DC-DC converter with resonant gate drive
First Claim
1. A direct current to direct current voltage buck converter circuit comprising:
- a substantially static direct current voltage power supply;
a series synchronous rectifier coupled with the power supply;
an inductive-capacitive output voltage filter coupled with the series synchronous rectifier;
a control circuit coupled with an output terminal of the buck converter;
a voltage reference source coupled with the control circuit, wherein the control circuit compares a reference voltage generated by the voltage reference source with an output voltage generated by the buck converter, and produces a comparison signal based on that comparison; and
a resonant gate-drive circuit coupled with the control circuit and the series synchronous rectifier, wherein the resonant gate-drive circuit controls the series synchronous rectifier based, at least in part, on the signal produced by the control circuit.
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Accused Products
Abstract
A direct current to direct current boost or buck voltage converter in accordance with the invention includes a plurality of switching devices that effect voltage conversion and control current flow direction in the converter. The converter also includes a control circuit for comparing an output voltage of the converter with a reference voltage, where the control circuit produces a comparison signal based on that comparison. A resonant gate-drive circuit, also included in the converter and coupled with the control circuit and the plurality of switching devices, opens and closes the plurality of switches in response to the comparison signal to effect voltage conversion and control current flow direction.
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Citations
20 Claims
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1. A direct current to direct current voltage buck converter circuit comprising:
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a substantially static direct current voltage power supply;
a series synchronous rectifier coupled with the power supply;
an inductive-capacitive output voltage filter coupled with the series synchronous rectifier;
a control circuit coupled with an output terminal of the buck converter;
a voltage reference source coupled with the control circuit, wherein the control circuit compares a reference voltage generated by the voltage reference source with an output voltage generated by the buck converter, and produces a comparison signal based on that comparison; and
a resonant gate-drive circuit coupled with the control circuit and the series synchronous rectifier, wherein the resonant gate-drive circuit controls the series synchronous rectifier based, at least in part, on the signal produced by the control circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A direct current to direct current voltage converter comprising:
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a plurality of switching devices for effecting voltage conversion and controlling current flow direction in the converter;
a control circuit for comparing an output voltage of the converter with a reference voltage, wherein the control circuit produces a comparison signal based on the comparison of the output voltage and the reference voltage; and
a resonant gate-drive circuit coupled with the control circuit and the plurality of switching devices, wherein the resonant gate-drive circuit opens and closes the plurality of switches in response to the comparison signal to effect voltage conversion and control current flow direction. - View Dependent Claims (12, 13, 14)
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15. A direct current to direct current voltage buck converter comprising:
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an inductive-capacitive output voltage filter; and
a series synchronous rectifier coupled with the output voltage filter, wherein the rectifier comprises a first switching device and a second switching device, which, in operation, are opened and closed by a resonant gate-drive circuit having respective first and second inductive-capacitive drive circuits, such that the first and second switching devices operate substantially out of phase with respect to each other. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification