Patent ID: 8547143

Claim:
A resonant gate drive circuit for a power switching device for a high frequency power converter, comprising: a signal input source; a power supply; a resonant inductor; an electrical isolator connected between the signal input source and a switching node, the electrical isolator being connected to the power supply; a first bidirectional switch connected between the resonant inductor and the power switching device and including a first switch control circuit connected to the switching node to be controlled by a signal from the signal input source; and a second bidirectional switch connected between the power supply and the power switching device and including a second switch control circuit connected to the switching node to be controlled by the signal from the signal input source, wherein the first and second control circuits are adapted to control the first bidirectional switch to provide a first charge path during a resonant period from the resonant inductor to gate-emitter capacitance of the power switching device defining a quick resonant charge path and to control the second bidirectional switch to provide a second charge path defining a voltage equalization charge path subsequent to the resonant period.