PFC转换器-三相输入

Topologies for enhanced efficiency

An interleaving architecture with two or more small interleaved stages is also useful to help achieve higher power densities. Or to further enhance efficiency of the combined PFC and rectifier front-end, bridgeless topologies have emerged that can help reduce conduction loss by minimizing the number of semiconductor switches in the line-current path. For high-power systems with higher current, both Continuous Conduction Mode (CCM) and Transition mode (TM) operations are required and a new patented approach with fixed off-time (FOT) operation can provide great advantages.

Our products and solutions

ST's extended offer of advanced PFC digital controllers and high-performance STM32 microcontrollers support interleaved and bridgeless topologies.  To help design robust and high-efficient PFC stages, these devices embed all the required protection features including output overvoltage, brown-out, feedback disconnection and boost inductor saturation. 

Developers will also appreciate our power MOSFETs and rectifiers including silicon-carbide (SiC) galvanically isolated gate drivers and a range of hardware and software evaluation and development tools.