AN4671

How to minimize conduction losses

DocID027654 Rev 1

3/17

1

How to minimize conduction losses

SiC MOSFETs require a higher gate voltage swing than standard super-junction MOSFETs

conduction losses.

It is therefore evident that SiC MOSFETs offer clear advantages over other SiC devices in

terms of:

•

DC current requirements – it does not require any gate current to sustain the

conduction state

•

simplified driving circuits – only gate resistors and a simple 0 to 20 V input waveform

are needed

It is unnecessary and even undesirable to drive SiC MOSFETs with more than +20 V in the

using a negative bias gate voltage to completely turn-off the device is treated in the

following section dedicated to the switching loss minimization.