Mitigating Shoot-Through Currents in Current-Controlled Gate Drivers

This paper proposes an optimized design for constant current source gate drivers (CCGDs) based on current mirrors for improved regulation of the switching traj ectories of SiC MOSFETs. CCGDs implemented using conventional current mirrors are likely subject to shoot-through fault when, which compromises current control and efficiency. The proposed design aims to mitigate shoot-through occurrences, thereby enhancing granularity of the gate current and reducing gate driver power losses, particularly for power switches with small input capacitance, such as SiC MOSFETs and low-current IGBTs. Simulation and experimental results demonstrate the improved performance of the optimized CCGD design, significantly enhancing the efficiency and accuracy of active current source gate drivers.