Topological circuit design of vehicle-mounted OBC

The topology circuit design of the vehicle OBC usually adopts a two-stage architecture, including the front-stage PFC and the rear-stage DC/DC circuit. The front-stage PFC is mainly responsible for power factor correction and generally outputs 400V DC. The rear-stage DC/DC circuit realizes isolation and voltage regulation functions, and outputs 200-500V high-voltage DC. This design aims to pursue high frequency, high power factor and high efficiency.