JPS5612862A - Switching power supply - Google Patents

Switching power supply

Info

Publication number
JPS5612862A
JPS5612862A JP8803079A JP8803079A JPS5612862A JP S5612862 A JPS5612862 A JP S5612862A JP 8803079 A JP8803079 A JP 8803079A JP 8803079 A JP8803079 A JP 8803079A JP S5612862 A JPS5612862 A JP S5612862A
Authority
JP
Japan
Prior art keywords
transistor
output
control
power supply
switching power
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.)
Granted
Application number
JP8803079A
Other languages
Japanese (ja)
Other versions
JPS5924627B2 (en
Inventor
Motoyoshi Fujita
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.)
TDK Corp
Original Assignee
TDK 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 TDK Corp filed Critical TDK Corp
Priority to JP8803079A priority Critical patent/JPS5924627B2/en
Publication of JPS5612862A publication Critical patent/JPS5612862A/en
Publication of JPS5924627B2 publication Critical patent/JPS5924627B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/338—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement
    • H02M3/3385—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement with automatic control of output voltage or current

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

PURPOSE:To simply carry out an output control of a switching power supply upon change of the switching frequency in operation by employing a saturable transformer having a property of varying an output waveform duty cycle in response to the alteration of an input frequency. CONSTITUTION:An oscillator circuit 20 consists of a switching transistor TR21, primary winding 30A of a saturable transformer 30 inserted into the collector side of the transistor, and a feedback winding 30B and the like. The oscillation output is presented at the secondary winding 30C of the transformer 30, is rectified and smoothed through a rectifier and smoothing circuit 40, and is then supplied to output terminals C, D. On the other hand, a control circuit 70 is provided in the base circuit of the transistor TR21 to control the switching frequency of the operation of the transistor TR21, negative voltage is produced through a diode 71 with respect to the emitter of the TR21 from the feedback winding 30B, is smoothed through a capacitor 72, and is then applied through a controlled TR73 to the base of the TR21. In this manner it can simply control the output of the switching power supply.
JP8803079A 1979-07-13 1979-07-13 switching power supply Expired JPS5924627B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8803079A JPS5924627B2 (en) 1979-07-13 1979-07-13 switching power supply

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8803079A JPS5924627B2 (en) 1979-07-13 1979-07-13 switching power supply

Publications (2)

Publication Number Publication Date
JPS5612862A true JPS5612862A (en) 1981-02-07
JPS5924627B2 JPS5924627B2 (en) 1984-06-11

Family

ID=13931416

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8803079A Expired JPS5924627B2 (en) 1979-07-13 1979-07-13 switching power supply

Country Status (1)

Country Link
JP (1) JPS5924627B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4486822A (en) * 1982-02-17 1984-12-04 U.S. Philips Corporation Switched-mode self oscillating supply voltage circuit
EP0291742A2 (en) * 1987-05-20 1988-11-23 International Business Machines Corporation Power supply device with a blocking oscillator
FR2773280A1 (en) * 1997-12-31 1999-07-02 Samsung Electronics Co Ltd SWITCHED MODE POWER SUPPLY

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4486822A (en) * 1982-02-17 1984-12-04 U.S. Philips Corporation Switched-mode self oscillating supply voltage circuit
EP0291742A2 (en) * 1987-05-20 1988-11-23 International Business Machines Corporation Power supply device with a blocking oscillator
FR2773280A1 (en) * 1997-12-31 1999-07-02 Samsung Electronics Co Ltd SWITCHED MODE POWER SUPPLY

Also Published As

Publication number Publication date
JPS5924627B2 (en) 1984-06-11

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