KR980006752A - Constant Voltage Output Overvoltage Protection Circuit in Switching Mode Power Supply (SMPS) - Google Patents

Constant Voltage Output Overvoltage Protection Circuit in Switching Mode Power Supply (SMPS) Download PDF

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Publication number
KR980006752A
KR980006752A KR1019960024408A KR19960024408A KR980006752A KR 980006752 A KR980006752 A KR 980006752A KR 1019960024408 A KR1019960024408 A KR 1019960024408A KR 19960024408 A KR19960024408 A KR 19960024408A KR 980006752 A KR980006752 A KR 980006752A
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KR
South Korea
Prior art keywords
smps
constant voltage
voltage output
circuit
power supply
Prior art date
Application number
KR1019960024408A
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Korean (ko)
Inventor
한학수
Original Assignee
배순훈
대우전자주식회사
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 배순훈, 대우전자주식회사 filed Critical 배순훈
Priority to KR1019960024408A priority Critical patent/KR980006752A/en
Publication of KR980006752A publication Critical patent/KR980006752A/en

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Abstract

본 발명은 스위칭 모드 전원 공급장치(SMPS)에서의 정전압 출력단 과전압보호회로에 관한 것으로서, SMPS의 2차측 정전압 회로에 과전압이 걸릴때 그 과전압에 기인하는 과전류에 의해 정전압 출력회로 부하회로의 반도체 부품이 파괴되는 것을 방지하기 위한 것이다.The present invention relates to a constant voltage output stage overvoltage protection circuit in a switching mode power supply (SMPS), in which when the overvoltage is applied to the secondary side constant voltage circuit of the SMPS, the semiconductor component of the constant voltage output circuit load circuit So as to prevent it from being destroyed.

이를 위하여 본 발명은 스위칭 트랜스포머의 2차측 정류부 출력단에 제너다이오드를 이용한 정전압 출력회로부를 구비한 SMPS회로에 있어서, 스위칭 트랜스포머의 2차측에 과전압이 인가되어 상기 제너 다이오너가 단락될 때 그제너 다이오드를 타고 흐르는 제너전류에 의해서 동작하여 상기 2차측 정류부의 출력단을 접지로 연결하는 과전류 바이패스 수단을 구비함을 특징으로 한다.In order to achieve the above object, the present invention provides an SMPS circuit including a constant voltage output circuit part using a zener diode at an output end of a secondary side rectifying part of a switching transformer, wherein when an overvoltage is applied to the secondary side of the switching transformer, the zener diode is short- And an overcurrent bypass means which is operated by a zener current flowing and connects an output terminal of the secondary rectifying portion to the ground.

Description

스위칭 모드 전원 공급장치(SMPS)에서의 정전압 출력단 과전압 보호회로Constant Voltage Output Overvoltage Protection Circuit in Switching Mode Power Supply (SMPS)

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

제1도는 본 발명을 설명하기 위하여 일반적인 형태의 SMPS회로를 예로 들어 보인 블럭도.FIG. 1 is a block diagram illustrating an exemplary SMPS circuit for explaining the present invention.

제2도는 종래의 SMPS 2차측 정전압 출력회로부터의 상세도.2 is a detailed view of the conventional SMPS secondary side constant voltage output circuit.

제3도는 본 발명에 따른 SMPS 2차측 정전압 출력회로부의 일실시예도.FIG. 3 shows an embodiment of the SMPS secondary side constant voltage output circuit according to the present invention.

Claims (2)

스위칭 트랜스포머(T1)의 2차측 정류부(3) 출력단에 제너 다이오드(D2)를 이용한 정전압 출력 회로부(40)를 구비한 SMPS회로에 있어서, 상기 제너 다이오드를 타고 흐르는 제너전류에 의해서 동작하여 상기 2차측 정류부의 출력단을 접지로 연결하는 과전류 바이패스 수단을 구비함을 특징으로 하는 스위칭 모드 전원 공급장치(SMPS)에서의 정전압 출력단 과전압 보호회로.An SMPS circuit including a constant voltage output circuit part (40) using a zener diode (D2) at an output end of a secondary side rectifying part (3) of a switching transformer (T1), characterized in that the SMPS circuit And an overcurrent bypass means for connecting the output terminal of the rectifying section to the ground through a ground. The overvoltage protection circuit of the constant voltage output stage in the switching mode power supply device (SMPS). 제 1항에 있어서, 상기 과전류 바이패스 수단은 상기 제너 다이오드(D2)의 캐소드 단자에 베이스 단자가 연결되며, 에미터 단자는 접지로 연결하고, 콜렉터 단자는 상기 2차측정류부(3)의 출력단에 연결한 트랜지스터(Q1)로 구성함을 특징으로 하는 스위칭 모드 전원 공급장치(SMPS)에서의 정전압 출력단 과전압 보호회로.2. The overcurrent bypass circuit according to claim 1, wherein the overcurrent bypass means is connected to a cathode terminal of the Zener diode (D2), a base terminal connected to the emitter terminal, and a collector terminal connected to the output terminal of the secondary rectifying part And a transistor (Q1) connected to the constant voltage output terminal of the switching power supply (SMPS).
KR1019960024408A 1996-06-27 1996-06-27 Constant Voltage Output Overvoltage Protection Circuit in Switching Mode Power Supply (SMPS) KR980006752A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019960024408A KR980006752A (en) 1996-06-27 1996-06-27 Constant Voltage Output Overvoltage Protection Circuit in Switching Mode Power Supply (SMPS)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019960024408A KR980006752A (en) 1996-06-27 1996-06-27 Constant Voltage Output Overvoltage Protection Circuit in Switching Mode Power Supply (SMPS)

Publications (1)

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KR980006752A true KR980006752A (en) 1998-03-30

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KR1019960024408A KR980006752A (en) 1996-06-27 1996-06-27 Constant Voltage Output Overvoltage Protection Circuit in Switching Mode Power Supply (SMPS)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8363043B2 (en) 2007-07-20 2013-01-29 Samsung Display Co., Ltd. Driving device with voltage overflow protection and display device including the driving device
KR20190086326A (en) 2018-01-12 2019-07-22 동의대학교 산학협력단 wire tennis elbow proofreading band

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8363043B2 (en) 2007-07-20 2013-01-29 Samsung Display Co., Ltd. Driving device with voltage overflow protection and display device including the driving device
KR20190086326A (en) 2018-01-12 2019-07-22 동의대학교 산학협력단 wire tennis elbow proofreading band

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