Flexible Mode Totem Pole PFC Rectifier with High Efficiency

In the case of a bidirectional AC-DC converter with constant output power, the lower the input voltage, the higher the input current. This increases conduction losses in the converter, reducing its work efficiency. A flexible mode Totem Pole power factor correction (PFC) converter is proposed in this paper. The converter adjusts its topology depending on the input voltage, with a totem pole PFC topology at high-line input and a three-level PFC topology at low-line input. Compared to conventional totem pole PFC, this converter has the advantage of high efficiency over a wide range of inputs. The working mode and control principle of the converter are analyzed. Finally, the feasibility and effectiveness of the converter are verified by simulation.