Circuit configuration and method to reduce ringing in the semiconductor power switching circuits

摘要

A switching device includes a high-side MOSFET chip having a first high-side source connected to a low-side drain of a low-side MOSFET chip. The switching device further includes a transient reverse current diversion circuit connected to a drain of the low side MOSFET chip for diverting a reverse transient current therethrough whereby a reverse transient current in turning off the low side MOSFET chip is diverted from passing through a body diode of the low side MOSFET chip reducing a transient ringing oscillation. The reverse transient current diversion circuit includes a diode for conducting the reverse transient current from the drain. The reverse transient current diversion circuit further includes a capacitor connected between the diode and a source of the low side MOSFET chip.