High frequency ZVS self-driven full-bridge using full integration of magnetics

This paper describes a ZVS full bridge topology with a self-driven current doubler secondary side topology. The unique attribute of this topology is that it utilizes a full integration of magnetic components. The integrated magnetic includes both output inductors of the current doubler, a main power transformer windings, and two self-driven gate drive transformers all in one EE/EI core. This topology and integration technique is demonstrated in an eighth brick form factor that switches at 600 kHz and can achieve 65 A load current with 1.2 V output while maintaining greater than 87% efficiency at full load.