KR970077925A - The power supply circuit of the switching mode power supply - Google Patents

The power supply circuit of the switching mode power supply Download PDF

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Publication number
KR970077925A
KR970077925A KR1019960015200A KR19960015200A KR970077925A KR 970077925 A KR970077925 A KR 970077925A KR 1019960015200 A KR1019960015200 A KR 1019960015200A KR 19960015200 A KR19960015200 A KR 19960015200A KR 970077925 A KR970077925 A KR 970077925A
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KR
South Korea
Prior art keywords
power
power supply
pwm
unit
output
Prior art date
Application number
KR1019960015200A
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Korean (ko)
Inventor
심재규
Original Assignee
김광호
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.)
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Publication date
Application filed by 김광호, 삼성전자 주식회사 filed Critical 김광호
Priority to KR1019960015200A priority Critical patent/KR970077925A/en
Publication of KR970077925A publication Critical patent/KR970077925A/en

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Abstract

본 발명은 전원 스위치를 온하는 초기에 PWM용 집적소자에 안정된 초기 동작전원을 공급하는 것이다.The present invention supplies stable initial operating power to the integrated circuit for PWM at the initial stage of turning on the power switch.

본 발명은 전원 스위치를 온함에 따라 공급되는 교류전원으로 PWM 집적 소자에 직접 동작전원을 공급하는 것으로서, 교류전원을 정류하고, 이를 평활한 후 PWM 집적소자의 전원단자에 공급함으로써 별도로 전력 용량이 높은 고가의 저항 사용할 필요가 없음은 물론 발생되는 열이 매우 적어 주변 부품의 동작에 아무런 영향도 주지 않고, 안정되게 동작한다.The present invention is to supply the operating power directly to the PWM integrated device with the AC power supplied when the power switch is turned on. By rectifying the AC power, smoothing the AC power, and supplying it to the power terminal of the PWM integrated device, It is not necessary to use an expensive resistor, and the generated heat is very small, so that it does not affect the operation of peripheral components and operates stably.

Description

스위칭 모드 전원공급장치의 기동전원 공급회로The power supply circuit of the switching mode power supply

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.

제 1 도는 종래의 기동전원 공급회로가 구성된 스위칭 모드 전원공급장치의 구성을 보인 회로도, 제 2 도는 본 발명의 기동전원 공급회로가 구성된 스위칭 모드 전원공급장치의 구성을 보인 회로도.FIG. 1 is a circuit diagram showing a configuration of a switching mode power supply device in which a conventional activated power supply circuit is configured; FIG. 2 is a circuit diagram showing a configuration of a switching mode power supply device configured with a startup power supply circuit according to the present invention;

Claims (2)

교류전원(AC11)을 직류전원으로 변환하여 스위칭용 전원으로 출력하는 직류 전원 변환부(11)와, 발진하여 PWM 신호를 발생하는 PWM용 집적 소자(12)와, 상기 PWM용 집적 소자(12)가 출력한 PWM 신호에 따라 온 및 오프되는 스위칭 트랜지스터(Q11)와, 상기 스위칭 트랜지스터(Q11)의 온 및 오프에 따라 상기 직류 전원 변환부(11)의 출력 전원을 일차 코일(TA11)에서 이차 코일(TA12) 및 보조 코일(TA13)로 유도시키는 스위칭 트랜지스터(SWT11)와, 상기 보조 코일(TA13)로 유도된 전원을 정류하여 상기 PWM용 집적 소자(12)에 동작 전원을 공급하는 동작전원공급부(13)와, 상기 동작 전원 공급부(13)의 출력 전원 레벨을 검출하는 레벨검출부(14)와, 상기 레벨검출부(14)가 설정 레벨 이상을 검출할 경우에 상기 PWM용 집적 소자(12)의 동작 전원을 차단시키는 다이리스터(SCR11)와, 교류 전원(AC11)을 정류 및 평활하여 상기 PWM용 집적 소자(12)에 초기 동작 전원을 공급하는 초기 동작 전원 공급부(15)로 구성됨을 특징으로 하는 스위칭 모드 전원공급장치의 기동 전원 공급회로.AC power (AC 11) of the DC power converter 11 that converts the direct-current power supply to output a switching power supply for integrated for PWM oscillating to generate a PWM signal device 12 and the integrated element (12 for the PWM ) is an on and an output power of as being off the switching transistor (Q 11), the switching transistor (Q 11) oN, and the DC power converter 11 in accordance with the off according to the output PWM signal to the primary coil (TA 11 ) action on the secondary coil (TA 12) and secondary coil (TA 13), a switching transistor (SWT 11) and said auxiliary coil (TA 13), the integrated device (12 to rectify the power for the PWM guided to) that led to the in A level detection unit 14 for detecting an output power level of the operation power supply unit 13 and a control unit 14 for controlling the PWM (SCR < RTI ID = 0.0 > 11 < / RTI > And an initial operating power supply unit (15) for rectifying and smoothing the AC power source ( 11 ) and supplying initial operating power to the PWM integrated device (12). The switching power source Supply circuit. 제 1 항에 있어서, 상기 초기 동작 전원 공급부(15)는 정류부 및 소용량 콘덴서(C13)로 구성된 평활부로 이루어진 것을 특징으로 하는 스위칭 모드 전원공급장치의 기동 전원 공급회로.The starting power supply circuit according to claim 1, wherein the initial operating power supply unit (15) comprises a smoothing unit including a rectifying unit and a small capacity condenser (C 13 ). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is disclosed by the contents of the first application.
KR1019960015200A 1996-05-09 1996-05-09 The power supply circuit of the switching mode power supply KR970077925A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019960015200A KR970077925A (en) 1996-05-09 1996-05-09 The power supply circuit of the switching mode power supply

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019960015200A KR970077925A (en) 1996-05-09 1996-05-09 The power supply circuit of the switching mode power supply

Publications (1)

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KR970077925A true KR970077925A (en) 1997-12-12

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KR1019960015200A KR970077925A (en) 1996-05-09 1996-05-09 The power supply circuit of the switching mode power supply

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017075111A1 (en) * 2015-10-26 2017-05-04 Dialog Semiconductor Inc. Switching power converter with zero current at startup

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017075111A1 (en) * 2015-10-26 2017-05-04 Dialog Semiconductor Inc. Switching power converter with zero current at startup
US10180697B2 (en) 2015-10-26 2019-01-15 Dialog Semiconductor Inc. Switching power converter with zero current at startup

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