Abstract:
A low-power low THD boost PFC with one cycle control is discussed. Two novel structures, the periodic self-starting timer and feedforward current control block, are intro...Show MoreMetadata
Abstract:
A low-power low THD boost PFC with one cycle control is discussed. Two novel structures, the periodic self-starting timer and feedforward current control block, are introduced to reduce the zero-crossing distortion. The improved boost PFC could regulate the switch turn-on time timely according to the ac input line voltage, and reduce the distortion near the input voltage zero-crossing points significantly. The experimental THD is only 3.8%, the power factor is 0.998, the load adjust rate is 3%, the linear adjust rate is less than 1%, and the efficiency is 96.9%. Both theoretical and practical results reveal that the improved PFC meets the demands for low-power and low THD.
Published in: 2011 9th IEEE International Conference on ASIC
Date of Conference: 25-28 October 2011
Date Added to IEEE Xplore: 27 February 2012
ISBN Information: