Single-stage input-current-shaping technique with voltage-doubler-rectifier front end

In this paper, a new single-stage input-current-shaping (ICS) technique that integrates the voltage-doubler-rectifier front end with a DC/DC output stage is introduced. Due to the voltage-doubler-rectifier front end, the reduction of line-current harmonics can be achieved with a higher conversion efficiency compared to the corresponding single-stage ICS circuit with the conventional wide-range full-bridge rectifier. In addition, the proposed technique requires energy-storage capacitors with a lower voltage rating and smaller total capacitance than the conventional single-stage ICS counterpart, which reduces the size and cost of the power supply. The performance of the proposed technique is evaluated on a 100 W (5 V/20 A) experimental prototype circuit.