Efficiency Analysis of Bridgeless PFC Boost Converter with the Conventional Method

Conventional boost PFC suffers from the high conduction loss in the input rectifier-bridge. Higher efficiency can be achieved by using the bridgeless boost topology. The efficiency of various PFC topologies is studied based on its classification. Two types of PFC topology classification are proposed namely the full-bridge with 1 DC/DC converter and a Bridgeless converter. PFC circuit with low power application is the main concern in this study. In this paper, a detailed description of the operation of the proposed circuit is given. Based on the analysis, the component selection is presented. The most commonly methods used to calculate the power losses is discussed and compared for the various topologies.