KR930007550Y1 - Power switching circuit - Google Patents
Power switching circuit Download PDFInfo
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- KR930007550Y1 KR930007550Y1 KR2019910010519U KR910010519U KR930007550Y1 KR 930007550 Y1 KR930007550 Y1 KR 930007550Y1 KR 2019910010519 U KR2019910010519 U KR 2019910010519U KR 910010519 U KR910010519 U KR 910010519U KR 930007550 Y1 KR930007550 Y1 KR 930007550Y1
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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
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0032—Control circuits allowing low power mode operation, e.g. in standby mode
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
내용 없음.No content.
Description
제 1 도는 종래의 전원 스위칭 회로.1 is a conventional power supply switching circuit.
제 2 도는 본 고안의 전원 스위칭 회로도이다.2 is a power supply switching circuit diagram of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
20 : 인버터부 40 : 정전압부20: inverter portion 40: constant voltage portion
50, 60 : 전원 스위칭부 D1~D14: 다이오드50, 60: power switch D 1 ~ D 14 : diode
C1~C6: 콘덴서 RL : 릴레이C 1 ~ C 6 : Capacitor RL: Relay
본 고안은 각종 전기제품의 전원 회로에 관한 것으로, 특히 대기모드(Stand-by Mode)나 동작상태에 따라 전원공급을 스위칭할때 소음을 줄일 수 있도록 한 전원 스위칭 회로에 관한 것이다.The present invention relates to a power supply circuit of various electrical products, and more particularly to a power switching circuit to reduce the noise when switching the power supply according to the standby mode (Stand-by Mode) or operating state.
제 1 도는 종래의 일반적인 전원 스위칭 회로도로서 TV의 전원회로를 예로들어 나타낸 것이다.1 is a conventional general power switching circuit diagram showing an example of a power supply circuit of a TV.
이에 도시된 바와같이 전원회로는, 교류전원을 정류하여 직류전원으로 변환하는 제1정류부(10)와, 상기 직류전원을 빠른속도로 스위칭하여 동작전원을 발생시키는 인버터부(20)와, 인버터부(20)에서 출력된 동작전원들을 각기 정류하는 제2정류부(30)와 정류된 동작전원들을 정전압으로 변환하는 정전압부(40)와 대기제어신호을 각기 정류하는 제2정류부(30)와, 정류된 동작전원들을 정전압으로 변환하는 정전압부(40)와, 대기제어신호에 따라 정전압부(40)로 인가되는 전원을 스위칭하는 전원스위칭부(50)로 구성되어 있었다.As shown in the drawing, the power supply circuit includes a first rectifying unit 10 for rectifying and converting AC power into a DC power source, an inverter unit 20 for switching the DC power at high speed to generate operating power, and an inverter part. A second rectifying unit 30 for rectifying the operating powers output from the 20, a constant voltage unit 40 for converting the rectified operating powers to a constant voltage, and a second rectifying unit 30 for rectifying the standby control signal, respectively, It consists of a constant voltage unit 40 for converting the operating power to a constant voltage, and a power switching unit 50 for switching the power applied to the constant voltage unit 40 according to the standby control signal.
그 작용효과를 보면, 전원코드를 통해 입력되는 교류전원은 브릿지 다이오드(D1~D4)를 거치면서 전파정류된 후 평활콘덴서(C1)에 의해 직류전원으로 바뀌어 트랜스(T)의 제1권선(L1)으로 인가된다.In view of its effect, the AC power input through the power cord is rectified through the bridge diode (D 1 ~ D 4 ) and then converted into a DC power by the smoothing capacitor (C 1 ) to the first of the transformer (T) It is applied to the winding L 1 .
이때 전원단 제어IC(21)에서 출력된 펄스에 의해 트랜지스터(TR1)가 빠르게 온, 오프되므로 제1권선(L1)에 전류가 유기됨은 물론, 제2 및 제3권선(L2)(L3)에도 전류가 유기된다.At this time, since the transistor TR 1 is quickly turned on and off by a pulse output from the power supply control IC 21, a current is induced in the first winding L 1 as well as the second and third windings L 2 ( L 3 ) also induces a current.
