On-State and Switching Performance of High-Voltage 15 – 20 kV 4H-SiC DMOSFETs and IGBTs
We compare the on-state and switching performance of high-voltage 4H-SiC n-channel DMOSFETs and p-channel IGBTs within a three-dimensional parameter space defined by blocking voltage, switching frequency, and current density. We determine the maximum current density each device can carry at a given switching frequency, such that the total power dissipation is 300 W/cm2. The IGBT current depends strongly on lifetime in the NPT buffer layer, and only weakly on lifetime in the drift layer. The MOSFET current is essentially independent of frequency.
Akira Suzuki, Hajime Okumura, Tsunenobu Kimoto, Takashi Fuyuki, Kenji Fukuda and Shin-ichi Nishizawa
T. Tamaki et al., "On-State and Switching Performance of High-Voltage 15 – 20 kV 4H-SiC DMOSFETs and IGBTs ", Materials Science Forum, Vols. 600-603, pp. 1143-1146, 2009