JPS564820A - Switching power supply unit - Google Patents

Switching power supply unit

Info

Publication number
JPS564820A
JPS564820A JP8013079A JP8013079A JPS564820A JP S564820 A JPS564820 A JP S564820A JP 8013079 A JP8013079 A JP 8013079A JP 8013079 A JP8013079 A JP 8013079A JP S564820 A JPS564820 A JP S564820A
Authority
JP
Japan
Prior art keywords
output
voltage
trq3
power supply
output voltage
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
JP8013079A
Other languages
Japanese (ja)
Inventor
Kazuo Kametani
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.)
Toko Inc
Original Assignee
Toko Inc
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 Toko Inc filed Critical Toko Inc
Priority to JP8013079A priority Critical patent/JPS564820A/en
Publication of JPS564820A publication Critical patent/JPS564820A/en
Pending legal-status Critical Current

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  • Dc-Dc Converters (AREA)

Abstract

PURPOSE: To enable small sized capacity of transistor for constant voltage circuit, by controlling the switching transistor with the first output voltage and providing the constant voltage circuit driven with the output current after stabilization at the second output.
CONSTITUTION: The output of the DC power supply 7 is ON or OFF with the switching transistor (TR)Q1 to produce two output voltages 8, 9 at the secondary side of the transformer 1. Further, the reference voltage VRE1 and one output voltage 9 are compared at the comparator 1 to control TRQ1 and to stabilize the output voltage 9. Further, another output voltage 8 is made constant with the comparator 3, control circuit 14, and TRQ3. Further, the stabilization of one output current is detected with the transformer T2 and the control circuit 15 to turn on TRQ3. Thus, no start current flows to TRQ3, allowing to make small the capacity.
COPYRIGHT: (C)1981,JPO&Japio
JP8013079A 1979-06-27 1979-06-27 Switching power supply unit Pending JPS564820A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8013079A JPS564820A (en) 1979-06-27 1979-06-27 Switching power supply unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8013079A JPS564820A (en) 1979-06-27 1979-06-27 Switching power supply unit

Publications (1)

Publication Number Publication Date
JPS564820A true JPS564820A (en) 1981-01-19

Family

ID=13709637

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8013079A Pending JPS564820A (en) 1979-06-27 1979-06-27 Switching power supply unit

Country Status (1)

Country Link
JP (1) JPS564820A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4660133A (en) * 1984-08-07 1987-04-21 Siemens Aktiengesellschaft Switched power pack with free-wheeling flow converter and switched controller at a secondary side
JP2007195283A (en) * 2006-01-17 2007-08-02 Sanken Electric Co Ltd Multi-output switching power unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4660133A (en) * 1984-08-07 1987-04-21 Siemens Aktiengesellschaft Switched power pack with free-wheeling flow converter and switched controller at a secondary side
JP2007195283A (en) * 2006-01-17 2007-08-02 Sanken Electric Co Ltd Multi-output switching power unit

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