POWER CONVERSION APPARATUS
First Claim
1. A power conversion apparatus, comprising:
- a power transistor, coupled to an input voltage, wherein a control terminal of the power transistor receives a control signal, and the power transistor converts the input voltage into an output voltage according to the control signal;
a thermal resistor, connected in series between the control terminal of the power transistor and a reference ground voltage, wherein the thermal resistor has a negative temperature coefficient; and
a temperature detection circuit, coupled to the thermal resistor and the power transistor, and generating the control signal and providing a driving current to the control terminal of the power transistor according to the control signal, wherein the temperature detection circuit further generates an over temperature protection signal according to the driving current.
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Accused Products
Abstract
A power conversion apparatus is disclosed. The power conversion apparatus includes a power transistor, a thermal resistor and a temperature detection circuit. A control terminal of the power transistor receives a control signal. The power transistor converts an input voltage into an output voltage according to the control signal. The thermal resistor has a negative temperature coefficient. The temperature detection circuit generates the control signal and provides a driving current to the control terminal of the power transistor according to the control signal. The temperature detection circuit further generates an over temperature protection signal according to the driving current.
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Citations
8 Claims
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1. A power conversion apparatus, comprising:
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a power transistor, coupled to an input voltage, wherein a control terminal of the power transistor receives a control signal, and the power transistor converts the input voltage into an output voltage according to the control signal; a thermal resistor, connected in series between the control terminal of the power transistor and a reference ground voltage, wherein the thermal resistor has a negative temperature coefficient; and a temperature detection circuit, coupled to the thermal resistor and the power transistor, and generating the control signal and providing a driving current to the control terminal of the power transistor according to the control signal, wherein the temperature detection circuit further generates an over temperature protection signal according to the driving current. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification