KR950016287A - Power stage protection circuit of TV receiver - Google Patents

Power stage protection circuit of TV receiver Download PDF

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Publication number
KR950016287A
KR950016287A KR1019930025258A KR930025258A KR950016287A KR 950016287 A KR950016287 A KR 950016287A KR 1019930025258 A KR1019930025258 A KR 1019930025258A KR 930025258 A KR930025258 A KR 930025258A KR 950016287 A KR950016287 A KR 950016287A
Authority
KR
South Korea
Prior art keywords
switching
circuit
switching unit
unit
overvoltage
Prior art date
Application number
KR1019930025258A
Other languages
Korean (ko)
Inventor
조춘근
Original Assignee
배순훈
대우전자 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 배순훈, 대우전자 주식회사 filed Critical 배순훈
Priority to KR1019930025258A priority Critical patent/KR950016287A/en
Publication of KR950016287A publication Critical patent/KR950016287A/en

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Abstract

본 발명은 텔레비젼 수상기의 전원단 보호회로에 의한 것으로서, 본 발명의 목적은 스위칭모드 파워 서플라이회로의 동작을 제어하는 스위칭 소자에 과전류가 공급될 경우에 텔레비젼의 내부회로의 파괴를 미연에 방지하는데 있으며, 본 발명의 특징은 전원 플러그(F)와, 정류부(2), 트랜스포머(3) 및 SMPS회로(6)등을 구비한 텔레비젼 회로에 있어서, 상기 SMPS회로부(6)에서 출력되는 제어신호에 작동되어 트랜스포머에 전원 전압이 인가될 수 있도록 단속하는 제2스위칭부(10)와. 상기 제2스위칭부(10)의 스위칭 소자(FET1)에 인가되는 과전압을 검출하는 과전압 검출부 (20), 상기 과전압 검출부(20)에서 검출된 신호에 의해 SMPS 회로에서 출력되어 스위칭부에 공급되는 전류를 차단하는 스위칭 제어부(30)로 이루어짐을 특징으로 한다.The present invention relates to a power supply protection circuit of a television receiver, and an object of the present invention is to prevent destruction of an internal circuit of a television when an overcurrent is supplied to a switching element that controls the operation of a switching mode power supply circuit. A feature of the present invention is a television circuit comprising a power plug (F), a rectifier (2), a transformer (3), an SMPS circuit (6), etc., which operates on a control signal output from the SMPS circuit portion (6). And a second switching unit 10 intermittently to apply a power supply voltage to the transformer. An overvoltage detector 20 for detecting an overvoltage applied to the switching element FET1 of the second switching unit 10 and a current output from the SMPS circuit by a signal detected by the overvoltage detector 20 and supplied to the switching unit. Characterized in that consisting of a switching control unit 30 to block the.

Description

텔레비젼 수상기의 전원단 보호회로Power stage protection circuit of TV receiver

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명에 의한 텔레비젼 수상기의 전원단 보호회로를 나타낸 도면.1 is a diagram showing a power supply protection circuit of a television receiver according to the present invention.

Claims (3)

전원 플러그(F)와, 정류부(2), 트랜스포머(3) 및 SMPS회로부(6)등을 구비한 텔레비젼 회로에 있어서, 상기 SMPS 회로(6)에서 출력되는 제어신호에 작동되어 트랜스포머에 전원 전압이 인가될 수 있도록 단속하는 제2스위힝부(10)와, 상기 제2스위칭부(10)외 스위칭 소자 (FET1)에 인가되는 과전압을 검출하는 과전압 검출부 (20), 상기 과전압 검출부(20)에서 검출된 신호에 의해 SMPS 회로에서 출력되어 WP2스위칭부에 공급되는 전류를 차단하는 스위칭 제어부(30)로 이루어짐을 특징으로 하는 텔레비젼 수상기외 전원단 보호회로.In a television circuit having a power plug (F), a rectifier (2), a transformer (3), an SMPS circuit section (6), etc., a power supply voltage is applied to the transformer by operating on a control signal output from the SMPS circuit (6). The second switching unit 10 intermittent to be applied, the overvoltage detection unit 20 for detecting an overvoltage applied to the switching element FET1 other than the second switching unit 10, and the overvoltage detection unit 20. And a switching control unit (30) which cuts off the current supplied from the SMPS circuit to the WP2 switching unit by the received signal. 제1항에 있어서, 상기 과전압 검출부(20)는 스위칭부(17)외 스위칭소자 (FETI)에서 인가된 전류가 허용치 이상인가를 검출하도록 비교하는 비교기 (COMPI)로 구성됨을 특징으로 하는 텔레비젼 수상기의 전원단 보호회로.The television receiver as claimed in claim 1, wherein the overvoltage detection unit (20) is composed of a comparator (COMPI) for comparing to detect whether the current applied from the switching element (FETI) other than the switching unit (17) is greater than the allowable value. Power stage protection circuit. 제1항에 있어서, 상기 스위칭 제어부(30)는 상기 과전압 검출부(20)의 비교기 (COMPI)에서 과전류가 검출될 경우에 제2스위칭부(10)를 오프하도록 하고, 정상적 인 전류가 검출될 경우에 상기 제2스위칭부(10)를 동작되도록 구성됨을 특징으로 하는 텔레비젼 수상기의 전원단 보호회로.The switching controller 30 turns off the second switching unit 10 when an overcurrent is detected by the comparator COMPI of the overvoltage detector 20, and when a normal current is detected. Power stage protection circuit of a television receiver, characterized in that configured to operate the second switching unit (10). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930025258A 1993-11-25 1993-11-25 Power stage protection circuit of TV receiver KR950016287A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930025258A KR950016287A (en) 1993-11-25 1993-11-25 Power stage protection circuit of TV receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930025258A KR950016287A (en) 1993-11-25 1993-11-25 Power stage protection circuit of TV receiver

Publications (1)

Publication Number Publication Date
KR950016287A true KR950016287A (en) 1995-06-17

Family

ID=66826534

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019930025258A KR950016287A (en) 1993-11-25 1993-11-25 Power stage protection circuit of TV receiver

Country Status (1)

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KR (1) KR950016287A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7692909B2 (en) 2006-09-26 2010-04-06 Samsung Electronics Co., Ltd. Power supply device having overvoltage cutoff function, image display device, and method of cutting off overvoltage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7692909B2 (en) 2006-09-26 2010-04-06 Samsung Electronics Co., Ltd. Power supply device having overvoltage cutoff function, image display device, and method of cutting off overvoltage

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