power factor correction (pfc) circuits

Power Factor Correction (PFC) Circuits Application Note 2019-11-06 1 © 2019 Toshiba Electronic Devices & Storage Corporation Outline A power factor correction (PFC) circuit is added to a power supply circuit to bring its power factor close to 1.0 or reduce harmonics. This application note discusses the basic topologies of the PFC circuits and their operations. There are three PFC techniques: 1) passive (static) PFC using a reactor; 2) switching (active) PFC that controls a current at high frequency using a switching device; and 3) partial-switching PFC that switches on and off a switching device to control the current a few times per mains cycle and whose applications are restricted. To reduce the size and improve the efficiency of power supplies, switching PFC circuits in various topologies have appeared, including interleaved and bridgeless PFC. Power Factor Correction (PFC) Circuits

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Page 1: Power Factor Correction (PFC) Circuits

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