KR970028931A - Power supply circuit to stabilize output voltage - Google Patents

Power supply circuit to stabilize output voltage Download PDF

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Publication number
KR970028931A
KR970028931A KR1019950045370A KR19950045370A KR970028931A KR 970028931 A KR970028931 A KR 970028931A KR 1019950045370 A KR1019950045370 A KR 1019950045370A KR 19950045370 A KR19950045370 A KR 19950045370A KR 970028931 A KR970028931 A KR 970028931A
Authority
KR
South Korea
Prior art keywords
power supply
overvoltage
transformer
supply circuit
output
Prior art date
Application number
KR1019950045370A
Other languages
Korean (ko)
Inventor
박충원
Original Assignee
이형도
삼성전기 주식회사
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 이형도, 삼성전기 주식회사 filed Critical 이형도
Priority to KR1019950045370A priority Critical patent/KR970028931A/en
Publication of KR970028931A publication Critical patent/KR970028931A/en

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Abstract

이 발명은 트랜스와 이 트랜스의 일측에 연결되어 트랜스의 입력전압 듀디비를 제어하는 SMPS를 구비한 전원공급회로에 있어서, 트랜스에서 유기된 출력전압을 검출하여 기준전압과 비교한 후 과전압이 발생했을때만 포토커플러를 도통시켜 SMPS에 입력되는 전압 듀티비를 제어하는 것을 특징으로 한다.The present invention provides a power supply circuit having a transformer and an SMPS connected to one side of the transformer to control the input voltage duty ratio of the transformer, wherein an output voltage generated by the transformer is detected and compared with a reference voltage to generate an overvoltage. Only when the photocoupler is turned on to control the voltage duty ratio input to the SMPS.

Description

출력전압을 안정화시키는 전원공급회로Power supply circuit to stabilize output voltage

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제2도는 이 발명을 나타낸 전원공급회로도이다.2 is a power supply circuit diagram showing this invention.

Claims (3)

입력전압을 유지시키기 위한 트랜스와 상기 트랜스의 일측에 연결되어 입력전압의 듀티를 제어하기 위한 SMPS 회로를 구비한 전원공급회로에 있어서, 상기 트랜스의 2차측에 연결되어 상기 트랜스에 유기된 전류를 정류 및 평활하는 정류부, 상기 정류부의 출력전압을 기준전압과 비교하여 소정 레벨 이상의 차이가 있으면 과전압 제어신호를 출력하기 위한 과전압 검출부, 상기 과전압 검출부의 출력측과 상기 정류부 사이에 연결되어 상기 과전압 검출부에서 출력되는 과전압 제어신호가 있으면 이를 상기 MSPS 회로에 피드백시켜 제어하기 위한 과전압 제어부로 구성된 것을 특징으로 하는 출력전압을 안정화시키는 전원공급회로.A power supply circuit having a transformer for maintaining an input voltage and an SMPS circuit connected to one side of the transformer to control the duty of the input voltage, the power supply circuit being connected to the secondary side of the transformer to rectify the current induced in the transformer. And a smooth rectifier, an overvoltage detector for outputting an overvoltage control signal when there is a difference over a predetermined level by comparing the output voltage of the rectifier with a reference voltage, and connected between the output side of the overvoltage detector and the rectifier and output from the overvoltage detector. The power supply circuit for stabilizing the output voltage, characterized in that consisting of an overvoltage control unit for controlling the feedback signal if there is an overvoltage control signal to the MSPS circuit. 제1항에 있어서, 상기 과전압 검출부는 상기 트랜스의 출력전압과 기준전압을 서로 비교하여 출력하기 위한 증폭기와 상기 증폭기의 출력이 로우 레벨일때만 도통되는 정류소자로 구성된 것을 특징으로 하는 출력전압을 안정화시키는 전원공급회로.The stabilized output voltage according to claim 1, wherein the overvoltage detector includes an amplifier for comparing the output voltage and the reference voltage of the transformer with each other, and a rectifying element that is turned on only when the output of the amplifier is at a low level. Power supply circuit. 제1항에 있어서, 상기 과전압 제어부는 상기 과전압 검출부의 출력신호에 동작되어 상기 SMPS 회로에 전압 듀티 제어신호를 무선 송신하기 위한 발광 결합소자로 구성된 것을 특징으로 하는 출력전압을 안정화시키는 전원공급회로.The power supply circuit of claim 1, wherein the overvoltage control unit is configured to include a light emitting coupling element configured to operate on an output signal of the overvoltage detection unit to wirelessly transmit a voltage duty control signal to the SMPS circuit. ※ 참고사항:최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950045370A 1995-11-30 1995-11-30 Power supply circuit to stabilize output voltage KR970028931A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950045370A KR970028931A (en) 1995-11-30 1995-11-30 Power supply circuit to stabilize output voltage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950045370A KR970028931A (en) 1995-11-30 1995-11-30 Power supply circuit to stabilize output voltage

Publications (1)

Publication Number Publication Date
KR970028931A true KR970028931A (en) 1997-06-24

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ID=66593292

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950045370A KR970028931A (en) 1995-11-30 1995-11-30 Power supply circuit to stabilize output voltage

Country Status (1)

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KR (1) KR970028931A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9197123B2 (en) 2012-12-07 2015-11-24 Samsung Electro-Mechanics Co., Ltd. Power supplying apparatus having a detectable useful life

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9197123B2 (en) 2012-12-07 2015-11-24 Samsung Electro-Mechanics Co., Ltd. Power supplying apparatus having a detectable useful life

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E601 Decision to refuse application