.. PFC ICs typically provide functionality needed to shape the current waveform by gating the inductor current (Courtesy of Fairchild Semiconductor). Devices in this class typically combine an error amplifier, zero current detector, ...
.. can easily implement PFC in energy-harvesting applications using ICs from manufacturers including Cirrus Logic , Freescale Semiconductor , Fremont Micro Devices, Linear Technology , ON Semiconductor , Renesas , STMicroelectronics , ...