제3권선(L3)에 유기된 전원은 다이오드(D5)와 콘덴서(C2)에 의해 평활되어 전원단 제어IC(21)의 전원으로 공급되고, 제2권선(L2)에 유기된 전원은 다이오드(D6)와 콘덴서(C3)를 거치면서 평활되어 플라이백(Flyback)트랜스와 같이 고압을 필요로 하는 회로로 인가되며, 제2권선(L2)의 다른 단자들을 통해 출력된 전원은 다이오드(D7)(D8)와 콘덴서(C4)(C5)에 의해 각각 정류되어 릴레이(RL)로 인가된다.The power induced in the third winding (L 3 ) is smoothed by the diode (D 5 ) and the capacitor (C 2 ) and is supplied to the power supply of the power stage control IC (21), and is induced in the second winding (L 2 ). The power is smoothed through the diode (D 6 ) and the capacitor (C 3 ) and applied to a circuit requiring high voltage such as a flyback transformer, and is output through the other terminals of the second winding (L 2 ). The power is rectified by the diode D 7 (D 8 ) and the capacitor C 4 (C 5 ), respectively, and applied to the relay RL.
TV가 온되지 않은 대기모드에서는 대기제어신호가 저전위상태이므로 트랜지스터(TR2)가 오프되고, 이로인해 릴레이(RL)의 코일에 전류가 흐르지 않게되므로 릴레이 스위치(RLS1)(RLS2)들이 오프되어 정전압IC(41)(42)로의 입력전원이 차단되며, 세트내의 IC들은 동작하지 않게 된다.In the standby mode in which the TV is not turned on, since the standby control signal is in a low potential state, the transistor TR 2 is turned off, so that no current flows in the coil of the relay RL, so that the relay switches RLS 1 and RLS 2 The input power to the constant voltage ICs 41 and 42 is cut off, and the ICs in the set are not operated.
TV가 온되면, 고전위의 대기제어신호가 인가되므로 트랜지스터(TR2)가 온되고, 릴레이(RL)의 코일에 전류가 흘러 릴레이 스위치(RLS1)(RLS2)들이 접속되므로 정전압IC(41)(42)를 통해서는 12V와 5V의 동작전원이 각각 출력된다.When the TV is turned on, since the high potential standby control signal is applied, the transistor TR 2 is turned on, and a current flows through the coil of the relay RL so that the relay switches RLS 1 and RLS 2 are connected. 42) outputs 12V and 5V operating power, respectively.
그러나 상기와 같이 릴레이를 사용하게되면 제품을 온, 오프시킬때마다 팍팍거리는 소음이 심하게나는 문제점이 있었다.However, when the relay is used as described above, there was a problem that a loud noise is generated whenever the product is turned on or off.
또, 릴레이를 사용하지 않고 트랜지스터로 대체하여 구성한 회로도 있었으나, 이 회로는 전원라인에 많은 전류가 흐를 경우에는 열이 많이 발생되면서 소자가 파괴되므로 소전류가 흐를 경우에만 사용할 수 있고 대전류가 흐를경우에는 릴레이를 사용해야 하는 문제점이 있었다.In addition, some circuits were replaced by transistors without using relays. However, when a large amount of current flows in the power supply line, a large amount of heat is generated and the device is destroyed. Therefore, it can be used only when a small current flows. There was a problem with using a relay.
본 고안은 상기와 같은 종래의 문제점을 해결하기 위하여 안출한 것인바, 릴레이를 사용하지 않고 정전압IC의 접지전위를 OV 또는 부(-)전위로 가변시켜 동작전원을 공급 및 차단시킬 수 있게한 것으로, 첨부된 제 2 도를 참조하여 본 고안의 실시예를 상세히 설명하면 다음과 같다.The present invention has been devised to solve the conventional problems as described above, by changing the ground potential of the constant voltage IC to OV or negative (-) potential without using a relay to supply and cut off the operating power. With reference to the accompanying 2, an embodiment of the present invention will be described in detail.
제 2 도는 본 고안의 전원 스위칭 회로도로서 이에 도시된 바와같이, 교류전원를 정류하여 직류전원으로 변환하는 브릿지 다이오드(D1~D4), 콘덴서(C1)로 된 제1정류부(10)와, 상기 직류 전원을 빠르게 스위칭하여 동작전원을 발생시키는 트랜스(T), 트랜지스터(TR1), 전원단 제어IC(21), 다이오드(D5), 콘덴서(C2)로 인버터부(20)와, 인버터부(20)에서 출력된 동작전원들을 각기 정류하는 다이오드(D6~D8), 콘덴서(C3~C6)로 된 제2정류부(30)와, 정류된 동작전원들을 정전압으로 변환하는 정전압IC(41)(42)로된 정전압부(40)의 구성은 종래의 전원회로 구성과 동일하다.2 is a power switching circuit diagram of the present invention, as shown therein, the first rectifying unit 10 consisting of a bridge diode (D 1 ~ D 4 ), a capacitor (C 1 ) for rectifying and converting AC power to DC power, The inverter unit 20 includes a transformer (T), a transistor (TR 1 ), a power stage control IC (21), a diode (D 5 ), and a capacitor (C 2 ) for quickly switching the DC power to generate an operating power. A second rectifier 30 made of a diode (D 6 ~ D 8 ), a capacitor (C 3 ~ C 6 ) for rectifying the operating power output from the inverter unit 20, and converts the rectified operating power to a constant voltage The configuration of the constant voltage unit 40 including the constant voltage ICs 41 and 42 is the same as that of the conventional power supply circuit.
