JPH0376313A - Switching driver circuit - Google Patents

Switching driver circuit

Info

Publication number
JPH0376313A
JPH0376313A JP21225089A JP21225089A JPH0376313A JP H0376313 A JPH0376313 A JP H0376313A JP 21225089 A JP21225089 A JP 21225089A JP 21225089 A JP21225089 A JP 21225089A JP H0376313 A JPH0376313 A JP H0376313A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
varying
circuit
pulse
generating circuit
pulse generating
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
JP21225089A
Inventor
Kiyotaka Yamaguchi
Original Assignee
Nec 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

Links

Abstract

PURPOSE: To vary a load current without varying a power voltage by providing a timing circuit and a pulse generating circuit to a driver circuit, and varying a period of a pulse waveform or the duty cycle.
CONSTITUTION: A driver 3 is controlled by a timing circuit 2 and a pulse generating circuit 1 and turns on/off a transistor(TR) 4 to drive a load. With the pulse generating circuit 1 employing a programmable timer or the like, it varies the pulse period and the duty cycle. Then an output from the pulse generating circuit 1 and an output of the timing circuit 2 setting the driving time of the driver 3 are ANDed to turn on/off the TR 4. Thus, a current flows to the load 5 when the TR 4 is turned on and the load current is varied without varying the power supply voltage by varying the period of the pulse waveform or its duty cycle.
COPYRIGHT: (C)1991,JPO&Japio
JP21225089A 1989-08-18 1989-08-18 Switching driver circuit Pending JPH0376313A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21225089A JPH0376313A (en) 1989-08-18 1989-08-18 Switching driver circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21225089A JPH0376313A (en) 1989-08-18 1989-08-18 Switching driver circuit

Publications (1)

Publication Number Publication Date
JPH0376313A true true JPH0376313A (en) 1991-04-02

Family

ID=16619460

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21225089A Pending JPH0376313A (en) 1989-08-18 1989-08-18 Switching driver circuit

Country Status (1)

Country Link
JP (1) JPH0376313A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6198264B1 (en) 1999-01-21 2001-03-06 Fijitsu Limited Maximum duty ratio setting circuit for a DC-DC converter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6198264B1 (en) 1999-01-21 2001-03-06 Fijitsu Limited Maximum duty ratio setting circuit for a DC-DC converter

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