Thermistor with 3 terminals, thermistor-transistor, circuit for controlling heat of power transistor using the thermistor-transistor, and power system including the circuit
Electronics and Telecommunications Research Institute
대리인 / 주소
Rabin & Berdo, P.C.
인용정보
피인용 횟수 :
2인용 특허 :
4
초록▼
Provided are a thermistor with 3 terminals, a thermistor-transistor including the thermistor, a circuit for controlling heat of a power transistor using the thermistor-transistor, and a power system including the circuit. The circuit includes: a thermistor-transistor which comprises a thermistor hav
Provided are a thermistor with 3 terminals, a thermistor-transistor including the thermistor, a circuit for controlling heat of a power transistor using the thermistor-transistor, and a power system including the circuit. The circuit includes: a thermistor-transistor which comprises a thermistor having a resistance decreasing with an increase in temperature and a control transistor connected to the thermistor; and at least one power transistor which is connected to a driving device to control a supply of power to the driving device, wherein the thermistor-transistor is adhered to one of a surface and a heat-emitting part of the at least one power transistor and is connected to one of a base, a gate, a collector, and a drain of the at least one power transistor to decrease or block a current flowing in the at least one power transistor when the temperature of the at least one power transistor rises, so as to prevent the power transistor from heating up.
대표청구항▼
1. A circuit for controlling heat of a power transistor, comprising: a thermistor-transistor integrated into one chip, which comprises a thermistor having a resistance decreasing with an increase in temperature and a control transistor, wherein the thermistor is connected between two terminals of th
1. A circuit for controlling heat of a power transistor, comprising: a thermistor-transistor integrated into one chip, which comprises a thermistor having a resistance decreasing with an increase in temperature and a control transistor, wherein the thermistor is connected between two terminals of the control transistor; andat least one power transistor which is connected to a driving device to control a supply of power to the driving device,wherein the thermistor-transistor is adhered to one of a surface and a heat-emitting part of the at least one power transistor and is connected to one of a base, a gate, a collector, and a drain of the at least one power transistor to decrease or block a current flowing in the at least one power transistor when the temperature of the at least one power transistor rises, so as to prevent the at least one power transistor from heating up. 2. The circuit of claim 1, wherein the at least one power transistor comprises one of a NPN-type junction transistor, a PNP-type junction transistor, a MOS transistor, a photodiode (or a photo transistor) using light incident onto a base terminal, a photo relay, a photo SCR (silicon controlled rectifier), an IGBT (insulated-gate bipolar transistor), a SCR, and a triac. 3. The circuit of claim 1, wherein if the at least one power transistor is a junction transistor, the thermistor-transistor is connected between a base and an emitter of the at least one power transistor or between a collector and the emitter of the at least one power transistor, or if the at least one power transistor is a MOS transistor, the thermistor-transistor is connected between a gate and a source of the at least one power transistor or between a drain and the source of the at least one power transistor. 4. The circuit of claim 1, wherein the at least one power transistor is integrated into the one chip. 5. The circuit of claim 4, wherein the thermistor is disposed on the least one power transistor. 6. A circuit for controlling heat of a power transistor, comprising: a thermistor-transistor which comprises a thermistor having a resistance decreasing with an increase in temperature and a control transistor connected to the thermistor; andat least one power transistor which is connected to a driving device to control a supply of power to the driving device,wherein the thermistor-transistor is adhered to one of a surface and a heat-emitting part of the at least one power transistor and is connected to one of a base, a gate, a collector, and a drain of the at least one power transistor to decrease or block a current flowing in the at least one power transistor when the temperature of the at least one power transistor rises, so as to prevent the at least one power transistor from heating up,wherein the circuit comprises two power transistors which have opposite polarities and are connected to each other through one of a common base and a common gate, wherein the thermistor-transistor is commonly connected between one of the common base and the common gate and output terminals of the two power transistors, a first power transistor of the two power transistors is turned on to supply a current to the driving device, a second power transistor remains off, the thermistor-transistor decreases or blocks the current of the first power transistor when the temperature of the first power transistor rises, and the second power transistor is turned on to allow the current to flow so as to prevent the first power transistor from heating up. 7. The circuit of claim 6, wherein if the temperature of the first power transistor drops or a temperature of the second power transistor rises, the thermistor-transistor turns off the second power transistor and allows a normal current to flow in the first power transistor. 