본 고안의 특징부는 대기제어신호에 따라 스위칭되면서 정전압부(40)의 접지전위를 OV 또는 부(-)전위로 가변시켜 동작전원을 공급 및 차단시키는 전원스위칭부(60)로서, 이 전원 스위칭부(60)는 트랜스(T)의 제2권선(D1)에 유기된 부(-)전원을 평활하는 다이오드(D10) 및 콘덴서(C6)와, 대기제어신호에 따라 스위칭되는 트랜지스터(TR3) 및 저항(R1)과, 상기 트랜지스터(TR3)의 에미터 전위에 따라 온, 오프되어 정전압IC(41)의 접지전위를 가변시키는 다이오드(D11)(D12)와, 상기 트랜지스터(TR3)의 에미터에 접속되어 전위차가 생기게하는 제너다이오드(ZD1)와, 상기 제너다이오드(ZD1)의 캐소드 전위에 따라 온, 오프되어 정전압IC(42)의 접지전위를 가변시키는 다이오드(D13)(D14)로 구성되어 있다.A feature of the present invention is a power switching unit 60 that supplies and cuts operating power by varying the ground potential of the constant voltage unit 40 to OV or negative (-) potential while being switched according to the standby control signal. 60 is a diode D 10 and a capacitor C 6 for smoothing the negative (-) power induced in the second winding D 1 of the transformer T, and a transistor TR switched according to the standby control signal. 3 ) and a resistor (R 1 ), a diode (D 11 ) (D 12 ) for turning on and off in accordance with the emitter potential of the transistor (TR 3 ) to vary the ground potential of the constant voltage IC 41, and the transistor (TR 3) the zener diode (ZD 1), and a diode for varying the ground potential of the zener diode (ZD 1) oN, the oFF constant-voltage IC (42) in accordance with the cathode potential of that causes a potential difference is connected to the emitter of the (D 13 ) and (D 14 ).
이와같이 구성된 본 고안은 전원 코드를 통해 입력된 교류전원이 제1정류부(10)를 거치면서 직류전원으로 변환된 후 트랜스(T)의 제1권선(L1)으로 인가되고, 전원단 제어IC(21)의 펄스신호에 따라 트랜지스터(TR1)빠르게 스위칭되면서 트랜스(T)의 제2 및 제3권선(L2)(L3)에 전원이 유기된다.According to the present invention, the AC power input through the power cord is converted into DC power while passing through the first rectifying unit 10 and then applied to the first winding L 1 of the transformer T, and a power stage control IC ( The transistor TR 1 is quickly switched according to the pulse signal of 21 to supply power to the second and third windings L 2 and L 3 of the transformer T.
제2권선(L2)에 유기된 전원은 다이오드(D6)와 콘덴서(C3)에 의해 평활되어 고압(B+)을 필요로하는 회로로 인가되고, 제2권선(L2)의 다른 단자들을 통해 출력된 전원, 예를들어 12V와 5V의 전원은 다이오드(D7)(D8)와 콘덴서(C4)(C5)에 의해 각각 평활된 후 정전압IC(41)(42)로 인가된다.The power source induced in the second winding (L 2 ) is smoothed by the diode (D 6 ) and the capacitor (C 3 ) and applied to a circuit requiring high voltage (B + ), and the other of the second winding (L 2 ) The power output through the terminals, for example, 12V and 5V power supplies, are smoothed by diodes D 7 (D 8 ) and capacitors C 4 (C 5 ), respectively, and then to constant voltage ICs 41 and 42. Is approved.
이때 대기모드에서는 대기 제어신호가 저전위 상태이므로 트랜지스터(TR3)가 오프되고, 상기 트랜지스터(TR3)의 에미터에는 트랜스(T)의 제2권선(L2)에서 유기된 -12V의 전원이 다이오드(D10)와 콘덴서(C6)에 의해 평활되어 걸리게 된다.At this time, in the standby mode, since the standby control signal is in a low potential state, the transistor TR 3 is turned off, and the emitter of the transistor TR 3 has a -12V power source induced in the second winding L 2 of the transformer T. The diode is smoothed and caught by the diode D 10 and the capacitor C 6 .
