Efficient transformer-coupled gate driver circuit for power FET'

Details Efficient transformer-coupled gate driver circuit for power FET' Efficient transformer-coupled gate driver circuit for power FET'

1992-12-23

1994-04-12

Wambach, Margaret R.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307571, 307268, H03K 17687, H03K 330

Patent

active

053028627

ABSTRACT:
A gate driver circuit for a converter which requires an approximately 50% duty cycle to drive two power switching devices (e.g., in many interleaved, push-pull and bridge converters) includes a single transformer secondary winding coupled between the gates of the two devices. The transformer is reset every half-cycle by driving each device in the forward, or positive, direction only. Advantageously, the result is an approximately 50% reduction in gate drive power as compared with conventional schemes requiring a negative gate drive voltage for turn-off.

REFERENCES:
patent: 4461966 (1984-07-01), Hebenstreit

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