KR970063858A - Logic circuit protection device - Google Patents

Logic circuit protection device Download PDF

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Publication number
KR970063858A
KR970063858A KR1019960003307A KR19960003307A KR970063858A KR 970063858 A KR970063858 A KR 970063858A KR 1019960003307 A KR1019960003307 A KR 1019960003307A KR 19960003307 A KR19960003307 A KR 19960003307A KR 970063858 A KR970063858 A KR 970063858A
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KR
South Korea
Prior art keywords
voltage
power supply
supply means
logic
output
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KR1019960003307A
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Korean (ko)
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KR0159719B1 (en
Inventor
김호진
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김광호
삼성전자 주식회사
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Priority to KR1019960003307A priority Critical patent/KR0159719B1/en
Publication of KR970063858A publication Critical patent/KR970063858A/en
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Publication of KR0159719B1 publication Critical patent/KR0159719B1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/045—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere
    • H02H9/046—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere responsive to excess voltage appearing at terminals of integrated circuits
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
    • G01R19/16576—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing DC or AC voltage with one threshold
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0045—Converters combining the concepts of switch-mode regulation and linear regulation, e.g. linear pre-regulator to switching converter, linear and switching converter in parallel, same converter or same transistor operating either in linear or switching mode

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Protection Of Static Devices (AREA)
  • Control Of Voltage And Current In General (AREA)

Abstract

1. 청구범위에 기재된 발명이 속하는 기술분야1. Technical field to which the invention described in the claims belongs

본 발명은 로직회로를 구비하는 장치에 관한 것으로, 특히 로직회로를 과전압으로부터 보호하기 위한 장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device having a logic circuit, and more particularly to a device for protecting a logic circuit from overvoltage.

2. 발명이 해결하고자하는 기술적 과제2. Technical Problems to be Solved by the Invention

로직전압을 공급하는 정전압 공급수단이 파손되는 경우 과전압 유입을 차단하여 로직회로를 보호할 수 있는 로직회로 보호장치를 제공함에 있다.And a logic circuit protection device capable of protecting a logic circuit by blocking an overvoltage input when a constant voltage supplying means for supplying a logic voltage is broken.

3. 발명의 해결방법의 요지3. The point of the solution of the invention

교류상용전압을 정류하여 직류전압으로 출력하는 전원공급수단과, 상기 전원공급수단으로부터 출력되는 직류전압을 상기 장치의 구동을 위한 규정레벨의 구동전압으로 전환하여 출력하는 제1정전압 전원공급수단과, 상기 제1정전압 전원공급수단으로부터 출력되는 규정레벨의 구동전원을 로직전압으로 전환하여 상기 로직회로로 출력하는 제2정전압 전원공급수단과, 상기 제2정전압 전원공급수단으로부터 규정레벨 이상의 과전압이 출력되는 경우 이를 상기 전원공급수단으로부터 출력되는 규정레벨의 직류전압과 비교함으로서 일정 논리레벨의 과전압검출신호를 발생하여 출력하는 과전압 검출수단과, 상기 과전압 검출수단과 제1정전압 전원공급수단사이에 접속되어 상기 과전압 검출수단으로부터 출력되는 과전압검출신호의 논리레벨에 따라 스위칭 온/오프 동작함으로서 상기 제1정전압 전원공급수단으로부터 출력되는 구동전압을 규정레벨이하의 직류전압으로 강하시키는 전원제어수단으로구성됨을 특징으로 한다.A first constant voltage power supply means for converting a DC voltage output from the power supply means into a drive voltage of a predetermined level for driving and outputting the DC voltage outputted from the power supply means, A second constant voltage power supply means for converting a driving power of a predetermined level outputted from the first constant voltage power supply means into a logic voltage and outputting the logic voltage to the logic circuit; Voltage detecting means for detecting an overvoltage detection signal having a predetermined logic level by comparing the detected voltage with a direct-current voltage of a predetermined level outputted from the power supply means, and a second overvoltage detecting means connected between the overvoltage detecting means and the first constant- Voltage detection signal output from the over-voltage detection means And power supply control means for lowering the drive voltage output from the first constant voltage power supply means to a direct current voltage of a predetermined level or lower by switching on / off operation.

4. 발명의 중요한 용도4. Important Uses of the Invention

로직회로를 구비하는 장치에 있어서 과전압으로부터 로직회로 보호에 이용될 수 있다.And can be used for protecting logic circuits from overvoltages in devices equipped with logic circuits.

Description

로직회로 보호장치Logic circuit protection device

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

제1도는 로직회로를 구비하는 장치에 있어서 상기 로직회로에 정전압을 공급하기 위한 전원장치의 일예를 보인 블럭도.1 is a block diagram showing an example of a power supply device for supplying a constant voltage to the logic circuit in an apparatus having a logic circuit;

제2도는 본 발명에 따른 로직회로 보호장치의 블럭구성도.FIG. 2 is a block diagram of a logic circuit protection device according to the present invention. FIG.

