Design of a GaN Totem-Pole PFC Converter Using DC-Link Voltage Control Strategy for Data Center Applications

In today’s power industry, a compact and highly efficient converter is the main component for server applications. The objective of this paper to propose totem-pole factor correction (PFC) with DC-link voltage control strategies data center Gallium Nitride High Electron Mobility Transistors (GaN HEMTs) are also used increase density conversion efficiency without reverse recovery loss. With derived equations loss, dc-bus strategy proposed improve efficiency. Furthermore, proposes hold-up time extension method DC bus under heavy load conditions. reduction link capacitor capacitance achievable, can be improved in wide range. A 2.9-kW GaN PFC prototype developed fabricated verify paper’s theoretical analysis. As demonstrated prototype’s experimental results, tested peak 98.5% total harmonic distortion (THD) less than 3%.