JPS55103081A - Switching power supply device - Google Patents
Switching power supply deviceInfo
- 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
Links
Landscapes
- Dc-Dc Converters (AREA)
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
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) |
-
1979
- 1979-01-29 JP JP901879A patent/JPS55103081A/en active Pending
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