Flexible absolute circuit for advanced power factor correction controller

Abstract

In this paper, a flexible absolute circuit of advanced power factor correction (PFC) control for a bridgeless boost converter is proposed. The proposed circuit are able to eliminate the diode-bridge short-circuit problem if negative sensing signal is required by the power factor correction (PFC) controller. The polarity of the absolute circuit output could be changed just by reversing the polarity of the diodes. In addition, it is also has high input impedance. The proposed circuit could also be applied to other converters that uses hall effect sensor as the current sensing devices. Detailed analysis and design guidelines based on well-known PFC controller, UC3854AN are given.