TIDUEZ3A April 2021 – June 2022
This reference design is a 4-kW CCM totem pole PFC using the F280049 or F280025 controlCARD and LMG342x EVM board. This design demonstrates a cost-effective and robust PFC controller, which avoids isolated current sense by putting the ground of the controller on the middle of the MOSFET leg. The benefits from non-isolation, AC current sense can be implemented with the OPA607 high-speed amplifier for reliable overcurrent protection. In this design, efficiency, thermal image, AC drop, lighting surge, and EMI CE are fully validated. The test data in this reference design illustrates the maturity of the totem-pole PFC with C2000 and GaN, and is a good platform for the PFC stage design of high-efficiency products.