Circuit principle of adding PFC to power supply design
Overview:
Prior to the entry into force of the latest IEC61000-3-2 standard in 2005, most PC, monitor, and television power supplies generated excessive power line harmonics when powered from 110 to 120V, 60Hz single-phase AC. Driven by this more rigorous IEC standard, power supply manufacturers are beginning to minimize power line harmonics by adding power factor correction (PFC). This article describes the principle of adding a PFC to a power supply design.
(Please read the PDF for details)
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