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STMicroelectronics STEVAL-DPSTPFC1 Reference Design is a 3.6kW bridgeless totem pole boost circuit that implements a digital power factor correction (PFC) with an inrush current limiter (ICL). The STEVAL-DPSTPFC1 Design also opens the path to a compact converter running at 72kHz, offering a high peak efficiency, low THD distortion (97.5% with 3.7% THD), and reduced bill of materials. The STEVAL-DPSTPFC1 employs a robust circuit that meets EMC standards up to 4kV, delivering a high switching lifetime with reduced EMI emissions. The thyristor SCR used as an AC line polarity switcher enables an active current limitation at power-up or line drop recovery. The PFC efficiency is optimal, and no EMI bouncing effect occurs.
The STM STEVAL-DPSTPFC1 Reference Design achieves an innovative topology design with a silicon carbide MOSFET (SCTW35N65G2V), a thyristor SCR (TN3050H-12WY), an isolated FET driver (STGAP2S), and a 32-bit MCU (STM32F334). The reference design includes a power board with a bridgeless totem-pole boost (with an inrush limiter circuit, switch drivers, and an auxiliary power supply), a control board
with its MCU, a PFC/ICL control firmware, and an adapter board for software debug.
