KR980006746A

KR980006746A - DC-DC converter input stage circuit

Info

Publication number: KR980006746A
Application number: KR1019960024895A
Authority: KR
Inventors: 노일
Original assignee: 이형도; 삼성전기주식회사
Priority date: 1996-06-28
Filing date: 1996-06-28
Publication date: 1998-03-30

Abstract

본 발명은 직류-직류 변환기의 입력단 회로에 관해 게시한다. 본 발명은 직류 전압이 인가되는 저항과, 상기 저항에 입력단이 연결된 제 1 스위칭수단과, 상기 제 1 스위칭 수단의 출력단에 입력단이 연결되고 출력단은 상기 제 1 스위칭 수단의 제어단에 연결된 출력 궤환부와, 상기 출력궤환부의 출력단에 연결되어 제어단에 신호가 입력되면 상기 출력 궤환부의 출력단은 접지시켜서 상기 제 1 스위칭 수단을 오프시키는 제 2 스위칭 수단 및 상기 제 2 스위칭 수단의 제어단에 연결되어 과전류나 고온이 검출되면 일정 전압을 갖는 신호를 출력하여 상기 제 2 스위칭 수단을 도통시키는 고온 검출부를 구비함으로써 과전류나 고온 발생시 입력 전압이 차단되어 후단의 회로에는 과전류나 고온의 영향을 전혀 받지않게 된다.The present invention relates to an input stage circuit of a DC-DC converter. The first switching means includes an input terminal connected to the output terminal of the first switching means and an output terminal connected to the output terminal of the output switching means connected to the control terminal of the first switching means. A second switching means connected to an output terminal of the output feedback unit for turning off the first switching means by grounding the output terminal of the output feedback unit when a signal is input to the control terminal, And a high-temperature detection unit for outputting a signal having a predetermined voltage when the high temperature is detected to turn on the second switching means. Thus, the input voltage is cut off when an overcurrent or a high temperature is generated, so that no influence of the overcurrent or the high temperature is applied to the circuit at the subsequent stage.

Description

DC-DC converter input stage circuit

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

제 1 도는 본 발명에 따른 직류-직류 변환기의 입력단 회로도이다.FIG. 1 is an input stage circuit diagram of a DC-DC converter according to the present invention.

Claims

A resistor to which a DC voltage is applied; First switching means having an input connected to the resistor; An output feedback unit having an input terminal connected to the output terminal of the first switching unit and an output terminal connected to the control terminal of the first switching unit; A second switching unit connected to an output terminal of the output feedback unit and configured to turn off the first switching unit by grounding the output terminal of the output feedback unit when a signal is input to the control unit, And a high-temperature detector for outputting a signal having a predetermined voltage to conduct the second switching means when the DC-DC converter is detected.

The DC-DC converter input stage circuit according to claim 1, wherein the first switching means is a PMOS transistor.

2. The DC-DC converter input stage circuit according to claim 1, wherein the second switching means is an NPN transistor.

[2] The apparatus of claim 1, wherein the output feedback unit comprises: a PMOS transistor driver connected to an output terminal of the first switching unit; and a collector and a base connected to an output terminal of the PMOS transistor driver, And a capacitor connected between the collector of the NPN transistor and the emitter of the NPN transistor.

The DC-DC converter input stage circuit according to claim 1, further comprising another capacitor connected in parallel to the resistor.