Design Win

Firmware for the 3 kW telecom rectifier based on the STM32G474RBT6 digital power MCU

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The STSW-3KWTLCP firmware package demonstrates the capability of the STDES-3KWTLCP telecom rectifier reference design to meet high-performance requirements. A digital solution by the STM32G474RBT6 digital power MCU is used for both PFC and DC-DC stages.
The STSW-3KWTLCP allows controlling the PFC stage by using a bridgeless totem-pole topology. It also controls the DC-DC stage by using a full bridge LLC topology.
Thanks to the full digitalization and to dedicated control algorithms, the STDES-3KWTLCP achieves a low THD distortion, which is less than 5% at full load, a reliable operation with dynamic load conditions, and a high overall efficiency.
  • 特徴

    • Maximum 184 ps PWM resolution
    • Simultaneous voltage/current sampling by multiple ADCs (up to five)
    • Critical protections by faster comparators (up to seven)
    • Input/output overcurrent protections
    • Undervoltage/overvoltage protections
    • On-line coefficient tuning via UART
    • CPU effort reduction by hardware filter mathematical accelerator (FMAC)
    • Blanking and soft-start scheme of PWM modulation for current spike issues at AC zero crossing (PFC)
    • Adaptive algorithm for synchronous rectification (SR) control to improve overall efficiency (LLC)