제3도는 제2도의 상세회로도.3 is a detailed circuit diagram of FIG. 2;

Claims (5)

로직회로를 구비하는 장치의 로직회로 보호장치에 있어서, 교류상용전압을 정류하여 직류전압으로 출력하는 전원공급수단과, 상기 전원공급수단으로부터 출력되는 직류전압을 상기 장치의 구동을 위한 규정레벨의 구동전압으로 전환하여 출력하는 제1정전압 전원공급수단과, 상기 제1정전압 전원공급수단으로부터 출력되는 규정레벨의 구동전원을 로직전압으로 전환하여 상기 로직회로로 출력하는 제2정전압 전원공급수단과, 상기 2정전압 전원공급수단으로부터 규정레벨 이상의 과전압이 출력되는 경우 이를 상기 전원공급수단으로부터 출력되는 규정레벨의 직류전압과 비교함으로서 일정 논리레벨의 과전압검출신호를 발생하여 출력하는 과전압 검출수단과, 상기 과전압 검출수단과 제1정전압 전원공급수단사이에 접속되어 상기 과전압 검출수단으로부터 출력되는 과전압검출신호의 논리레벨에 따라 스위칭 온/오프 동작함으로서 상기 제1정전압 전원공급수단으로부터 출력되는 구동전압을 규정레벨이하의 직류전압으로 강하시키는 전원제어수단으로 구성됨을 특징으로 하는 로직회로 보호장치.A logic circuit protection device for an apparatus having a logic circuit, comprising: power supply means for rectifying an AC commercial voltage and outputting it as a DC voltage; A second constant voltage power supply means for converting the driving power of a prescribed level outputted from the first constant voltage power supply means into a logic voltage and outputting the logic voltage to the logic circuit; Overvoltage detection means for generating and outputting an overvoltage detection signal having a predetermined logic level by comparing the overvoltage at a prescribed level or more output from the two constant voltage power supply means with a direct voltage at a predetermined level output from the power supply means; And a first constant-voltage power supply means, And a power supply control means for lowering the drive voltage output from the first constant voltage power supply means to a direct current voltage of a predetermined level or less by switching on / off operation in accordance with the logic level of the overvoltage detection signal output from the logic circuit Protection device. 제1항에 있어서, 상기 과전압 검출수단은; 상기 제2정전압 전원공급수단으로부터 출력되는 로직전압을 분압하기 위해 상기 제2정전압 전원공급수단의 출력단과 접지사이에 직렬접속된 제1및 제2저항과, 상기 전원 공급수단으로부터 출력되는 직류전압을 분압하기 위해 상기 전원공급수단의 출력단과 접지사이에 직렬접속된 제3 및 제4저항과, 상기 제1 및 제2저항의 접속점에 비반전입력단자가 연결되고 상기 제3및 제4저항의 접속점에 반전입력단자가 연결됨으로서 입력전압 비교에 따른 일정 논리레벨의 과전압검출신호를 발생하여 상기 제어수단으로 출력하는 비교기로 구성됨을 특징으로 하는 로직회로 보호장치.2. The overvoltage detection apparatus according to claim 1, wherein the overvoltage detection means comprises: First and second resistors connected in series between the output terminal of the second constant-voltage power supply means and the ground for dividing the logic voltage output from the second constant-voltage power supply means, and a DC voltage output from the power supply means Third and fourth resistors connected in series between the output terminal of the power supply means and the ground to divide the voltage of the first and second resistors, and a third resistor connected to the connection point of the first and second resistors, And a comparator for generating an overvoltage detection signal having a predetermined logic level according to an input voltage comparison and outputting the overvoltage detection signal to the control means. 제2항에 있어서, 상기 제1 내지 제4저항은 상기 제2정전압 전원공급수단으로부터 출력되는 로직전압이 규정레벨 이상의 과전압으로 출력되는 경우 이에 응답하여 상기 비교기가 일정 논리레벨의 과전압검출신호를 발생하도록 설정됨을 특징으로 하는 로직회로 보호장치.3. The semiconductor integrated circuit according to claim 2, wherein the first to fourth resistors generate an overvoltage detection signal having a predetermined logic level in response to a logic voltage output from the second constant voltage power supply means being output at an overvoltage of a predetermined level or higher The logic circuit protection device comprising: 제3항에 있어서, 상기 비교기의 출력단과 접속된 제5저항과, 상기 제5저항과 접지에 각각 베이스와 콜렉터가 접속되어 상기 과전압검출신호의 논리레벨에 따라 "턴-온" 및 "턴-오프"동작하는 트랜지스터와, 상기 제1정전압 전원공급수단의 출력전압을 안정화시키기 위한 역방향 제너다이오드의 캐소드와 상기 트랜지스터의 에미터사이에 접속된 제6저항으로 구성됨을 특징으로 하는 로직회로 보호장치.4. The semiconductor integrated circuit according to claim 3, further comprising: a fifth resistor connected to the output terminal of the comparator; and a base and a collector respectively connected to the fifth resistor and the ground to turn-on and turn-off according to the logic level of the overvoltage- And a sixth resistor connected between the cathode of the backward zener diode for stabilizing the output voltage of the first constant voltage power supply means and the emitter of the transistor. 제4항에 있어서, 상기 제6저항 양단에 인가되는 전압은 로직전압 미만의 전압이 인가되도록 상기 제6저항을 설정함을 특징으로 하는 로직회로 보호장치.5. The logic circuit protection device of claim 4, wherein the sixth resistor sets the voltage applied across the sixth resistor to be less than the logic voltage. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is disclosed by the contents of the first application.
KR1019960003307A 1996-02-12 1996-02-12 Logic circuit protection apparatus KR0159719B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019960003307A KR0159719B1 (en) 1996-02-12 1996-02-12 Logic circuit protection apparatus

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Application Number Priority Date Filing Date Title
KR1019960003307A KR0159719B1 (en) 1996-02-12 1996-02-12 Logic circuit protection apparatus

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KR970063858A true KR970063858A (en) 1997-09-12
KR0159719B1 KR0159719B1 (en) 1999-01-15

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KR100799496B1 (en) * 2002-03-25 2008-01-31 주식회사 만도 Protection device of vehicle sensor

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