JPS6460262A - Switching regulator - Google Patents

Switching regulator

Info

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
Application number
JP21711187A
Other languages
Japanese (ja)
Inventor
Toshiyuki Zaitsu
Tokujiro Seki
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.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp filed Critical NEC Corp
Priority to JP21711187A priority Critical patent/JPS6460262A/en
Publication of JPS6460262A publication Critical patent/JPS6460262A/en
Pending legal-status Critical Current

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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.
JP21711187A 1987-08-31 1987-08-31 Switching regulator Pending JPS6460262A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0767343A (en) * 1993-04-01 1995-03-10 Nec Corp Synchronous rectifying circuit

Cited By (1)

* Cited by examiner, † Cited by third party
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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