KR950010966A - Overload Detection Circuit of Power Supply - Google Patents

Overload Detection Circuit of Power Supply Download PDF

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Publication number
KR950010966A
KR950010966A KR1019930022784A KR930022784A KR950010966A KR 950010966 A KR950010966 A KR 950010966A KR 1019930022784 A KR1019930022784 A KR 1019930022784A KR 930022784 A KR930022784 A KR 930022784A KR 950010966 A KR950010966 A KR 950010966A
Authority
KR
South Korea
Prior art keywords
overload
overload detection
voltage
power supply
switching
Prior art date
Application number
KR1019930022784A
Other languages
Korean (ko)
Other versions
KR0122729B1 (en
Inventor
이동원
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.)
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Publication date
Application filed by 배순훈, 대우전자 주식회사 filed Critical 배순훈
Priority to KR1019930022784A priority Critical patent/KR0122729B1/en
Publication of KR950010966A publication Critical patent/KR950010966A/en
Application granted granted Critical
Publication of KR0122729B1 publication Critical patent/KR0122729B1/en

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/32Means for protecting converters other than automatic disconnection
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03KPULSE TECHNIQUE
    • H03K17/00Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/04Modifications for accelerating switching
    • H03K17/042Modifications for accelerating switching by feedback from the output circuit to the control circuit
    • H03K17/04213Modifications for accelerating switching by feedback from the output circuit to the control circuit in bipolar transistor switches
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03KPULSE TECHNIQUE
    • H03K17/00Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/78Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

본 발명은 전원공급장치(SMPS)의 과부하 검출회로에 관한 것으로, 전원공급장치에 있어서 일정부하 이상에서의 1차측의 스위칭 발진을 방지하기 위하여 2차측의 과부하를 검출하는 과부하 검출부와, 과부하 검출부의 과부하 검출시 턴오프되는 포토 커플러와, 과부화 검출부의 출력에 따라 1차측의 스위칭부를 제어하는 과부하 제어부를 구성하여 일정부하 이상에서 발생하는 1차측의 스위칭 발진을 억제함으로써 과부하시 1,2차측의 회로소자를 보호할 수 있도록 함과 동시에 전원공급장치의 신뢰성을 향상시킨다.The present invention relates to an overload detection circuit of a power supply device (SMPS), the overload detection unit for detecting the overload of the secondary side in order to prevent the switching oscillation of the primary side at a predetermined load or more in the power supply device, and the overload detection unit A photo coupler that is turned off during overload detection and an overload control unit for controlling the switching unit on the primary side in accordance with the output of the overload detection unit to suppress switching oscillation on the primary side caused by a certain load or more, thereby overloading circuits on the primary and secondary sides during overload. It improves the reliability of the power supply while protecting the device.

Description

전원공급장치의 과부하 검출회로Overload Detection Circuit of Power Supply

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

제2도는 본 발명의 블럭도,2 is a block diagram of the present invention,

제3도는 본 발명의 상세회로도.3 is a detailed circuit diagram of the present invention.

Claims (3)

