Dynamic and static behavior of packaged silicon carbide MOSFETs in paralleled applications

Abstract

There is little work done to study the nuances related to paralleling the higher speed SiC Mosfet devices when compared to Si devices. This paper deals with the parallel operation of packaged silicon carbide (SiC) MOSFETs. The parameters that affect the static and dynamic current sharing behavior of the devices have been studied. We also investigate the sensitivity of those parameters to the junction temperature of the devices. The case temperature difference for paralleled MOSFETs has been experimentally measured on a SEPIC converter for different gate driver resistance and different switching frequency, the results show the current and temperature can be well balanced for the latest generation of SiC MOSFETs with low gate driver resistance.