JPS6460262A - Switching regulator - Google Patents
Switching regulatorInfo
- Publication number
- JPS6460262A JPS6460262A JP21711187A JP21711187A JPS6460262A JP S6460262 A JPS6460262 A JP S6460262A JP 21711187 A JP21711187 A JP 21711187A JP 21711187 A JP21711187 A JP 21711187A JP S6460262 A JPS6460262 A JP S6460262A
- Authority
- JP
- Japan
- Prior art keywords
- fet
- switching regulator
- primary
- switch
- transformer
- 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 improve the efficiency and to reduce the size of a switching regulator, by arranging a FET switch circuit for controlling a portion of output to be fed to the load side during ON interval of a primary switch at the secondary of the switching regulator. CONSTITUTION:A switching regulator comprises a DC power source 1, a transformer 2 having primary and secondary windings NP, NS, a switching means or a FET switch 3, smoothing circuits 7-9, etc., and feeds power to a load resistor 18. Furthermore, FET switches 4-5 inserted between the secondary winding NS and a diode 7, a sawtooth wave generating circuit 14, a comparator 11 for comparing voltages VZ divided through resistors 12-13, a photocoupler 10, a switch element drive winding NG, a diode 15, a drive circuit 6, etc., are provided. When FET 3 at the primary of the transformer 2 is turned ON/OFF, voltage VS is induced in the secondary winding NS, and a drive circuit 6 is controlled through the photocouplers 10, 17 to turn FET 4-5 ON/OFF so as to carry out pulse width control thus producing a stable output voltage.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21711187A JPS6460262A (en) | 1987-08-31 | 1987-08-31 | Switching regulator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21711187A JPS6460262A (en) | 1987-08-31 | 1987-08-31 | Switching regulator |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6460262A true JPS6460262A (en) | 1989-03-07 |
Family
ID=16699022
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21711187A Pending JPS6460262A (en) | 1987-08-31 | 1987-08-31 | Switching regulator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6460262A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0767343A (en) * | 1993-04-01 | 1995-03-10 | Nec Corp | Synchronous rectifying circuit |
-
1987
- 1987-08-31 JP JP21711187A patent/JPS6460262A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0767343A (en) * | 1993-04-01 | 1995-03-10 | Nec Corp | Synchronous rectifying circuit |
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