외부로 부터 입력되는 교류전압을 정류하는 다이오드 모듈(1)과, 상기 다이오드 모듈(1)에 연결되어 노이즈 성분을 제거하는 스너버(2)와, 상기 다이오드 모듈(1) 및 스너버(2)에 연결되어 상기 다이오드 모듈(1)을 통한 전압에 의해 스위칭되어 2차측(P2),(P4)에 전압을 유기시키는 스위칭부(3)와, 상기 다이오드 모듈 (1) 및 스위칭부(3)에 연결된 트랜스(T1),(T2)를 통하여 2차측(P2),(P4)에 유기되는 전압을 정류하는 제1, 제2 정류부(4),(5)와, 상기 2차측(P2),(P4)의 전압을 안정화시키기 위해 2차측(P2)의 이상 전압을 검출하는 오차전압 검출부(6)와, 상기 오차전압 검출부(6)의 출력에 따라 턴온되는 포토 커플러(7)와, 상기 오차전압 검출부(6)의 출력에 따라 상기 스위칭부(1)를 제어하는 스위칭 제어부(8)를 구비하는 전원공급장치에 있어서, 상기 제2정류부(5)에 접속되며 트랜스(T1),(T2)의 2차측 (P2),(P4)의 과전압을 검출하는 과부하 검출부(10)와, 상기 과부하 검출부(10)에 연결되며 상기 과부하 검출부(10)의 과부하 검출시 턴오프되는 포토 커플러(20)와, 상기 포토 커플러(20)에 연결되며 상기 포토 커플러(20)의 턴오프시 턴온되어 상기 스위칭부(3)의 발진을 억제하는 과부하 제어부(30)를 더 구비함을 특징으로 하는 전원공급장치의 과부하 검출회로.Diode module (1) for rectifying the AC voltage input from the outside, a snubber (2) connected to the diode module (1) to remove noise components, the diode module (1) and snubber (2) Connected to the switching unit 3 for switching the voltage through the diode module 1 to induce a voltage on the secondary sides P2 and P4, and to the diode module 1 and the switching unit 3. First and second rectifiers 4 and 5 for rectifying the voltage induced on the secondary side P2 and P4 through the connected transformers T1 and T2, and the secondary side P2 and ( An error voltage detector 6 which detects an abnormal voltage of the secondary side P2 to stabilize the voltage of P4, a photo coupler 7 turned on in response to the output of the error voltage detector 6, and the error voltage In the power supply having a switching control section 8 for controlling the switching section 1 in accordance with the output of the detection section 6, it is connected to the second rectifying section 5 Overload detection unit 10 for detecting the overvoltage of the secondary (P2), (P4) of the transformer (T1), (T2), and is connected to the overload detection unit 10, the turn when detecting the overload of the overload detection unit 10 And an overload control unit 30 connected to the photo coupler 20 to be turned off and turned on when the photo coupler 20 is turned off to suppress oscillation of the switching unit 3. Overload detection circuit of a power supply characterized in that. 제1항에 있어서, 상기 과부하 검출부(10)는 상기 제2정류부(5)에 연결된 전압분배용 저항(R1O),(Rll)과, 상기 제1정류부(4)에 연결된 역전류 방지용 다이오드(D8)와, 상기 다이오드(D8)에 연결된 콘덴서(C7)와, 상기 저항(R1O), (Rll)에 비반전 입력단(+)이 접속되고 상기 다이오드(D8) 및 콘덴서(C7)에 반전 입력단(-)이 접속되어 2차측(P2),(P4)의 과부하시 로우상태의 출력을 유지하는 비교기(COMP1)와, 상기 비교기(COMP1)에 접속되며 비교기(COMP1)의 출력이 로우 상태일 경우 턴오프되는 스위칭용 트랜지스터(TR3)로 구성됨을 특징으로 하는 전원공급장치의 과부하 검출회로.2. The diode of claim 1, wherein the overload detection unit 10 includes a voltage distribution resistor R10 and Rll connected to the second rectifier 5, and a reverse current prevention diode D8 connected to the first rectifier 4. ), A capacitor C7 connected to the diode D8, a non-inverting input terminal (+) connected to the resistors R10 and Rll, and an inverting input terminal (-) to the diode D8 and the capacitor C7. ) Is connected to maintain the output of the low state when the secondary side (P2), (P4) is overloaded, and is turned off when the output of the comparator (COMP1) is connected to the comparator (COMP1) Overload detection circuit of the power supply, characterized in that consisting of a switching transistor (TR3). 제1항에 있어서, 상기 과부하 제어부(30)는 상기 포토 커플러(20)에 베이스측이 연결되고 상기 스위칭부(3)에 콜렉터측이 연결된 스위칭용 트랜지스터(TR4)로 구성됨을 특징으로 하는 전원공급장치의 과부하 검출회로.The power supply of claim 1, wherein the overload controller 30 includes a switching transistor TR4 having a base side connected to the photo coupler 20 and a collector side connected to the switching unit 3. Overload detection circuit of the device. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930022784A 1993-10-29 1993-10-29 Overload detection circuit of power supply KR0122729B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930022784A KR0122729B1 (en) 1993-10-29 1993-10-29 Overload detection circuit of power supply

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930022784A KR0122729B1 (en) 1993-10-29 1993-10-29 Overload detection circuit of power supply

Publications (2)

Publication Number Publication Date
KR950010966A true KR950010966A (en) 1995-05-15
KR0122729B1 KR0122729B1 (en) 1997-11-22

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KR1019930022784A KR0122729B1 (en) 1993-10-29 1993-10-29 Overload detection circuit of power supply

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020059135A (en) * 2001-01-02 2002-07-12 송재인 Sensing circuit for badness of power supply

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020059135A (en) * 2001-01-02 2002-07-12 송재인 Sensing circuit for badness of power supply

Also Published As

Publication number Publication date
KR0122729B1 (en) 1997-11-22

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