Transistor Driver Circuit of Power Converter
First Claim
1. A transistor drive circuit of a power converter, comprising:
- an input terminal to receive a supply voltage;
an output terminal to output a switching signal for driving a transistor of the power converter;
an N-type high-side transistor having a drain terminal coupled to the input terminal, a source terminal of the N-type high-side transistor coupled to the output terminal;
a P-type high-side transistor having a source terminal coupled to the input terminal, a drain terminal of the P-type high-side transistor coupled to the output terminal;
an N-type low-side transistor having a drain terminal coupled to the output terminal, a source terminal of the N-type low-side transistor coupled to a ground;
a first control circuit coupled to control the gate terminal of the N-type high-side transistor and the gate terminal of the P-type high-side transistor; and
a second control circuit coupled to control the gate terminal of the N-type low-side transistor.
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Accused Products
Abstract
A transistor drive circuit of a power converter is developed for operating in wide voltage range. It includes an N-type high-side transistor, a P-type high-side transistor and an N-type low-side transistor. A voltage clamp device is connected to the gate of the N-type high-side transistor to limit the maximum output voltage. A detection circuit is coupled to detect the supply voltage of the transistor drive circuit to generate a disable signal in response to the voltage level of the supply voltage. The disable signal is coupled to disable the P-type high-side transistor once the voltage level of the supply voltage is higher than a threshold voltage.
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Citations
12 Claims
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1. A transistor drive circuit of a power converter, comprising:
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an input terminal to receive a supply voltage; an output terminal to output a switching signal for driving a transistor of the power converter; an N-type high-side transistor having a drain terminal coupled to the input terminal, a source terminal of the N-type high-side transistor coupled to the output terminal; a P-type high-side transistor having a source terminal coupled to the input terminal, a drain terminal of the P-type high-side transistor coupled to the output terminal; an N-type low-side transistor having a drain terminal coupled to the output terminal, a source terminal of the N-type low-side transistor coupled to a ground; a first control circuit coupled to control the gate terminal of the N-type high-side transistor and the gate terminal of the P-type high-side transistor; and a second control circuit coupled to control the gate terminal of the N-type low-side transistor. - View Dependent Claims (2, 3, 4, 5)
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6. A transistor drive circuit for driving a switching transistor of a power converter, comprising:
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an input terminal to receive a supply voltage; an output terminal to output a switching signal for driving the switching transistor; a first type-I transistor coupled between the input terminal and the output terminal; a first type-II transistor coupled between the input terminal and the output terminal; a second type-I transistor coupled between the output terminal and a ground; and a control circuitry to control the type-I and type-II transistors in response to a control signal. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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Specification