JPS55103081A - Switching power supply device - Google Patents

Switching power supply device

Info

Publication number
JPS55103081A
JPS55103081A JP901879A JP901879A JPS55103081A JP S55103081 A JPS55103081 A JP S55103081A JP 901879 A JP901879 A JP 901879A JP 901879 A JP901879 A JP 901879A JP S55103081 A JPS55103081 A JP S55103081A
Authority
JP
Japan
Prior art keywords
voltage
power transistor
saw
toothed
generation circuit
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
JP901879A
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 JP901879A priority Critical patent/JPS55103081A/en
Publication of JPS55103081A publication Critical patent/JPS55103081A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To prevent voltage fluctuation due to load fluctuation, by providing a compensation voltage generating circuit which produces a DC voltage proportional to the output peak value of a saw-toothed voltage generating circuit synchronized with the turn-on of a power transistor and by controlling energy storage time.
CONSTITUTION: When a power transistor Q5 is turned on, a current i1 flows through the primary winding L1 to store energy in a transformer T and induce a voltage v1 across the quaternary winding L4. The voltage v1 is changed into a saw-toothed voltage v2 by a saw-toothed voltage generation circuit 2. When the power transistor Q5 is turned off, a current i2 flows through the secondary winding L2 to discharge the energy from the transformer T. The difference between the DC voltage VC of a compared voltage generation circuit 1 and a voltage produced by adding the Zener voltage VZ of a Zener diode DZ to the DC voltage VS of a compensation voltage generation circuit 3 changed by a load current IO is applied to the power transistor Q5 to keep an output voltage VO constant.
COPYRIGHT: (C)1980,JPO&Japio
JP901879A 1979-01-29 1979-01-29 Switching power supply device Pending JPS55103081A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP901879A JPS55103081A (en) 1979-01-29 1979-01-29 Switching power supply device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP901879A JPS55103081A (en) 1979-01-29 1979-01-29 Switching power supply device

Publications (1)

Publication Number Publication Date
JPS55103081A true JPS55103081A (en) 1980-08-06

Family

ID=11708907

Family Applications (1)

Application Number Title Priority Date Filing Date
JP901879A Pending JPS55103081A (en) 1979-01-29 1979-01-29 Switching power supply device

Country Status (1)

Country Link
JP (1) JPS55103081A (en)

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