JPH0433571A - Switching power source - Google Patents

Switching power source

Info

Publication number
JPH0433571A
JPH0433571A JP13750690A JP13750690A JPH0433571A JP H0433571 A JPH0433571 A JP H0433571A JP 13750690 A JP13750690 A JP 13750690A JP 13750690 A JP13750690 A JP 13750690A JP H0433571 A JPH0433571 A JP H0433571A
Authority
JP
Japan
Prior art keywords
voltage side
low voltage
high voltage
output
fed back
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
JP13750690A
Other languages
Japanese (ja)
Inventor
Shuji Yamamoto
Kiyouji Toshinari
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.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing 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 Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Priority to JP13750690A priority Critical patent/JPH0433571A/en
Publication of JPH0433571A publication Critical patent/JPH0433571A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To stabilize a low voltage side which is not controlled to be fed back by feeding back an output voltage of a high voltage side to a primary side, and controlling to stabilize a low voltage side by the high voltage side.
CONSTITUTION: An output voltage V1 of a high voltage side is fed back to a primary side by using a voltage divider 14. A Zener diode 21 is connected between the high voltage side and a low voltage side through resistors 23, 24. A transistor 22 is connected between both output lines through a resistor 25. The voltage V1 of the high voltage side which is controlled to be fed back becomes substantially constant. If a load of a low voltage side becomes heavy, an output voltage V2 of a low voltage side is lowered. If a difference between the voltages V1 and V2 becomes a predetermined value or higher, the diode 21 is turned ON, a dummy current ID is supplied from the high voltage side of a transistor 22 to a low voltage side to suppress a decrease in the output voltage of the low voltage side to be stabilized.
COPYRIGHT: (C)1992,JPO&Japio
JP13750690A 1990-05-28 1990-05-28 Switching power source Pending JPH0433571A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13750690A JPH0433571A (en) 1990-05-28 1990-05-28 Switching power source

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13750690A JPH0433571A (en) 1990-05-28 1990-05-28 Switching power source

Publications (1)

Publication Number Publication Date
JPH0433571A true JPH0433571A (en) 1992-02-04

Family

ID=15200260

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13750690A Pending JPH0433571A (en) 1990-05-28 1990-05-28 Switching power source

Country Status (1)

Country Link
JP (1) JPH0433571A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002272108A (en) * 2001-03-09 2002-09-20 Nichicon Corp Switching power supply
JP2007159304A (en) * 2005-12-07 2007-06-21 Matsushita Electric Ind Co Ltd Power supply
JP2009254180A (en) * 2008-04-09 2009-10-29 Reitec Co Ltd Power device for cutting and welding
KR101257704B1 (en) * 2007-03-22 2013-04-24 삼성전자주식회사 A multi-output SMPS protection circuit
US8644036B2 (en) 2009-02-02 2014-02-04 Sanken Electric Co., Ltd. Multi-output switching power supply device having a step-up/down converter between a stabilized output and a non-stabilized output
CN110649816A (en) * 2019-09-20 2020-01-03 广州金升阳科技有限公司 Step-down switch converter

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002272108A (en) * 2001-03-09 2002-09-20 Nichicon Corp Switching power supply
JP2007159304A (en) * 2005-12-07 2007-06-21 Matsushita Electric Ind Co Ltd Power supply
KR101257704B1 (en) * 2007-03-22 2013-04-24 삼성전자주식회사 A multi-output SMPS protection circuit
JP2009254180A (en) * 2008-04-09 2009-10-29 Reitec Co Ltd Power device for cutting and welding
US8644036B2 (en) 2009-02-02 2014-02-04 Sanken Electric Co., Ltd. Multi-output switching power supply device having a step-up/down converter between a stabilized output and a non-stabilized output
CN110649816A (en) * 2019-09-20 2020-01-03 广州金升阳科技有限公司 Step-down switch converter

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