다이오드(D12)의 캐소드에 걸린 -12V의 전원에 의해 다이오드(D11)는 도통되고, 다른 다이오드(D12)는 오프되며, 다이오드(D11)가 도통됨에 따라 정전압IC(41)의 접지단자(G)에 -12V가 걸리게 되므로 상기 정전압 IC(41)의 출력전압은 OV가 된다.A diode (D 11) by the power supply of -12V stuck to the cathode of the diode (D 12) is conducting, the other diode (D 12) is off and the diode (D 11) to the ground in the constant voltage IC (41) as the conductive Since -12V is applied to the terminal G, the output voltage of the constant voltage IC 41 becomes OV.
또한, 제너다이오드(ZD1)의 애노드에 -12V가 걸리므로 제너다이오드(ZD1)를 7V용으로 사용하게 되면 캐소드에는 -5V의 전원이 걸리게되고, 상기 -5V의 전원에 의해 다이오드(D1)는 도통되고, 다이오드(D1)는 오프되므로 정전압IC(42)의 접지단자(G)에 -5V가 걸리게 되어 상기 정전압IC(42)의 출력전압이 OV가 된다.Further, when used for the zener diode is a Zener diode to -12V it takes to the anode of the (ZD 1) (ZD 1) 7V cathode has been caught, the power of -5V, -5V by the power of the diode (D 1 ) Is turned on and the diode D 1 is turned off, so that -5 V is applied to the ground terminal G of the constant voltage IC 42, and the output voltage of the constant voltage IC 42 becomes OV.
그러므로 12V 및 5V의 동작전원이 차단된 것과 같게되는 것이다.Therefore, it is as if 12V and 5V operating power were cut off.
이러한 상태에서 시스템이 온되면, 대기제어신호가 고전위상태로 되므로 트랜지스터(TR3)가 도통되고, 전류가 접지에서 트랜지스터(TR3), 저항(R1), 다이오드(D10)를 통해 다시 접지로 흐르게 되므로 트랜지스터(TR3)의 에미터 전위는 OV가 된다.When the system is turned on in this state, since the standby control signal is in a high potential state, the transistor TR 3 is turned on, and the current is returned to the ground through the transistor TR 3 , the resistor R 1 , and the diode D 10 . Since it flows to ground, the emitter potential of the transistor TR 3 becomes OV.
그러므로, 다이오드(D11)는 오프되고, 다이오드(D7)를 통해 정전압IV(41)로 입력된 전원이 접지단자(G)로 인가되므로 다이오드(D12)는 도통되며, 이로 인해 상기 접지전위가 OV가 되므로 정전압IC(41)로 부터는 12V의 동작전원이 출력된다.Therefore, the diode D 11 is turned off and the diode D 12 is conducted because the power input to the constant voltage IV 41 through the diode D 7 is applied to the ground terminal G, thereby causing the ground potential. Since OV becomes OV, a 12V operating power is output from the constant voltage IC 41.
이와마찬가지로 다이오드(D13)는 오프되고, 정전압IC(42)의 입력전원에 의해 다이오드(D14)가 도통되므로 정전압IC(42)의 접지전위가 OV가 되어 상기 정전압IC(42)로 부터는 5V의 동작전원이 출력된다.Similarly, since the diode D 13 is turned off and the diode D 14 is conducted by the input power supply of the constant voltage IC 42, the ground potential of the constant voltage IC 42 becomes OV, which is 5 V from the constant voltage IC 42. The operating power of is output.
이상에서와 같이 본 고안은 릴레이를 사용하지 않고 정전압부의 접지전위를 변화시켜 전원을 스위칭하므로 제품을 온, 오프시킬 때마다 소음이 발생되는 것을 방지할 수 있고, 전원라인에 흐르는 전류량에 관계없이 사용할 수 있는 효과가 있다.As described above, the present invention switches power by changing the ground potential of the constant voltage part without using a relay, so that noise can be prevented every time the product is turned on and off, and can be used regardless of the amount of current flowing in the power line. It can be effective.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019910010519U KR930007550Y1 (en) | 1991-01-10 | 1991-01-10 | Power switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019910010519U KR930007550Y1 (en) | 1991-01-10 | 1991-01-10 | Power switching circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR930003718U KR930003718U (en) | 1993-02-26 |
| KR930007550Y1 true KR930007550Y1 (en) | 1993-11-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019910010519U KR930007550Y1 (en) | 1991-01-10 | 1991-01-10 | Power switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR930007550Y1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040013321A (en) * | 2002-08-05 | 2004-02-14 | 삼성전자주식회사 | Multi tab built in electrical device |
-
1991
- 1991-01-10 KR KR2019910010519U patent/KR930007550Y1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040013321A (en) * | 2002-08-05 | 2004-02-14 | 삼성전자주식회사 | Multi tab built in electrical device |
Also Published As
| Publication number | Publication date |
|---|---|
| KR930003718U (en) | 1993-02-26 |
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