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Power Factor Correction is a technique of shaping input current to be as sinusoidal as possible to reduce harmonic distortion and associated losses and in-phase with input voltage in an AC circuit to have a power factor close to one.

Placed as a front end in relatively high-power switch mode power supplies (SMPS), a three-phase power factor corrector is designed with a number of different topologies to meet specific requirements. 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.

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.

pfc converter three phase input circuit diagram
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技术文档

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      AN5335
      35W transition-mode flyback converter with ultra-low THD based on HVLED007
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      AN4606
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      AN5335

      35W transition-mode flyback converter with ultra-low THD based on HVLED007

      AN4606

      Inrush-current limiter circuits (ICL) with Triacs and Thyristors (SCR) and controlled bridge design tips

出版刊物和宣传资料

    • 描述 版本 文档大小 操作
      1200V SiC diodes, 2 to 40 A in surface-mount and through-hole packages 1.0
      748.77 KB
      PDF
      Industrial-grade SiC diodes - 650V and low VF - to boost the performance of power converters 2.0
      958.23 KB
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      ST Diodes Finder : the new app for Android and iOS 2.0
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      PDF

      1200V SiC diodes, 2 to 40 A in surface-mount and through-hole packages

      Industrial-grade SiC diodes - 650V and low VF - to boost the performance of power converters

      ST Diodes Finder : the new app for Android and iOS

    • 描述 版本 文档大小 操作
      Digital Controller Eases Design Of Interleaved PFC For Multi-kilowatt Converters by Rosario Attanasio, Giuseppe Di Caro, Sebastiano Messina, and Marco Torrisi, STMicroelectronics, Schaumburg, Ill and Catania, Italy 1.0
      1.96 MB
      PDF

      Digital Controller Eases Design Of Interleaved PFC For Multi-kilowatt Converters by Rosario Attanasio, Giuseppe Di Caro, Sebastiano Messina, and Marco Torrisi, STMicroelectronics, Schaumburg, Ill and Catania, Italy

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