KR950030503A - Power short circuit protection circuit of low noise converter - Google Patents

Power short circuit protection circuit of low noise converter Download PDF

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Publication number
KR950030503A
KR950030503A KR1019940008585A KR19940008585A KR950030503A KR 950030503 A KR950030503 A KR 950030503A KR 1019940008585 A KR1019940008585 A KR 1019940008585A KR 19940008585 A KR19940008585 A KR 19940008585A KR 950030503 A KR950030503 A KR 950030503A
Authority
KR
South Korea
Prior art keywords
power supply
low noise
short
noise converter
voltage
Prior art date
Application number
KR1019940008585A
Other languages
Korean (ko)
Other versions
KR970001851B1 (en
Inventor
박의권
Original Assignee
김주용
현대전자산업 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 김주용, 현대전자산업 주식회사 filed Critical 김주용
Priority to KR1019940008585A priority Critical patent/KR970001851B1/en
Publication of KR950030503A publication Critical patent/KR950030503A/en
Application granted granted Critical
Publication of KR970001851B1 publication Critical patent/KR970001851B1/en

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated

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  • Dc-Dc Converters (AREA)
  • Power Conversion In General (AREA)

Abstract

본 발명은 저잡음 변환기의 전원단락 보호회로에 관한 것으로써, 특히 전원공급회로부(1)의 출력단이 단락되었음을 검출하는 단락감지부(2)와; 전원공급회로부의 비교기(U1)에서 일정전압 이상의 출력전압이 발생되면 전원공급회로부(1)내 다아링톤 접속 트랜지스터(Q1)의 구동을 차단시켜 저잡음 변환기로의 전원전압공급을 차단시켜 주는 스위칭부(3)를 개재하여 전원공급회로의 출력이 단락되었을시 그의 입력전압을 아예 차단시켜주므로서 전력공급용 트랜지스터의 발열로 인한 손상을 방지할 수 있어 제품의 신뢰도를 향상시킬 수 있을 뿐만 아니라, 제품의 생산원가를 대폭 절감시킬 수 있는 것이다.The present invention relates to a power supply short circuit protection circuit of a low noise converter, and in particular, a short circuit detection section (2) for detecting that the output terminal of the power supply circuit section (1) is short-circuited; When the output voltage of a predetermined voltage or more occurs in the comparator U1 of the power supply circuit unit, the switching unit cuts off the driving of the Darlington connection transistor Q1 in the power supply circuit unit 1 to cut off the power voltage supply to the low noise converter ( When the output of the power supply circuit is short-circuited through 3), the input voltage is cut off altogether, thereby preventing damage caused by the heat generation of the power supply transistor, thereby improving the reliability of the product. The cost of production can be greatly reduced.

Description

저잡음 변환기의 전원단락 보호회로Power short circuit protection circuit of low noise converter

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

제1도는 폴리 스위치를 이용한 종래 저잡음 변환기에서의 전원단락 보호회로도, 제2도는 능동소자를 이용한 종래 저잡음 변환기에서의 전원단락 보호회로도, 제3도는 본 발명 전원단락 보호회로도.1 is a power short circuit protection circuit diagram of a conventional low noise converter using a poly switch, FIG. 2 is a power circuit short circuit protection circuit diagram of a conventional low noise converter using an active element, and FIG. 3 is a power circuit short circuit protection circuit of the present invention.

Claims (1)

저잡음 변환기(LNB)에 전원전압을 공급시켜 주는 전원공급회로부(1)를 구성함에 있어서, 상기 전원공급회로부(1)의 출력단이 단락되었을시 소정의 출력신호를 상기 전원공급회로부(1)내의 비교기(U1)에 인가시켜주는 단락감지부(2)와; 출력부의 단락으로 인해 상기 비교기(U1)에서 일정전압 이상의 출력전압이 발생되면 전원공급회로부(1)내 다아링톤 접속 트랜지스터(Q1)의 구동을 차단시켜 저잡음 변환기로의 전원전압 공급을 차단시켜 주는 스위칭부(3)를 개재하여서 된 것을 특징으로 하는 저잡음 변환기의 전원단락 보호회로.In constructing a power supply circuit unit 1 for supplying a power voltage to the low noise converter LNB, a comparator in the power supply circuit unit 1 outputs a predetermined output signal when the output terminal of the power supply circuit unit 1 is short-circuited. A short circuit detecting unit 2 applied to U1; Switching to cut off the supply of power voltage to the low noise converter by shutting off the driving of the Darlington connection transistor Q1 in the power supply circuit unit 1 when an output voltage of a predetermined voltage or more is generated in the comparator U1 due to a short circuit in the output unit. A power supply short circuit protection circuit for a low noise converter, characterized in that it is provided via a section (3). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940008585A 1994-04-22 1994-04-22 Lnb KR970001851B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940008585A KR970001851B1 (en) 1994-04-22 1994-04-22 Lnb

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940008585A KR970001851B1 (en) 1994-04-22 1994-04-22 Lnb

Publications (2)

Publication Number Publication Date
KR950030503A true KR950030503A (en) 1995-11-24
KR970001851B1 KR970001851B1 (en) 1997-02-17

Family

ID=19381559

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019940008585A KR970001851B1 (en) 1994-04-22 1994-04-22 Lnb

Country Status (1)

Country Link
KR (1) KR970001851B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101032171B1 (en) * 2009-12-21 2011-05-02 삼성전기주식회사 Satellite receiver with over-current protection function

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101032171B1 (en) * 2009-12-21 2011-05-02 삼성전기주식회사 Satellite receiver with over-current protection function

Also Published As

Publication number Publication date
KR970001851B1 (en) 1997-02-17

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