KR890000287Y1 - Circuit for preventing heat - Google Patents
Circuit for preventing heat Download PDFInfo
- Publication number
- KR890000287Y1 KR890000287Y1 KR2019850013926U KR850013926U KR890000287Y1 KR 890000287 Y1 KR890000287 Y1 KR 890000287Y1 KR 2019850013926 U KR2019850013926 U KR 2019850013926U KR 850013926 U KR850013926 U KR 850013926U KR 890000287 Y1 KR890000287 Y1 KR 890000287Y1
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- circuit
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- integrated circuit
- power supply
- transistor
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Classifications
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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
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
-
- 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
- H02M3/33507—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 with automatic control of the output voltage or current, e.g. flyback converters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
Abstract
내용 없음.No content.
Description
제1도는 종래의 전원회로도.1 is a conventional power supply circuit diagram.
제2도는 본 고안의 발열방지회로가 구성된 전원회로도.2 is a power circuit diagram configured with a heat generation prevention circuit of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 선간잡음제거회로 2 : 정류회로1: Line noise canceling circuit 2: Rectifier circuit
3 : 정전압회로 4 : 전원제어용집적회로3: constant voltage circuit 4: integrated circuit for power control
5 : 첨두치제거회로 6 : 평활회로5: peak removal circuit 6: smoothing circuit
7 : 오차검출 및 증폭회로 TR1, TR2: 트랜지스터7: Error detection and amplification circuit TR 1 , TR 2 : Transistor
D1-D4: 다이오드 R1-R13: 저항D 1 -D 4 : Diodes R 1 -R 13 : Resistance
T1: 구동트랜스T 1 : drive transformer
본 고안은 각종 전기 및 전자기기등에 일정 동작전원을 공급하는 전원회로에 있어서, 스위칭소자인 트랜지스터의 온, 오프를 제어하여 일정교류전압이 출력되게 하는 전원제어용 집적회로(integrated circuit)가 발열되지 않게한 전원제어용 집적회로의 발열방지회로에 관한 것이다.The present invention is a power supply circuit for supplying a constant operating power to various electrical and electronic devices, such that the integrated circuit for power control to control the on and off of the switching element transistor to output a constant alternating voltage so as not to generate heat An anti-heating circuit of an integrated circuit for power control.
일반적으로 전원제어용 집적회로를 사용하는 종래의 전원회로는 제1도에 도시한 바와 같이 교류전원(AC)이 인가되는 선간잡음제거회로(1)를 전원스위치(SW1)(SW2)를 통해 정류회로(2)의 입력단자에 접속하여 정류회로(2)의 출력단자를 정전압회로(3)의 입력단자 및 구동트랜스(T1)의 일차측(T11)일측단자에 공통접속하고, 정전압회로(3)의 출력단자는 다이오드(D2)를 통한 구동트랜스(T1)의 제2이차측(T13)일측단자와 함께 전원제어용 집적회로(4)의 전원단자(VC)에 접속함과 동시에 그 접속점을 저항(R3)을 통해 집적회로(4)의 구동단자(DR)에 접속하여, 집적회로(4)의 출력단자(Q)는 트랜지스터(TR2)의 베이스에 접속하여 그의 콜렉터를 전원트랜스(T1)의 일차측(T11)타측단자 및 첨두치제거회로(5)에 접속하였다.In general, a conventional power supply circuit using an integrated power control circuit uses a power supply switch SW 1 (SW 2 ) through a line noise elimination circuit 1 to which an AC power source AC is applied, as shown in FIG. 1. Connected to the input terminal of the rectifier circuit 2, the output terminal of the rectifier circuit 2 is commonly connected to the input terminal of the constant voltage circuit 3 and one terminal of the primary side (T 11 ) of the drive transformer (T 1 ), The output terminal of the circuit 3 is connected to the power terminal VC of the power control integrated circuit 4 together with one terminal of the second secondary side T 13 of the driving transformer T 1 through the diode D 2 . At the same time, the connection point is connected to the driving terminal DR of the integrated circuit 4 via the resistor R 3 , so that the output terminal Q of the integrated circuit 4 is connected to the base of the transistor TR 2 and its collector. Is connected to the other terminal of the primary side T 11 of the power supply transformer T 1 and the peak removal circuit 5.
