Power supply circuit and reuse of gate charge
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United States of America Patent
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Oct 15, 2013
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N/A
app pub date -
Jun 15, 2007
filing date -
Jun 15, 2007
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Abstract
To reduce gate-drive losses caused by high switching frequency operation, embodiments herein include a novel resonant gate driver circuit for driving switches. This gate drive circuit can include a simple two-half-bridge structure. A coupling inductor of the resonant gate driver circuit can provide energy circulation between gates of high and low side switches and also works as a voltage-boost transformer. According to one configuration, the resonant gate driver circuit can be extended to drive two MOSFETs with a common ground. Both theoretical and simulation results for the new resonant gate driver circuit illustrate increased efficiency via lower switching losses.
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