A Low Complexity Active Gate Driver to Damp the Oscillations Caused by Switching Power Transistors

The reduction of overshoots/undershoots and oscillations affecting the switching waveforms in hard-switched power circuits can be achieved by exploiting Active Gate Drivers (AGDs). The ones proposed so far are featured by a large number of driving levels and time intervals, resulting in time consuming optimization procedures. In this work, an AGD featuring two degrees of freedom is proposed and its effectiveness is experimentally validated. To this purpose, the undershoot affecting the drain-source voltage is considered as an indirect measure of oscillation damping at the power transistor turn-on.