JPS6450755A - Switching power supply - Google Patents
Switching power supplyInfo
- Publication number
- JPS6450755A JPS6450755A JP20688287A JP20688287A JPS6450755A JP S6450755 A JPS6450755 A JP S6450755A JP 20688287 A JP20688287 A JP 20688287A JP 20688287 A JP20688287 A JP 20688287A JP S6450755 A JPS6450755 A JP S6450755A
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- predrive
- state
- power switch
- main drive
- 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 reduce transient current when the power supply is to put to work, by actuating a predrive device in turning OFF a power switch and by operating a switching transistor with this output. CONSTITUTION:A switching power supply is composed of a predrive device 6a, a main drive device 6b, a changeover device 7 to change over the drive input, etc. In an ON state of a power switch 2, the changeover device 7 connects the predrive device 6a to a switching transistor(Tr) 4, while in its OFF state the changeover device 7 is changed over to connect the main drive device 6b to the Tr 4. The Tr 4 is driven by the main drive device 6b. Thus, since the predrive device 6a is actuating in the OFF state of the power switch 2, no switching frequency will rise from 0 when it is ON, and the rush current on the primary side eased.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20688287A JPS6450755A (en) | 1987-08-19 | 1987-08-19 | Switching power supply |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20688287A JPS6450755A (en) | 1987-08-19 | 1987-08-19 | Switching power supply |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6450755A true JPS6450755A (en) | 1989-02-27 |
Family
ID=16530609
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20688287A Pending JPS6450755A (en) | 1987-08-19 | 1987-08-19 | Switching power supply |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6450755A (en) |
-
1987
- 1987-08-19 JP JP20688287A patent/JPS6450755A/en active Pending
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