KR890006528Y1 - Circuits of switching mode powersupply - Google Patents
Circuits of switching mode powersupply Download PDFInfo
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- KR890006528Y1 KR890006528Y1 KR2019860019438U KR860019438U KR890006528Y1 KR 890006528 Y1 KR890006528 Y1 KR 890006528Y1 KR 2019860019438 U KR2019860019438 U KR 2019860019438U KR 860019438 U KR860019438 U KR 860019438U KR 890006528 Y1 KR890006528 Y1 KR 890006528Y1
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- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
-
- 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
- H02M1/36—Means for starting or stopping converters
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- Dc-Dc Converters (AREA)
Abstract
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Description
제1도는 본 고안의 구체회로도이다.1 is a specific circuit diagram of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 전원부 2 : 전원스위치부1: power unit 2: power switch unit
3 : 스위칭트랜스포머 4 : 스위칭제어부3: switching transformer 4: switching control unit
5 : 정류부 6 : 비교부5: rectifying part 6: comparing part
7 : 광절연부 8 : 부하7: optical insulation section 8: load
BG : 브릿지정류회로 FF : T형 플립플롭BG: Bridge rectifier circuit FF: T flip-flop
SW : 터치스위치 LED : 발광다이오드SW: Touch Switch LED: LED
RY : 릴레이 VR1: 가변저항RY: Relay VR 1 : Variable resistor
IC1: 프리러닝 발진기 집적회로IC 1 : free running oscillator integrated circuit
본 고안은 텔레비젼의 플라이백 트랜스포머등에 안정된 전원을 공급하는 스위칭모우드 전원공급회로(SMPS : Swtching Mode Power Supply)에 관한 것으로, 특히 원터치방식으로 스위칭 트랜스포머의 동작을 온, 오프시키며, 스위칭 트랜스포머의 2차측에 유기된 전압으로 비교기와 옵토커플러를 통해 1차측의 발진주파수를 제어하여 정확한 출력전압을 공급하도록 된 스위칭 모우드 전원공급회로에 관한 것이다.The present invention relates to a switching mode power supply circuit (SMPS: Swtching Mode Power Supply) for supplying stable power to a flyback transformer of a television. The present invention relates to a switching mode power supply circuit configured to supply an accurate output voltage by controlling the oscillation frequency of the primary side through a comparator and an optocoupler with a voltage induced in the circuit.
종래 스위칭모우드 전원공급회로를 사용하고 있는 텔레비젼등에 있어서는 전원의 온, 오프를 제어하도록 마이크로 프로세서를 사용함에 따라 원가상승의 요인이 되어왔을뿐만 아니라 스위칭 트랜스포머의 2차측에 정확한 전압을 일정하게 유지시켜 주기에는 트랜스포머의 권선기술상 어려움이 뒤따르고 있고, 이러한 스위칭 트랜스포머를 사용하여 일정한 전압을 출력시키기에는 1차측의 전원공급 또는 출력전압의 궤환을 위한 회로구성이 매우 복잡하게 된다고 하는 결점이 있었다.In the case of a TV using a conventional switching mode power supply circuit, the use of a microprocessor to control the power on and off has not only caused a cost increase but also maintains a constant voltage on the secondary side of the switching transformer. There is a drawback in the winding technology of the transformer, and there is a drawback that the circuit configuration for the power supply of the primary side or the feedback of the output voltage is very complicated to output a constant voltage using the switching transformer.
이에 본 고안은 상기한 결점을 개선하기 위하여 안출된 것으로서, T형 플립플롭을 사용하여 원터치 방식으로 전원을 온, 오프 시킬수 있도록 하고, 2차측에 출력되는 전압으로 비교기와 옵토커플러를 통해 1차측 궤환 발진부 제어전압을 제어하므로써 정확한 전압을 일정하게 공급하도록 된 스위칭모우드 전원공급회로를 제공하고자 함에 그 목적이 있다.Therefore, the present invention was devised to improve the above-mentioned drawbacks. The T-type flip-flop allows the power to be turned on and off in a one-touch manner, and the voltage is output to the secondary side. It is an object of the present invention to provide a switching mode power supply circuit which is configured to supply a constant voltage by controlling the oscillator control voltage.
이하 본 고안의 구성 및 작용효과를 예시된 도면에 의거하여 상세히 설명하면 다음과 같다.Hereinafter, the configuration and operation effects of the present invention will be described in detail with reference to the illustrated drawings.
본 고안은 브릿지 정류회로(BG)와 콘덴서(C1) 및 다이오우드(D1)로 구성되어 교류전원(AC)을 전파 및 반파정류하는 전원부(1)와, T형 플립플롭(FF)과 터치스위치(SW), 트랜지스터(TR1), 발광다이오드(LED) 및 릴레이(RY)로 구성되어 상기 터치 스위치(SW)의 동작에 따라 릴레이(RY)가 동작되므로써 상기 전원부(1)의 출력전원을 온, 오프 시키는 전원스위치부(2), 스위칭 전원을 출력시키는 스위칭 트랜스포머(3), 상기 스위칭 트랜스포머(3)에다 프리러닝 발진기 집적회로(IC1)에 의한 스위칭제어용 발진주파수를 공급하는 스위칭제어부(4), 다이오드(D2)와 저항(R1) 및 콘덴서(C2)로 구성되어 상기 스위칭 트랜스포머(3)의 출력 전압을 정류하는 정류부(5), OP 앰프(OP1)와 저항(R2) 및 가변저항(VR1)으로 구성되어 상기 정류부(5)의 출력전압과 가변저항(VR1)에 의한 기준전압을 비교하는 비교부(6) 및 옵토커플러(OPTO)와 저항(R3-R5) 및 트랜지스터(TR2)로 구성되어 상기 비교부(6)의 출력신호에 따라 상기 스위칭제어부(4)의 궤환전압을 제어하므로써 발진주파수를 제어하는 광절연부(7)로 구성 되어있다.The present invention consists of a bridge rectifier circuit (BG), a capacitor (C 1 ) and a diode (D 1 ), a power supply unit (1) for propagating and half-wave rectifying AC power (AC), T-type flip-flop (FF) and touch The switch SW, the transistor TR1, the light emitting diode LED, and the relay RY are configured to operate the relay RY according to the operation of the touch switch SW, thereby turning on the output power of the power supply 1. A switching control unit 4 for supplying an oscillation frequency for switching control by the free-running oscillator integrated circuit IC 1 to the switching transformer 3. ), A rectifier 5 for rectifying the output voltage of the switching transformer 3, an op amp OP 1 and a resistor R 2 , comprising a diode D 2 , a resistor R 1 , and a capacitor C 2 . ) And a variable resistor (VR 1 ) and the output voltage and the variable resistor (VR 1 ) of the rectifier (5) Comparing unit (6) and optocoupler (OPTO), resistors (R 3 -R 5 ) and transistor (TR 2 ) for comparing the quasi-voltage and the switching control unit (4) in accordance with the output signal of the comparing unit (6) It consists of an optical insulator (7) for controlling the oscillation frequency by controlling the feedback voltage.
미설명부호8은 플라이백트랜스포머(FBT)나 수평발진회로(HOSC)등 스위칭 트랜스포머(3)로부터 전원을 공급받는 부하, T1-T3는 스위칭 트랜스포머(3)의 1, 2, 3 차측 권선을 나타낸다.Reference numeral 8 denotes a load supplied from a switching transformer 3 such as a flyback transformer (FBT) or a horizontal oscillation circuit (HOSC), and T 1 -T 3 are windings of the primary, secondary and tertiary sides of the switching transformer 3. Indicates.
제1도는 상기한 구조로 되어있는 본 고안의 구체적인 회로도를 나타내는 것으로, 전원부(1)는 교류전원(AC)을 브릿지정류회로(BG)를 통해서는 전파정류하고, 다이오드(D1)를 통해서는 반파정류 한다.1 shows a specific circuit diagram of the present invention having the above-described structure, wherein the power supply unit 1 rectifies the AC power AC through the bridge rectifying circuit BG and through the diode D 1 . Half-wave rectification.
전파전류된 직류전원은 전원 스위치부(2)의 릴레이(RY)를 통해 스위칭트랜스포머(3)의 1차측 권선에 공급되어 스위칭 트랜스포머(3)를 구동시키고, 반파정류된 전원은 저항(R6)을 통해 일정전압으로 전압 강하된후 전압스위치부 (2)와 스위칭제어부(4) 및 광전연부(7)에 동작전원으로서 공급된다.The propagated DC power is supplied to the primary winding of the switching transformer 3 through the relay RY of the power switch unit 2 to drive the switching transformer 3, and the half-wave rectified power is a resistor R 6 . After the voltage is lowered to a constant voltage through, it is supplied to the voltage switch unit 2, the switching control unit 4 and the photoelectric unit 7 as an operating power source.