이와 같이 구성된 종래의 전원회로는 교류전원(AC)이 인가되고, 전원스위치(SW1)(SW2)를 단락시키면, 교류전원(AC)이 선간잡음제거회로(1) 및 전원스위치(SW1)(SW2)를 통해 정류회로(2)에 입력되어 정류된 후 구동트랜스(T1)의 일차측(T11)에 인가됨과 동시에 정전압회로(3)에 입력되어 정전압으로 되고, 그 정전압은 집적회로(4)의 전원단자(VC)에 입력되어 집적회로(4)에 동작전원을 인가함과 동시에 저항(R3)을 통해 구동단자(DR)에 입력되어 출력단자(Q)에 제어전압이 출력되게 하며, 그 제어전압에 따라 트랜지스터(TR2)가 온·오프를 반복하면서 구동트랜스(T1)의 일차측(T11)에 인가된 정류회로(2)의 출력전압이 그의 이차측(T12)(T13)으로 유도되며, 이차측(T12)으로 유도된 전압은 다이오드(D3) 및 평활회로(6)를 통해 부하에 인가됨과 동시에 오차검출 및 증폭회로(7)를 통해 집적회로(4)로 궤환되어 부하에 안정된 직류전압이 인가되게 하고 있다.In the conventional power supply circuit configured as described above, when the AC power source AC is applied, and the power switch SW 1 (SW 2 ) is short-circuited, the AC power source AC disconnects the line noise canceling circuit 1 and the power switch SW 1. After being inputted and rectified by the rectifier circuit 2 through (SW 2 ), it is applied to the primary side T 11 of the driving transformer T 1 and simultaneously input to the constant voltage circuit 3 to become a constant voltage. It is input to the power supply terminal VC of the integrated circuit 4 to apply operating power to the integrated circuit 4 and at the same time is input to the drive terminal DR through the resistor (R 3 ) to the control terminal to the output terminal (Q) The output voltage of the rectifier circuit 2 applied to the primary side T 11 of the driving transformer T 1 while the transistor TR 2 is repeatedly turned on and off according to the control voltage thereof. Induced by (T 12 ) (T 13 ), the voltage induced to the secondary side (T 12 ) is applied to the load through the diode (D 3 ) and smoothing circuit (6) and at the same time error detection And a feedback circuit 7 is fed back to the integrated circuit 4 so that a stable DC voltage is applied to the load.
그러나, 이와 같이 동작되는 종래의 전원회로는 집적회로(4)의 출력단자(Q)에서 출력되어 트랜지스터(TR2)의 온·오프를 제어하는 제어전압이 저항(R3)을 통해 집적회로(4)의 구동단자(DR)에 입력되어야 하므로 저항(R3)의 값은 작아야 되고, 집적회로(4)의 구동단자(DR)에는 많은 전류가 흐르게 되어 집적회로(4)내에서 많은 열이 발생되는 결함이 있었다.However, the conventional power supply circuit operated as described above has a control voltage output from the output terminal Q of the integrated circuit 4 to control the on / off of the transistor TR 2 through the resistor R 3 . Since the value of the resistor R 3 is to be input to the driving terminal DR of 4), the value of the resistor R 3 must be small, and a lot of current flows in the driving terminal DR of the integrated circuit 4 so that a lot of heat is generated in the integrated circuit 4. There was a defect that occurred.
본 고안은 이와 같은 종래의 결함을 감안하여, 트랜지스터(TR2)의 베이스에 외부에서 일정전압이 인가되게 하여 집적회로(4)의 구동단자(DR)에 적은 전류가 흐르게 함으로써 집적회로(4)에서의 발열을 방지하게 안출한 것으로 이를 첨부된 제2도를 참조하여 상세히 설명하면 다음과 같다.In view of such a conventional defect, the present invention allows a constant voltage to be applied to the base of the transistor TR 2 from the outside so that a small current flows in the driving terminal DR of the integrated circuit 4. It will be described in detail with reference to Figure 2 attached to prevent the heat generated in the following.
제2도는 본 고안의 발열방지회로가 구성된 전원회로도로서 이에 도시한 바와 같이 정전압회로(3)의 출력단자를 다이오드(D2)를 통한 구동트랜스(T1)의 제2이차측(T13)과 함께 전원제어용 집적회로(4)의 전원단자(VC)에 접속함과 동시에 그 접속점을 저항(R3)을 통해 집적회로(4)의 구동단자(DR)에 접속하고, 집적회로(4)의 출력단자(Q)는 트랜지스터(TR2)의 베이스에 접속하여 그의 콜렉터를 전원트랜스(T1)의 일차측(T11) 타측단자에 접속한 전원회로에 있어서, 전원트랜스(T1)의 제3이차측(T14)을 저항(R13) 및 다이오드(D4)를 통해 트랜지스터(TR2)의 베이스에 접속하여 구성한 것으로 제1도 및 제2도의 도면중 미설명부호 BD1는 브리지 다이오드이고, ZD1는 정전압 다이오드이며, C1-C5는 콘덴서이며, VR1는 가변저항이다.FIG. 2 is a power circuit diagram in which a heat generation prevention circuit of the present invention is constructed, and as shown therein, the second terminal side T 13 of the driving transformer T 1 through the diode D 2 through the output terminal of the constant voltage circuit 3. Is connected to the power supply terminal VC of the power supply control integrated circuit 4, and the connection point thereof is connected to the driving terminal DR of the integrated circuit 4 through the resistor R 3 , and the integrated circuit 4 of the output terminal (Q) is the primary side according to a power supply circuit connected to (T 11) the other terminal, a power transformer (T 1) in his collector connected to the base of the transistor (TR 2) power transformer (T 1) The third secondary side T 14 is connected to the base of the transistor TR 2 through a resistor R 13 and a diode D 4. In the drawings of FIGS. 1 and 2, reference numeral BD 1 denotes a bridge. ZD 1 is a constant voltage diode, C 1 -C 5 is a capacitor, and VR 1 is a variable resistor.
