KR900007136Y1 - Controlling circuit for switching mode power supply - Google Patents

Controlling circuit for switching mode power supply Download PDF

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Publication number
KR900007136Y1
KR900007136Y1 KR2019870022283U KR870022283U KR900007136Y1 KR 900007136 Y1 KR900007136 Y1 KR 900007136Y1 KR 2019870022283 U KR2019870022283 U KR 2019870022283U KR 870022283 U KR870022283 U KR 870022283U KR 900007136 Y1 KR900007136 Y1 KR 900007136Y1
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South Korea
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transistor
control
power supply
output
switching mode
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KR2019870022283U
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Korean (ko)
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KR890014971U (en
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김동주
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주식회사 금성사
최근선
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    • 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
    • H02M1/08Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • 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
    • H02M7/00Conversion of ac power input into dc power output; Conversion of dc power input into ac power output

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

Abstract

내용 없음.No content.

Description

스위칭모드 전원공급장치의 출력제어회로Output Control Circuit of Switching Mode Power Supply

첨부된 도면은 본 고안의 출력제어 회로도이다.The accompanying drawings are an output control circuit diagram of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1,4 : 정류기 2 : 제어용집적소자1,4 rectifier 2 control integrated device

3 : 스위칭트랜지스터부 TR1, TR2 : 트랜지스터3: switching transistor section TR1, TR2: transistor

SCR : 다이리스터 R1-R9 : 저항SCR: Dylist R1-R9: Resistance

CS : 제어신호입력단자 DT : 제어단자CS: Control signal input terminal DT: Control terminal

Vref : 기준전압단자Vref: Reference voltage terminal

본 고안은 스위칭 트랜지스터가 온되는 시간을 제어하여 부하에 일정전원을 공급하는 스위칭모드 전원공급장치에 있어서, 스위칭모드 전원공급장치의 동작을 외부에서 필요할때 간단하게 차단시키거나 재출력할 수 있게 한 스위칭모드 전원공급장치의 출력제어회로에 관한 것이다.The present invention provides a switching mode power supply for supplying a constant power to a load by controlling the time that the switching transistor is turned on, so that the operation of the switching mode power supply can be easily cut off or re-output when necessary from the outside. An output control circuit of a switched mode power supply device.

종래에는 시스템에 인가되는 교류전원을 차단시켜야 스위칭모드 전원공급장치의 동작이 정지되게 구성하였으므로 그 스위칭모드 전원장치의 출력을 외부에서 용이하게 제어할 수 없는 문제점이 있었다.Conventionally, since the operation of the switching mode power supply is stopped only when the AC power applied to the system is shut off, there is a problem in that the output of the switching mode power supply cannot be easily controlled from the outside.

본 고안은 이와같은 종래의 결함을 감안하여, 외부의 제어신호를 이용하여 스위칭모드 전원공급장치의 동작을 정지시키게 안출한 것으로, 이를 첨부된 도면에 의하여 상세히 설명하면 다음과 같다.The present invention is conceived to stop the operation of the switching mode power supply using an external control signal in view of such a conventional defect, described in detail by the accompanying drawings as follows.