전원스위치부(2)는 터치스위치(SW)에 의해 토글되는 T형 플립플롭(FF)으로 릴레이(RY)를 동작 시키므로써 릴레이(RY)의 스위치 접점이 온 오프되어 러치스위치(SW)의 원터치방식으로 전원부(1)의 전파 정류전압이 스위칭 트랜스포머(3)에 공급되거나 차단되게 된다.The power switch unit 2 is a T-type flip-flop FF that is toggled by the touch switch SW to operate the relay RY so that the switch contact of the relay RY is turned on and off so that the touch switch SW is one-touch. In this manner, the full-wave rectified voltage of the power supply unit 1 is supplied to the switching transformer 3 or cut off.
즉 T형 플립플롭(FF)의 출력단(Q)이 로우레벨로 되어 있는 초기상태에서는 트랜지스터(TR1)가 턴오프되게 되므로 발광다이오드(LED)는 점등되지 않고 릴레이(RY)도 동작되지 않는다.That is, since the transistor TR 1 is turned off in the initial state in which the output terminal Q of the T flip-flop FF is at the low level, the light emitting diode LED is not turned on and the relay RY is not operated.
따라서 전원부(1)로부터의 전원이 스위칭 트랜스포머(3)에 공급되는 것을 차단하게 되므로써 스위칭 트랜스포머(3)는 구동되지 않게되고, 그에따라 부하(8)에는 전원이 유기되지 않게되어 수평발진이나 수평출력신호는 출력되지 않고 플라이백 트랜스포머(FBT)도 동작되지 않게 된다.Therefore, since the power from the power supply unit 1 is blocked from being supplied to the switching transformer 3, the switching transformer 3 is not driven, and thus, the power is not induced to the load 8, so that horizontal oscillation or horizontal output is performed. The signal is not output and the flyback transformer (FBT) is not activated.
이후 터치스위치(SW)를 온시키면 T형 플립플롭(FF)의 클록단(CK)에 펄스신호가 인가되어 T형 플립플롭(FF)은 토글되므로써 출력단(Q)에 하이 레벨신호를 출력시키고, 그에따라 트랜시스터(TR1)가 턴온되어 발광다이오드(LED)가 점등됨과 더불어 릴레이(RY)가 동작되게 된다.Then, when the touch switch SW is turned on, a pulse signal is applied to the clock terminal CK of the T-type flip-flop FF, and the T-type flip-flop FF is toggled to output a high level signal to the output terminal Q. Accordingly, the transistor TR 1 is turned on so that the light emitting diode LED is turned on and the relay RY is operated.
발광다이오드(LED)의 점등은 현재 전원이 공급되고 있는 상태를 외부에 표시하는 것이되고, 릴레이(RY)의 동작은 스위치접점을 온시켜 스위칭 트랜스포머(3)에 구동전원을 공급하게 한다.The lighting of the light emitting diode (LED) is to externally indicate the current power supply state, and the operation of the relay RY turns on the switch contact to supply driving power to the switching transformer 3.
그로부터 스위칭 트랜스퍼머(3)의 출력측 부하(8)에 전원을 공급하게 되는 것이다.From this, power is supplied to the output side load 8 of the switching transformer 3.
전술한 상태에서 텃치스위치(SW)를 다시 온시키면 T형 플립플롭(FF)은 토글하여 출력단(Q)에 로우레벨신호를 출력하게 되므로 전술한 초기상태와 같이 스위칭트랜스포머(3)의 구동을 중지시킨다.When the quench switch SW is turned on again in the above state, the T-type flip-flop FF toggles to output a low level signal to the output terminal Q. Therefore, the driving of the switching transformer 3 is stopped as in the initial state. Let's do it.
이와같이 텃치스위치(SW)와 T형 플립플롭(FF)에 의해 원터치방식으로 전원을 제어할 수 있게되는 것이다.In this way, the power switch can be controlled by the touch switch SW and the T-type flip-flop FF.