이와 같이 구성된 본 고안의 작용효과를 상세히 설명하면 다음과 같다.Referring to the effect of the present invention configured in this way in detail as follows.
전원스위치(SW1)(SW2)를 단락시키고, 교류전원(AC)이 인가되면 종래와 마찬가지로 그 교류전원(AC)는 선간잡음제거회로(1) 및 전원스위치(SW1)(SW2)를 통해 정류회로(2)에 입력되어 정류되고, 그 정류된 전압은 구동트랜스(T1)의 일차측(T11)에 인가됨과 동시에 정전압회로(3)를 통해 집적회로(4)의 전원단자(VC) 및 구동단자(DR)에 입력되므로 집적회로(4)의 출력단자(Q)에는 제어전압이 출력되고, 그 제어전압은 트랜지스터(TR2)의 베이스에 인가되어 구동트랜스(T1)의 일차측(T11)에 인가된 전압이 그의 이차측(T12)(T13)으로 유도된다.When the power switch SW 1 (SW 2 ) is short-circuited and the AC power source AC is applied, the AC power source AC removes the line noise canceling circuit 1 and the power switch SW 1 SW 2 as in the prior art. The rectified circuit 2 is inputted to and rectified through the rectifying circuit 2, and the rectified voltage is applied to the primary side T 11 of the driving transformer T 1 and at the same time, the power supply terminal of the integrated circuit 4 is provided through the constant voltage circuit 3. Since it is input to the VC and the driving terminal DR, a control voltage is output to the output terminal Q of the integrated circuit 4, and the control voltage is applied to the base of the transistor TR 2 to drive the driving transformer T 1 . The voltage applied to the primary side T 11 of is induced to its secondary side T 12 (T 13 ).
이와 같이 동작됨에 있어서, 본 고안은 트랜지스터(TR2)가 온·오프됨에 따라 구동트랜스(T1)의 일차측(T11)전압이 제3이차측(T14)으로 유도되고, 그 유도된 전압은 저항(R13) 및 다이오드(D4)를 통해 트랜지스터(TR2)의 베이스에 일정구동 전류를 제공하게 된다.In the operation as described above, according to the present invention, as the transistor TR 2 is turned on and off, the primary side T 11 voltage of the driving transformer T 1 is induced to the third secondary side T 14 , and the induced The voltage provides a constant driving current to the base of the transistor TR 2 through the resistor R 13 and the diode D 4 .
따라서, 집적회로(4)의 출력단자(Q)로 출력되는 제어전압의 전류가 작아도 트랜지스터(TR2)를 충분히 제어할 수 있게 되고, 이에 따라 저항(R3)의 값을 크게 하여 집적회로(4)의 구동단자(DR)에 적은 전류가 흐르게 할 수 있으므로 집적회로(4)에서의 발열이 거의 없게 된다.Therefore, even if the current of the control voltage output to the output terminal Q of the integrated circuit 4 is small, the transistor TR 2 can be sufficiently controlled, thereby increasing the value of the resistor R 3 to increase the integrated circuit ( Since a small current can flow in the driving terminal DR of 4), there is little heat generation in the integrated circuit 4.
이상에서 설명한 바와 같이 본 고안은 트랜지스터(TR2)의 베이스에 외부에서 일정전류가 흐르게 하고, 집적회로(4)의 구동단자(DR)에는 적은 전류가 흐르게 하여 집적회로(4)에서의 발열을 방지하므로 집적회로(4)의 사용수명을 연장시킴은 물론, 집적회로(4)의 발열을 방열시키기 위한 방열장치의 크기가 줄어들어 제품의 크기를 소형화할 수 있는 이점도 있다.As described above, in the present invention, a constant current flows to the base of the transistor TR 2 from the outside, and a small current flows to the driving terminal DR of the integrated circuit 4 to generate heat in the integrated circuit 4. As a result, the service life of the integrated circuit 4 is extended, as well as the size of the heat dissipation device for radiating heat generated by the integrated circuit 4 is reduced, thereby reducing the size of the product.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019850013926U KR890000287Y1 (en) | 1985-10-23 | 1985-10-23 | Circuit for preventing heat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019850013926U KR890000287Y1 (en) | 1985-10-23 | 1985-10-23 | Circuit for preventing heat |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR870007409U KR870007409U (en) | 1987-05-11 |
| KR890000287Y1 true KR890000287Y1 (en) | 1989-03-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019850013926U KR890000287Y1 (en) | 1985-10-23 | 1985-10-23 | Circuit for preventing heat |
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| Country | Link |
|---|---|
| KR (1) | KR890000287Y1 (en) |
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1985
- 1985-10-23 KR KR2019850013926U patent/KR890000287Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR870007409U (en) | 1987-05-11 |
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