Turn-off and short circuit behaviour of 4H SiC JFETs

In this paper, the dynamic characteristics of a SiC switching power device are described. The switch is realised as a cascode configuration, consisting of the series connection of a low voltage Si MOSFET and a high voltage SiC JFET. This switch is able to operate both as switch and as freewheeling diode. Turn-off behaviour of this switch is reported, whereas turn-off means both turning off in "switch" operation as well as turning off in "diode" operation. Finally, short circuit operation of the switch is demonstrated.