한편, 스위칭 트랜스포머(3)에 구동전원이 공급된 상태에서는 스위칭 트랜스포머(3)의 1차측 권선(T1)에 유기된 전원이 2차측 권선(T2)을 통해 부하(8)로 출력되기도 하지만 3차측 권선(T3)을 통해 궤환되는 전압에 의해 프리러닝 발진기 집적회로(IC1)에서 스위칭 제어용 발진주파수를 출력시켜 코일(L1)과 스위칭 트랜지스터(TR3)를 통해 1차측 권선의 전원을 스위칭 시킨다.On the other hand, while driving power is supplied to the switching transformer 3, the power induced in the primary winding T 1 of the switching transformer 3 may be output to the load 8 through the secondary winding T 2 . Power of the primary winding through the coil L 1 and the switching transistor TR 3 by outputting the oscillation frequency for switching control from the free running oscillator integrated circuit IC 1 by the voltage fed back through the tertiary winding T 3 . Switch.
이와같은 동작을 하는 스위칭 제어부(4)는 출력전압을 일정하게 유지시켜 주도록 트리러닝 발진기 집적회로(IC1)의 출력발진주파수를 궤환전압에 의해 조정시키고 있지만 그에따른 출력전압은 임의로 원하는 출력전압으로 조정하기가 매우 까다롭다.The switching control unit 4 which operates in this way adjusts the output oscillation frequency of the trirunning oscillator integrated circuit IC 1 by the feedback voltage so as to keep the output voltage constant, but the output voltage accordingly is arbitrarily set to the desired output voltage. Very difficult to adjust
이를 위하여 본 고안에서는 출력측인 스위칭 트랜스포머(3)의 2차측 권선(T2)에다 다이오드(D2)와 저항(R1) 및 콘덴서(C2)로 구성되는 정류부(5)를 연결하고, 그 정류부(5)의 출력전압을 비교부(6)에서 비교하여 광절연부(7)를 통해 스위칭제어부(4)에 궤환시키므로써 정확하고 일정한 전압을 출력시키도록 하고있다.To this end, in the present invention, a rectifier 5 composed of a diode D 2 , a resistor R 1 , and a capacitor C 2 is connected to the secondary winding T 2 of the switching transformer 3 on the output side, and The output voltage of the rectifier 5 is compared by the comparator 6 and fed back to the switching controller 4 through the optical isolator 7 so as to output an accurate and constant voltage.
즉 정류부(5)에서 출력되는 전압은 부하(8)에 공급되는 전압에 비례하므로 이 전압을 저항(R2)과 가변저항(VR1)에 의해 설정되는 기준전압과 비교한다.That is, since the voltage output from the rectifier 5 is proportional to the voltage supplied to the load 8, the voltage is compared with the reference voltage set by the resistor R 2 and the variable resistor VR 1 .
여기서 기준전압은 가변저항(VR1)에 의해 원하는 전압으로 조정되는데, 비교된 결과의 전압은 옵토커플러(OPTO)에 의해 광절연되는 광절연부(7)를 통해 스위칭제어부(4)에 궤환되므로써 스위칭트랜스포머(3)의 2차측 권선(T2)에 유기되는 출력전압을 항상 일정하고 정확하게 출력시키게 되는 것이다.Here, the reference voltage is adjusted to the desired voltage by the variable resistor VR 1 , and the resultant voltage is fed back to the switching controller 4 through the optical isolator 7 optically insulated by the optocoupler OPTO. The output voltage induced in the secondary winding T 2 of the switching transformer 3 is always to be constantly and accurately output.
상기한 바와같이 본 고안은 간단한 회로구성으로써 원터치 방식으로 전원을 온 오프할 수 있을뿐만 아니라 비교기와 옵토커플러를 사용하여 정확하고 일정한 전압을 출력시킬 수 있는 장점이 있다.As described above, the present invention has the advantage of being able to turn on and off the power by a one-touch method with a simple circuit configuration as well as outputting a precise and constant voltage using a comparator and an optocoupler.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019860019438U KR890006528Y1 (en) | 1986-12-05 | 1986-12-05 | Circuits of switching mode powersupply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019860019438U KR890006528Y1 (en) | 1986-12-05 | 1986-12-05 | Circuits of switching mode powersupply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR880013925U KR880013925U (en) | 1988-08-31 |
| KR890006528Y1 true KR890006528Y1 (en) | 1989-09-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019860019438U KR890006528Y1 (en) | 1986-12-05 | 1986-12-05 | Circuits of switching mode powersupply |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR890006528Y1 (en) |
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1986
- 1986-12-05 KR KR2019860019438U patent/KR890006528Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR880013925U (en) | 1988-08-31 |
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