STEVAL-DPSTPFC1
- Reference Design

3.6 kW PFC totem pole with inrush current limiter
Electrical standards, for switched-mode power supplies, demand increasingly higher power conversion efficiency, which in high power applications often implies costly active power factor correction stages to improve the harmonics and power factor on the mains AC supply line. The SL-DPSTPFC1, bridgeless Totem Pole PFC with full digital control, has proven in comprehensive testing and measurements to deliver low THD across wide input voltage and load conditions, and near unity power factor for high efficiency digital power supply applications. The STM32F334 microcontroller implements fine control loop regulation over wide operating ranges, ensuring high system reliability with smart inrush current control. Its rich set of analog peripherals, coupled with the totem pole architecture, contribute to reducing the overall bill of materials and consequent solution cost and size. The power section features very high performance 650V Silicon Carbide Power MOSFET in the high frequency leg, driven by the STGAP2S galvanically isolated gate driver. The low frequency leg instead uses 30A 1200V SCR thyristors to provide AC line polarity switching with active current limitation at power up or line drop recovery. A flyback circuit based on VIPer26LD high voltage converter completes the design by providing regulated voltages to both the power and control sections. A complete firmware application is included for reference, which can be modified according to specific application requirements.

Manufacturer	Categories	Application
STMicroelectronics	Microcontrollers	Battery Management