Patent ID: 7236041

Claim:
Gate driver apparatus for charging and discharging a capacitive-gate control input of a power switching device utilized in a half- or a full-bridge circuit configuration operating with a wide range of duty cycles, the apparatus comprising: a transformer including a primary winding and a secondary winding; a DC-offset producing circuit connected to the secondary winding of the transformer, wherein the DC-offset producing circuit causes fast turn-on and turn-off of the power switching device; a pull-up-pull-down circuit including first and second complementary transistors connected to the DC-offset producing circuit, utilizing low driving voltage; a feedback circuit connecting a feedback port of the pull-up-pull-down circuit to a feedback port of the DC-offset producing circuit, wherein the feedback circuit; speeds up turn-off of the first transistor and turn-on of the second transistor; and a configuration wherein the pull-up-pull-down circuit controls the gate of the power switching device.