KR940012776A - Switching mode power supply start circuit - Google Patents

Switching mode power supply start circuit Download PDF

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Publication number
KR940012776A
KR940012776A KR1019920021304A KR920021304A KR940012776A KR 940012776 A KR940012776 A KR 940012776A KR 1019920021304 A KR1019920021304 A KR 1019920021304A KR 920021304 A KR920021304 A KR 920021304A KR 940012776 A KR940012776 A KR 940012776A
Authority
KR
South Korea
Prior art keywords
voltage
winding
auxiliary
pulse width
power supply
Prior art date
Application number
KR1019920021304A
Other languages
Korean (ko)
Inventor
류한청
Original Assignee
정용문
삼성전자 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 정용문, 삼성전자 주식회사 filed Critical 정용문
Priority to KR1019920021304A priority Critical patent/KR940012776A/en
Publication of KR940012776A publication Critical patent/KR940012776A/en

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Abstract

스위칭 모드 파워 서플라이의 전력 손실을 줄이고 펄스폭 변조시 안정한 전압을 공급하여 전원장치의 효율을 개선하고 신뢰도를 높이는 회로에 관한 것이다. 변환수단에서 교류전압을 입력하여 직류전압으로 변환하고, 변압수단에서 제1권선에 유기되는 상기 직류전압을 제2권선으로 유기하여 부하전압을 발생하며 보조권선에 유기되는 상기 직류전압을 보조전압으로 발생하며, 펄스폭변조수단에서 상기 직류전압 혹은 상기 보조전압의 펄스폭을 변조하고, 스위칭수단에서 상기 펄스폭변조수단의 제어를 받아 상기 제1권선과 상기 보조권선의 전압 유기 시점이 서로 상반되도록 제어하되, 정전압수단이 상기 변환수단으로 부터 상기 변압수단으로 항상 일정한 정도의 직류전압이 공급되도록 제어하며, 차단수단은 상기 교류전압이 입력된 후 상기 보조전압이 발생될 때 까지만 상기 정전압을 상기 펄스폭변환 수단으로 전달하다.The present invention relates to a circuit for reducing power loss of a switching mode power supply and supplying a stable voltage during pulse width modulation to improve power supply efficiency and increase reliability. The converting means inputs an AC voltage to convert the DC voltage, and the transformer converts the DC voltage induced in the first winding into the second winding to generate a load voltage and converts the DC voltage induced in the auxiliary winding into the auxiliary voltage. And modulate the pulse width of the DC voltage or the auxiliary voltage in the pulse width modulating means, and under the control of the pulse width modulating means in the switching means so that the voltage induced time points of the first winding and the auxiliary winding are opposite to each other. The control unit controls the constant voltage means so that a constant DC voltage is always supplied from the converting means to the transformer means, and the blocking means pulses the constant voltage until the auxiliary voltage is generated after the AC voltage is input. Pass to width converting means

Description

스위칭 모드 파워 서플라이 기동회로Switching mode power supply start circuit

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

제2도는 본 발명에 따른 스위칭 모드 파워 서플라이 기동회로도.2 is a switching mode power supply start circuit according to the present invention.

Claims (2)

교류전압을 입력하여 직류전압으로 변환하는 변환수단과, 제1권선에 유기되는 상기 직류전압을 제2권선으로 유기하여 부하전압을 발생하며 보조권선에 유기되는 상기 직류전압을 보조전압으로 발생하기 위한 변압수단과, 상기 직류전압 혹은 상기 보조전압의 펄스폭을 변조하는 펄스폭변조수단과, 상기 펄스폭변조수단에 의해 스위칭되어 상기 제1권선과 상기 보조권선의 전압 유기 시점이 서로 상반되도록 제어하는 스위칭수단을 구비한 전원장치에 있어서, 상기 변환수단으로 부터 상기 변압수단으로 항상 일정한 정도의 직류 전압이 공급되도록 제어하기 위한 정전압수단과, 상기 교류전압이 입력된 후 상기 보조전압이 발생될 때 까지만 상기 정전압을 상기 펄스폭변환수단으로 전달하기 위한 차단수단으로 구성됨을 특징으로 하는 스위칭 모드 파워 서플라이 기동회로.Conversion means for inputting an AC voltage to convert the DC voltage; and generating a load voltage by inducing the DC voltage induced in the first winding to the second winding to generate a load voltage and generating the DC voltage induced in the auxiliary winding as an auxiliary voltage. A voltage conversion means, a pulse width modulation means for modulating a pulse width of the DC voltage or the auxiliary voltage, and a pulse width modulation means to control the voltage induced time points of the first winding and the auxiliary winding to be opposite to each other. A power supply having a switching means, comprising: constant voltage means for controlling a constant DC voltage to be supplied from said converting means to said transformer means at all times, and only until said auxiliary voltage is generated after said AC voltage is input; Switching mode, characterized in that consisting of a blocking means for transmitting the constant voltage to the pulse width conversion means Wars start-up supply circuit. 제1항에 있어서, 상기 차단수단이, 다이오드(D1)로 구성됨을 특징으로 하는 스위칭 모드 파워 서플라이 기동회로.2. The switching mode power supply starting circuit according to claim 1, wherein said blocking means comprises a diode (D1). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920021304A 1992-11-13 1992-11-13 Switching mode power supply start circuit KR940012776A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019920021304A KR940012776A (en) 1992-11-13 1992-11-13 Switching mode power supply start circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019920021304A KR940012776A (en) 1992-11-13 1992-11-13 Switching mode power supply start circuit

Publications (1)

Publication Number Publication Date
KR940012776A true KR940012776A (en) 1994-06-24

Family

ID=67210707

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019920021304A KR940012776A (en) 1992-11-13 1992-11-13 Switching mode power supply start circuit

Country Status (1)

Country Link
KR (1) KR940012776A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100685104B1 (en) * 2005-07-21 2007-02-22 주식회사 케이이씨 Switching Mode Power Supply

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100685104B1 (en) * 2005-07-21 2007-02-22 주식회사 케이이씨 Switching Mode Power Supply

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