8. The circuit of claim 6, wherein a trigger transistor is connected to a base of the second power transistor. 9. The circuit of claim 6, wherein a combination of the two power transistors is one of a combination of two junction transistors, a combination of two MOS transistors, and a combination of a junction transistor and a MOS transistor. 10. A circuit for controlling heat of a power transistor, comprising: a thermistor-transistor which comprises a thermistor having a resistance decreasing with an increase in temperature and a control transistor connected to the thermistor; andat least one power transistor which is connected to a driving device to control a supply of power to the driving device,wherein the thermistor-transistor is adhered to one of a surface and a heat-emitting part of the at least one power transistor and is connected to one of a base, a gate, a collector, and a drain of the at least one power transistor to decrease or block a current flowing in the at least one power transistor when the temperature of the at least one power transistor rises, so as to prevent the at least one power transistor from heating up,wherein: one of a base and a gate of the control transistor is connected to one of the base and the gate of the at least one power transistor through the thermistor, one of an emitter and a source of the control transistor is connected to one of the emitter and the source of the at least one power transistor, and one of a collector and a drain of the control transistor is connected to one of the collector and the drain of the at least one power transistor; andwhen the at least one power transistor is turned on to supply the current to the driving device and the temperature of the at least one power transistor rises, the thermistor-transistor decreases or blocks the current of the at least one power transistor and allows a current to flow in the control transistor so as to prevent the at least one power transistor from heating up. 11. The circuit of claim 10, wherein the thermistor comprises at least one of a thermistor with 3 terminals, a MIT (metal-insulator transition) device and a resistor having a resistance varying with temperature. 12. The circuit of claim 10, wherein at least two thermistor-transistors are connected to the at least one power transistor in parallel, and control transistors of the at least two thermistor-transistors are respectively equally connected to the thermistor of the at least two thermistor-transistors and the at least one power transistor. 13. The circuit of claim 1, wherein the thermistor is formed using a p-n junction of a junction transistor, wherein the junction transistor is used as the at least one power transistor. 14. A circuit for controlling heat of a power diode, comprising: the power diode which comprises a first power diode and at least one second power diode connected to the first power diode in parallel and in a same polarity; anda current controlling device which is connected between the first power diode and the at least one second power diode,wherein a portion of large current flowing in the first power diode flows to the at least one second power diode through the current controlling device so as to control heat of the first power diode. 15. The circuit of claim 14, wherein the current controlling device comprises at least one of a thermistor, a MIT device and a resistor having a resistance varying with temperature. 16. The circuit of claim 14, wherein the circuit is packaged in one chip. 17. The circuit of claim 14, wherein the power diode is a LED, and the circuit is packaged with a light-transmitting lens. 18. The circuit of claim 14, wherein the power diode is a p-n junction diode and comprises one of an LED light bulb and an LED fluorescent lamp. 19. A power system comprising the circuit of claim 1. 20. The power system of claim 19, wherein the power system is one of a power controlling circuit of a cellular phone, a computer, a battery charging circuit, a motor controlling circuit, a power amp, and an electrical and electronic device and a control circuit system of a power supply, an IC (integrated circuit), an LED light bulb, an LED fluorescent lamp, and an LED illumination. 21. A power system comprising the circuit of claim 14.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (4)
Ikeda Yutaka,JPX ; Shikama Takashi,JPX ; Takaoka Yuichi,JPX ; Mihara Kenjiro,JPX, PTC thermistor elements and heating devices incorporating same.
Cantoro, Mirco; Wu, Zhenhua; Bhuwalka, Krishna; Kim, Sangsu; Maeda, Shigenobu, Semiconductor devices including field effect transistors and methods of forming the same.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.