This reference design demonstrates a hybrid hysteresis control (HHC) method, a kind of current-mode control method on half-bridge LLC stage with a C2000™ F28004x microcontroller. The hardware is based on TIDA-010062, which is 1-kW, 80-Plus titanium, GaN CCM totem pole bridgeless PFC and half-bridge LLC reference design. A separate sensing card is added for hybrid hysteresis control, which recreates the voltage on the resonant capacitor. This HHC LLC stage shows better transient response and ease-of-control loop design compared with the single-loop voltage-mode control method (VMC).
Features
- Charge- or current-mode controlled LLC
- 10-kHz loop bandwidth
- < 100 µs settling time
- < 500-mV deviation under full-load transition
- Over-current and over-voltage protection
- Flexible synchronous rectification