Analytical model for the influence of the gate-voltage on the forward conduction properties of the body-diode in SiC-MOSFETs

In this study, the influence of the gate-source voltage on the forward conduction properties of the body-diode in SiC-MOSFETs is demonstrated experimentally and analyzed by numerical simulations. Thereby, it can be figured out that the conduction properties of the body-diode strongly depend on the operational state of the MOS-capacitor. In depletion case, the current via the body-diode is dominant, whereby in accumulation and inversion mode the current mainly flows through the MOS-channel.