High Temperature Characterization of SiC BJTs for Power Switching Applications

In this paper, SiC BJTs with a blocking voltage of 1836V are characterized in power switching applications for temperatures up to 275degC. Inductive switching speeds under different load current and DC bus voltage conditions are also studied. This is the first time a SiC switch has been fully characterized at a practically useful power level (300V, 7A) and a temperature substantially higher than any commercial power device is capable of. The reported results provide a comprehensive guide for high frequency switching of SiC BJTs in a practical power switching circuit