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

In this paper, a new single-stage input-current-shaping ((SICS)-I-2) techni que that integrates the voltage-doubler-rectifier front end with a dc/dc ou tput stage is introduced. Due to the voltage-doubler-rectifier front end, a reduction of line-current harmonics can be achieved with a higher conversi on efficiency compared to the corresponding S2ICS circuit with the conventi onal wide-range full-bridge rectifier. The proposed technique requires ener gy-storage capacitors with the same total capacitance and with half of the voltage rating as in the conventional S2ICS counterpart, which reduces the size and cost of the power supply. The performance of the proposed techniqu e is evaluated on a 450-W (5-V/90-A) experimental prototype circuit.