltd
Priority to JP32713889A priority Critical patent/JP2844481B2/en
Publication of JPH03190561A publication Critical patent/JPH03190561A/en
Application granted granted Critical
Publication of JP2844481B2 publication Critical patent/JP2844481B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PURPOSE: To secure feeding voltage to a load circuit requiring a constant voltage and allow variation in a range exceeding this feeding voltage, by switching from the first state to the second state corresponding to the DC voltage of a battery power source, and turning off a switching device, when this DC voltage has dropped to a specified voltage value.
CONSTITUTION: When a battery power source 13 is a specified voltage value or higher, a transistor 30 is turned on as a zener diode 27 detecting this voltage value turns on. And when the voltage of the battery power source 13 drops and reaches a specified voltage value, the zener diode 27 having detected this voltage value turns off, a transistor 28 turns off in a state of an oscillation start signal So being base-inputted, and the voltage of a resistor 29 disappeares turning a transistor 30 off.
COPYRIGHT: (C)1991,JPO&Japio
JP32713889A 1989-12-19 1989-12-19 Power supply voltage monitoring device for flyback converter Expired - Fee Related JP2844481B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP32713889A JP2844481B2 (en) 1989-12-19 1989-12-19 Power supply voltage monitoring device for flyback converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP32713889A JP2844481B2 (en) 1989-12-19 1989-12-19 Power supply voltage monitoring device for flyback converter

Publications (2)

Publication Number Publication Date
JPH03190561A true JPH03190561A (en) 1991-08-20
JP2844481B2 JP2844481B2 (en) 1999-01-06

Family

ID=18195741

Family Applications (1)

Application Number Title Priority Date Filing Date
JP32713889A Expired - Fee Related JP2844481B2 (en) 1989-12-19 1989-12-19 Power supply voltage monitoring device for flyback converter

Country Status (1)

Country Link
JP (1) JP2844481B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102508004A (en) * 2011-11-15 2012-06-20 中国航空工业集团公司第六三一研究所 Power voltage monitoring circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102508004A (en) * 2011-11-15 2012-06-20 中国航空工业集团公司第六三一研究所 Power voltage monitoring circuit

Also Published As

Publication number Publication date
JP2844481B2 (en) 1999-01-06

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Legal Events

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