A New Resonant Gate Driver with Two Half Bridge Structures for Both Top Switch and Bottom Switch

To reduce gate driving losses caused by high switching frequency operation, a new resonant gate driver for driving both top switch and bottom switch is presented in this paper. This new gate drive circuit has a simple two-half-bridge structure. A coupled inductor is used for energy circulation between gates of switches and also works as a voltage-boost transformer. It is more interesting that it also can be extended to drive two MOSFETs with common ground. Theoretical and simulation results prove operation and driving loss saving efficiency of the proposed resonant gate drive circuit.