JPS57130128A - Switching power supply circuit - Google Patents

Switching power supply circuit

Info

Publication number
JPS57130128A
JPS57130128A JP1646781A JP1646781A JPS57130128A JP S57130128 A JPS57130128 A JP S57130128A JP 1646781 A JP1646781 A JP 1646781A JP 1646781 A JP1646781 A JP 1646781A JP S57130128 A JPS57130128 A JP S57130128A
Authority
JP
Japan
Prior art keywords
circuit
output
voltage
overvoltage
power supply
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
JP1646781A
Other languages
Japanese (ja)
Other versions
JPS6252552B2 (en
Inventor
Kiyonobu Hayazaki
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
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP1646781A priority Critical patent/JPS57130128A/en
Publication of JPS57130128A publication Critical patent/JPS57130128A/en
Publication of JPS6252552B2 publication Critical patent/JPS6252552B2/ja
Granted 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
    • H02M3/33507—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 with automatic control of the output voltage or current, e.g. flyback converters

Landscapes

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

Abstract

PURPOSE:To divide the output of the overvoltage detecting circuit of a switching power supply circuit into two and connect one output to the gate of a switching transistor to perform a quick-response operation and connect the other to an integrating circuit to perform a time-lagged operation. CONSTITUTION:A voltage converting circuit 13, a smoothing circuit 14, and a voltage controlling circuit 17 constitute an output voltage control loop, and the voltage converting circuit 13 is driven by the output of the controlling circuit 17 to stabilize the power supply output. When an overvoltage is generated between output terminals (c) and (d), an overvoltage detecting circuit 18 is operated, and the inhibition gate of the voltage converting circuit 13 is closed by one output of outputs of the circuit 18 to stop the operation of the circuit 13, thus preventing the increment of the output voltage. The other output of the overvoltage detecting circuit 18 is supplied to an integrating circuit 16; and when a short-time overvoltage which does not reach a reference voltage of a voltage comparing circuit 15 is generated many times continuously to exceed the reference voltage of the circuit 15, an alarm is transmitted to a part 11 through a driving circuit 12, and the inhibition gate of the voltage converting circuit 13 is closed to stop the operation.
JP1646781A 1981-02-06 1981-02-06 Switching power supply circuit Granted JPS57130128A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1646781A JPS57130128A (en) 1981-02-06 1981-02-06 Switching power supply circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1646781A JPS57130128A (en) 1981-02-06 1981-02-06 Switching power supply circuit

Publications (2)

Publication Number Publication Date
JPS57130128A true JPS57130128A (en) 1982-08-12
JPS6252552B2 JPS6252552B2 (en) 1987-11-05

Family

ID=11917056

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1646781A Granted JPS57130128A (en) 1981-02-06 1981-02-06 Switching power supply circuit

Country Status (1)

Country Link
JP (1) JPS57130128A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988001806A1 (en) * 1986-08-30 1988-03-10 Fanuc Ltd Switching power source device
JP2009066585A (en) * 2007-09-11 2009-04-02 Ind Technol Res Inst Dehumidifier having cold air function

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988001806A1 (en) * 1986-08-30 1988-03-10 Fanuc Ltd Switching power source device
JP2009066585A (en) * 2007-09-11 2009-04-02 Ind Technol Res Inst Dehumidifier having cold air function

Also Published As

Publication number Publication date
JPS6252552B2 (en) 1987-11-05

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