A Three-Switch AC–DC Converter With Buck/Boost Ability, Low Leakage Current, and Continuous Input/Output Currents

This letter proposes a three-switch ac–dc converter with buck/boost ability, low leakage current, and continuous input/output currents. Therefore, a wide output voltage range and no bulky electromagnetic interference filters can be achieved. Furthermore, the proposed topology can transfer pulsating power, reducing the demand for the output capacitance. Without a complex structure, the total component count is only nine and a high power density can be obtained. In addition, benchmarking is provided to compare various performance aspects with existing topologies. Finally, the validity of the topology is verified by the experimental results.