Performance Comparison between GaN-based Flying Capacitor and Active Neutral Point Clamped Three-Level Active Front End

This work presents a comprehensive performance assessment of two three-level converter prototypes based on GaN technology, designed for active front-end applications in on-board battery chargers. The study compares a Flying Capacitor topology and an Active Neutral Point Clamped configuration, both implemented using novel GaN power MOSFETs featuring 65mΩ on-state resistance RDS(on) and 650V drain-to-source blocking voltage. Experimental results obtained from three-phase, three-level configurations demonstrate that both topologies are characterized by high efficiency and low THD.