This reference design is a 1kW bidirectional DC transformer (DCX), converting 800V DC bus into 12V with isolation. The design is controlled by F280039C and constantly operated at the resonant frequency of the resonant tank. The primary side uses LMG3622 GaN serial half bridge to handle up to 900V DC voltage. The serial half bridge (SHB) can be modified into full bridge and change the high-voltage side from 800V to 400V. The serial half bridge enables various PWM strategy and controls flexibility.
Features
- Natural bidirectional power flow
- Uses 650V GaN to handle 800V DC
- Active voltage balancing control
- Higher than 98.0% efficiency
- Small form factor, 50mm × 120mm × 35mm
- Flexible input and PWM strategy