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JPS6412816A - Overvoltage protective circuit of switching regulator - Google Patents

Overvoltage protective circuit of switching regulator

Info

Publication number
JPS6412816A
JPS6412816A JP16836687A JP16836687A JPS6412816A JP S6412816 A JPS6412816 A JP S6412816A JP 16836687 A JP16836687 A JP 16836687A JP 16836687 A JP16836687 A JP 16836687A JP S6412816 A JPS6412816 A JP S6412816A
Authority
JP
Japan
Prior art keywords
voltage
output
inverter transistor
circuit
protective circuit
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
JP16836687A
Other languages
Japanese (ja)
Other versions
JPH0636650B2 (en
Inventor
Masaru Teragaki
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.)
Cosel Co Ltd
Original Assignee
Elco 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 Elco Co Ltd filed Critical Elco Co Ltd
Priority to JP62168366A priority Critical patent/JPH0636650B2/en
Publication of JPS6412816A publication Critical patent/JPS6412816A/en
Publication of JPH0636650B2 publication Critical patent/JPH0636650B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Protection Of Static Devices (AREA)
  • Dc-Dc Converters (AREA)

Abstract

PURPOSE:To make it an overvoltage protective circuit stable and with high accuracy, by keeping the operating voltage of overvoltage approximately constant, even if the flyback voltage and duty ratio vary. CONSTITUTION:The voltage of an input voltage source 1 is made pulsative with an inverter transistor 7. After transformed with an output transformer 3, it is rectified and smoothed with a diode 4 and a capacitor 5 and supplied to a load 18. An output voltage controlling circuit 2 controls the inverter transistor 7 so that the output voltage may be kept constant. If the flyback voltage generated at a detection winding 6 in turning OFF the inverter transistor 7 exceeds the reference voltage Vref1, a comparator 20 will generate a pulse of the predetermined voltage. This pulse is levelled off with a levelling-off circuit 28, and if its value exceeds the reference voltage Vref2, the output of a comparator 30 will be given to the output controlling circuit 2 so as to stop the operation of an converter or to drop the output voltage.
JP62168366A 1987-07-06 1987-07-06 Overvoltage protection circuit for switching regulator Expired - Lifetime JPH0636650B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62168366A JPH0636650B2 (en) 1987-07-06 1987-07-06 Overvoltage protection circuit for switching regulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62168366A JPH0636650B2 (en) 1987-07-06 1987-07-06 Overvoltage protection circuit for switching regulator

Publications (2)

Publication Number Publication Date
JPS6412816A true JPS6412816A (en) 1989-01-17
JPH0636650B2 JPH0636650B2 (en) 1994-05-11

Family

ID=15866754

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62168366A Expired - Lifetime JPH0636650B2 (en) 1987-07-06 1987-07-06 Overvoltage protection circuit for switching regulator

Country Status (1)

Country Link
JP (1) JPH0636650B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007018321A1 (en) * 2005-12-26 2007-02-15 Toyota Jidosha Kabushiki Kaisha Vehicle control device, vehicle, and vehicle control method
JP2011062002A (en) * 2009-09-11 2011-03-24 Asahi Kasei Toko Power Device Corp Overvoltage protection circuit

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56121366A (en) * 1980-02-27 1981-09-24 Yokogawa Hokushin Electric Corp Switching regulator
JPS62104589U (en) * 1985-12-21 1987-07-03

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56121366A (en) * 1980-02-27 1981-09-24 Yokogawa Hokushin Electric Corp Switching regulator
JPS62104589U (en) * 1985-12-21 1987-07-03

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007018321A1 (en) * 2005-12-26 2007-02-15 Toyota Jidosha Kabushiki Kaisha Vehicle control device, vehicle, and vehicle control method
JP2011062002A (en) * 2009-09-11 2011-03-24 Asahi Kasei Toko Power Device Corp Overvoltage protection circuit

Also Published As

Publication number Publication date
JPH0636650B2 (en) 1994-05-11

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