첨부된 도면은 본 고안의 출력제어회로도로서, 이에 도시한 바와같이 교류전원(AC)을 정류한 정류기(1)의 출력전원을 제어용집적소자(2)의 제어에 따라 스위칭트랜지스터부(3)가 출력하고, 그 스위칭트랜지스터(3)의 출력전원을 정류기(4)로 정류하여 부하엘 공급하게 한 스위칭모드 전원공급장치에 있어서, 제어신호입력단자()를 저항(R1)을 통해 트랜지스터(TR1)의 베이스에 접속함과 아울러 그 접속점을 저항(R2)을 통한 후 상기 정류기(4)의 출력단자와 함께 트랜지스터(TR1)의 에미터에 접속하고, 트랜지스터(TR1)의 콜렉터는 접지 저항(R3) 및 저항(R4)을 통해 저항(R5, R6), 콘덴서(C3), 다이리스터(SCR)의 게이트에 접속하며, 다이리스터(SCR)의 애노드에는 상기 정류기(1)의 출력단자를 저항( 7)을 통해 접속하는 한편, 상기 제어용집적소자(2)의 제어단자(DT)를 트랜지스터(TR2)의 콜렉터에 접속하고, 집적소자(2)의 기준전압단자(Vref)는 트랜지스터(TR2)의 에미터에 접속함과 아울러 저항(R8)을 통해 트랜지스터(TR2)의 베이스에 접속하여 그 접속점을 저항(R9) 및 다이오드(D3)를 통해 상기 다이리스터(SCR)의 애노드 및 저항(R7)의 접속점에 접속한 것으로, 상기에서 제어용집적소자(2)는 그의 제어단자(DT)에 고전위가 인가될때 출력단자(OUT)로 저전위를 출력하여 스위칭트랜지스터부(3)가 오프되게 하고, 도면의 설명중 미설명 부호 T1는 트랜스이고, FU는 퓨즈이다.The accompanying drawings are an output control circuit diagram of the present invention, in which the switching transistor unit 3 controls the output power of the rectifier 1 rectifying AC power AC according to the control of the control integrated device 2. A switching mode power supply which outputs and rectifies the output power of the switching transistor 3 to the rectifier 4 to supply a load. ) Is connected to the base of the transistor TR1 through the resistor R1 and the connection point is connected to the emitter of the transistor TR1 together with the output terminal of the rectifier 4 after the connection point through the resistor R2, The collector of the transistor TR1 is connected to the gates of the resistors R5 and R6, the capacitor C3, and the thyristor SCR through the ground resistor R3 and the resistor R4, and the anode of the thyristor SCR is connected to the anode. The output terminal of the rectifier 1 is connected via a resistor 7, while the control terminal DT of the control integrated element 2 is connected to the collector of the transistor TR2, and the reference of the integrated element 2 is applied. The voltage terminal Vref is connected to the emitter of the transistor TR2, and is connected to the base of the transistor TR2 through the resistor R8, and the connection point thereof is connected to the die thyristor through the resistor R9 and the diode D3. The control integrated element 2 is connected to the connection point of the anode of the SCR and the resistor R7. Here outputs a low potential to the output terminal (OUT) has a high potential is applied when the (DT) switching transistor section 3, the reference numeral T1 of the presented and the description of the drawing-off is a trans, FU is a fuse.

이와같이 구성된 본 고안의 작용효과를 상세히 설명하면 다음과 같다.Referring to the effects of the present invention configured in this way in detail as follows.

교류전원(AC)이 인가되면, 그 교류전원(AC)은 트랜스(T1)를 통해 강압되고, 다이오드(D1)를 통해 정류되며, 퓨즈(FU)를 통하고, 콘덴서(C1)에 의해 평활되어 출력 즉, 정류기(1)는 일정전원을 출력하여 스위칭트랜지스터(3)에 입력됨과 아울러 제어용집적소자(2)에 동작전원을 공급하게 된다.When AC power AC is applied, the AC power AC is stepped down through transformer T1, rectified through diode D1, through fuse FU and smoothed by capacitor C1. That is, the rectifier 1 outputs a constant power and is input to the switching transistor 3, and supplies the operating power to the control integrated device 2.

이와같이 제어용집적소자(2)에 동작전원이 인가되면, 제어용집적소자(2)는 출력단자(OUT)로 펄스신호를 출력하여 이 펄스신호가 스위칭트랜지스터부(3)에 인가되므로 스위칭 트랜지스터(3)는 일정주기로 온 및 오프를 반복하면서 상기 정류기(1)의 출력전원을 출력하게 되고, 그 스위칭 트랜지스터부(3)의 출력전원을 정류기(4)를 통해 전류되어 부하에 동작전원을 공급함과 아울러 저항(R5,R4,R3)에 의해 분할되어 다이어스터(SCR)의 게이트에 인가되며, 여기서, 다이리스터(SCR)의 게이트에 그의 드레시홀드전압이하가 인가되게 저항(R3-R5)의 값을 설정하면, 다이리스터(SCR)가 오프되고, 트랜지스터(TR2)의 베이스전류가 흐르지 못하여 그가 오프되므로 제어용집적소자(2)의 제어단자(DT)에는 저전위가 인가되어 제어용집적소자(2)는 정상동작되고, 부하에는 계속 동작전원을 공급하게 된다.When the operating power is applied to the control integrated element 2 in this way, the control integrated element 2 outputs a pulse signal to the output terminal OUT, and the pulse signal is applied to the switching transistor section 3 so that the switching transistor 3 Is outputting the output power of the rectifier 1 while repeating the on and off at a constant period, the output power of the switching transistor unit 3 is current through the rectifier 4 to supply the operating power to the load and the resistance Divided by (R5, R4, R3) and applied to the gate of the diaster SCR, where the values of the resistors R3-R5 are set such that the threshold voltage or less thereof is applied to the gate of the diester SCR. When the thyristor SCR is turned off and the base current of the transistor TR2 does not flow, it is turned off, so that a low potential is applied to the control terminal DT of the control integrated device 2 so that the control integrated device 2 is normal. Is activated and continues to the load The operations will supply sources.

