JPH03126315A - Driving circuit for switching regulator - Google Patents

Driving circuit for switching regulator

Info

Publication number
JPH03126315A
JPH03126315A JP1265618A JP26561889A JPH03126315A JP H03126315 A JPH03126315 A JP H03126315A JP 1265618 A JP1265618 A JP 1265618A JP 26561889 A JP26561889 A JP 26561889A JP H03126315 A JPH03126315 A JP H03126315A
Authority
JP
Japan
Prior art keywords
auxiliary
driving circuit
trs
switching
voltage
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
JP1265618A
Other languages
Japanese (ja)
Inventor
Kazushige Kobayashi
Kiyoshi Komazawa
Katsuto Maruyama
Original Assignee
Nagano Japan Radio Co
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 Nagano Japan Radio Co filed Critical Nagano Japan Radio Co
Priority to JP1265618A priority Critical patent/JPH03126315A/en
Publication of JPH03126315A publication Critical patent/JPH03126315A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To surely prevent malfunction of a switching element at the time of turning on a power supply power and to improve the reliability of a driving circuit by connecting an auxiliary transistor(TR) protecting a switching element of the driving circuit of a switching regulator.
CONSTITUTION: The emitter E and the collector C of PNP auxiliary TRs 2... are connected respectively to the gate G and the source S of FETs 11... and the base B of the auxiliary TRs 2... is connected to the input of input resistors 6... connecting in series to a gate G of the FETs 11.... Thus, even when a steep voltage Vi is fed to the FET 11 at application of power and the voltage Vi is fed to the gate G, a voltage drop is caused in the input resistors 6... based on a voltage Vg and the emitter E of the auxiliary TRs 2... and the base B are biased, a current flows while bypassing the auxiliary TRs 2... and the FET 11 is not turned on. Thus, malfunction of the switching element at the time of turning or the power supply is prevented and the reliability of the driving circuit is improved.
COPYRIGHT: (C)1991,JPO&Japio
JP1265618A 1989-10-12 1989-10-12 Driving circuit for switching regulator Pending JPH03126315A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1265618A JPH03126315A (en) 1989-10-12 1989-10-12 Driving circuit for switching regulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1265618A JPH03126315A (en) 1989-10-12 1989-10-12 Driving circuit for switching regulator

Publications (1)

Publication Number Publication Date
JPH03126315A true JPH03126315A (en) 1991-05-29

Family

ID=17419638

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1265618A Pending JPH03126315A (en) 1989-10-12 1989-10-12 Driving circuit for switching regulator

Country Status (1)

Country Link
JP (1) JPH03126315A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5648720A (en) * 1979-09-28 1981-05-02 Hitachi Ltd Inductive load driving circuit
JPH01155715A (en) * 1987-12-11 1989-06-19 Fuji Electric Co Ltd Gate drive circuit for semiconductor switching element

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5648720A (en) * 1979-09-28 1981-05-02 Hitachi Ltd Inductive load driving circuit
JPH01155715A (en) * 1987-12-11 1989-06-19 Fuji Electric Co Ltd Gate drive circuit for semiconductor switching element

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