JPS5771271A - Dc-dc converter - Google Patents

Dc-dc converter

Info

Publication number
JPS5771271A
JPS5771271A JP14781280A JP14781280A JPS5771271A JP S5771271 A JPS5771271 A JP S5771271A JP 14781280 A JP14781280 A JP 14781280A JP 14781280 A JP14781280 A JP 14781280A JP S5771271 A JPS5771271 A JP S5771271A
Authority
JP
Japan
Prior art keywords
transistor
transformer
resistor
diode
primary side
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
JP14781280A
Other languages
Japanese (ja)
Inventor
Michio Kono
Kenichi Katsuyama
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP14781280A priority Critical patent/JPS5771271A/en
Publication of JPS5771271A publication Critical patent/JPS5771271A/en
Pending 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

Landscapes

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

Abstract

PURPOSE:To unnecessitate the use of the transistor having a large capacity by a method wherein the parallel circuit of a diode and a resistor is connected in series to the primary side of the transformer, and the instantaneous excessive current flowing in the transistor is blocked. CONSTITUTION:The DC-DC converter is constituted by connecting a switching transistor Tr1 to the primary side of the transformer T, and at the same time, the series circuits of a diode D2, the parallel circuit of the resistor R1, a capacitor C1 and the primary side winding of the transistor T are connected to the collector of the transistor Tr1. Accordingly, the output is generated on the secondary side by applying voltage on the transformer T, through the intermediary of the diode D2, when the transistor TR1 is positioned at OFF, the voltage obtained by the capacitor C1 and the parastic capacity of the transistor T is short-circuited by the resistor R1, and the instantaneous excessive current can be prevented, thereby enabling to prevent the breakage and the like of the transistor Tr1.
JP14781280A 1980-10-22 1980-10-22 Dc-dc converter Pending JPS5771271A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14781280A JPS5771271A (en) 1980-10-22 1980-10-22 Dc-dc converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14781280A JPS5771271A (en) 1980-10-22 1980-10-22 Dc-dc converter

Publications (1)

Publication Number Publication Date
JPS5771271A true JPS5771271A (en) 1982-05-04

Family

ID=15438767

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14781280A Pending JPS5771271A (en) 1980-10-22 1980-10-22 Dc-dc converter

Country Status (1)

Country Link
JP (1) JPS5771271A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60148375A (en) * 1984-01-11 1985-08-05 Densetsu Kiki Kogyo Kk Switching power source circuit
EP1796239A1 (en) * 2005-12-08 2007-06-13 Funai Electric Co., Ltd. Electric circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60148375A (en) * 1984-01-11 1985-08-05 Densetsu Kiki Kogyo Kk Switching power source circuit
EP1796239A1 (en) * 2005-12-08 2007-06-13 Funai Electric Co., Ltd. Electric circuit
US7593197B2 (en) 2005-12-08 2009-09-22 Funai Electric Co., Ltd Electric circuit

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