이와같은 상태에서 부하에 공급되는 전원을 차단하기 위하여 제어신호입력단자()로 저전위가 입력되게 하면, 트랜지스터(TR1)가 온되고, 정류기(4)의 출력전원이 트랜지스터(TR1) 및 저항(R4)을 통해 다이리스터(SCR)의 게이트에 인가되어 그가 도통되므로 트랜지스터(TR2)의 베이스전류가 저항(R9) 및 다이오드(D3)를 통해 다이리스터(SCR)를 흐르면서 트랜지스터(TR2)가 온되고, 이에따라 제어용집적소자(2)의 기준전압단자(Vref)의 기준전압이 트랜지스터(TR2)를 통해 제어용집적소자(2)의 제어단자(DT)에 인가되므로 제어용집적소자(2)는 출력단자(OUT)로 계속 저전위를 출력하여 스위칭트랜지스터(3)가 계속 오프상태로 되고, 부하에는 동작전원을 공급하지 못하게 된다.In this state, the control signal input terminal ( When the low potential is input to the transistor TR1, the transistor TR1 is turned on, and the output power of the rectifier 4 is applied to the gate of the thyristor SCR through the transistor TR1 and the resistor R4 so that the transistor is turned on. The transistor TR2 is turned on as the base current of TR2 flows through the diester SCR through the resistor R9 and the diode D3, and accordingly, the reference voltage of the reference voltage terminal Vref of the control integrated device 2 is turned on. Since the transistor TR2 is applied to the control terminal DT of the control integrated element 2, the control integrated element 2 continuously outputs a low potential to the output terminal OUT, so that the switching transistor 3 remains in an off state. It is impossible to supply the operating power to the load.

이상에서 상세히 설명한 바와같이 본 고안은 5V,12V,-12V,24V,36V등의 여러가지 출력전압중에서 필요로하는 전압을 본 회로에 채용하여 그 채용된 출력전압을 효과적으로 제어할 수 있는 이점이 있다.As described in detail above, the present invention has an advantage of effectively controlling the adopted output voltage by employing a voltage required among various output voltages such as 5V, 12V, -12V, 24V, and 36V in the circuit.

Claims (1)

정류기(1)의 출력전원을 제어용집적소자(2)의 제어에 따라 스위칭트랜지스터부(3)가 출력하고, 정류기(4)로 정류하여 부하에 동작전원을 공급하게 한 스위칭모드 전원공급장치에 있어서, 제어신호입력단자()를 트랜지스터(TR1)의 베이스측에 접속하고, 트랜지스터(TR1)의 콜렉터는 다이리스터(SCR)의 게이트에 접속하여 다이리스터(SCR)의 애노드에 상기 정류기(1)의 출력단자측 및 트랜지스터(TR2)의 베이스측을 접속하며, 트랜지스터(TR2)의 에미터 및 콜렉터는 상기 제어용집적소자(2)의 기준전압단자(Vref) 및 제어단자(DT)에 접속하여 구성함을 특징으로 하는 스위칭모드 전원공급장치의 출력제어회로.In the switching mode power supply device in which the switching transistor unit 3 outputs the output power of the rectifier 1 under the control of the control integrated element 2 and rectifies the rectifier 4 to supply operating power to the load. , Control signal input terminal ( ) Is connected to the base side of the transistor TR1, and the collector of the transistor TR1 is connected to the gate of the thyristor SCR, and the output terminal side of the rectifier 1 and the transistor ( A switching mode characterized in that the base side of TR2 is connected, and the emitter and collector of transistor TR2 are connected to the reference voltage terminal Vref and control terminal DT of the control integrated element 2. Output control circuit of the power supply.
KR2019870022283U 1987-12-17 1987-12-17 Controlling circuit for switching mode power supply KR900007136Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019870022283U KR900007136Y1 (en) 1987-12-17 1987-12-17 Controlling circuit for switching mode power supply

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019870022283U KR900007136Y1 (en) 1987-12-17 1987-12-17 Controlling circuit for switching mode power supply

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KR890014971U KR890014971U (en) 1989-08-11
KR900007136Y1 true KR900007136Y1 (en) 1990-08-06

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KR2019870022283U KR900007136Y1 (en) 1987-12-17 1987-12-17 Controlling circuit for switching mode power supply

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100708193B1 (en) * 2005-11-28 2007-04-16 삼성전자주식회사 Camera with lens protecting cap

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100708193B1 (en) * 2005-11-28 2007-04-16 삼성전자주식회사 Camera with lens protecting cap

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