Interleaved-Boost-Input Type Isolated Full Bridge PFC Converter

Boost converters have been usually used to power factor correction. However, the conventional topology has some drawbacks such as high cost, large size, and low efficiency because the first-stage boost converter is connected with second-stage DC-DC converter. This paper proposes a new PFC converter where tow boost converters operating in an interleaving manner are connected to the transformer, and the output power is obtained from the equivalent full-bridge converter configuration. The steady state and the dynamic characteristics were analyzed. As a result, some good features of ZVS operation, small input current ripple, and high efficiency have been clarified by DC input and AC input experiments