A self-scaling gate drive technique for efficiency improvement of DC-DC converters

This paper shows that the optimal driving voltages of power MOSFETs can be well modeled by a linear function of the load current. Thanks to the linear model, the self-scaling gate drive technique is proposed to improve the light-load efficiency of DC-DC converters by reducing gate driving loss. The gate drive voltage is scaled dynamically with respect to load current change. The proposed self-scaling gate drive technique can attain about 5.8% incremental enhancement on light-load efficiency.