A High Efficiency DC/DC Converter for High Voltage Gain High Current Applications

Yaxiao Qin, Yun Yang, Sinan Li, Ying Huang, Siew-Chong Tan, S.Y.Ron Hui

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A new class of high-voltage-gain DC-DC converters for high efficiency and transformer-less DC-DC applications where large voltage step-up ratios are required, is presented in this paper. The converter is derived from the hybrid integration of a switched-capacitor converter and a boost converter. It features high step-up voltage conversion ratio with a moderate duty cycle; non-pulsating input current; low voltage stress on all of the switches; easy implementation of control and driving circuits; scalability for high current high-power applications; and low cost due to reduced components via combination of a two-stage converter into a single-stage converter. Full soft-charging operation and minimal device voltage stresses are achieved under all operating conditions. Steady-state operations of the converter are comprehensively analyzed. A 300 W prototype of a 19-time converter achieving the peak efficiency of 96.1experimental results validating the theoretical analysis and operation of the converter are provided.
Original languageEnglish
Journal IEEE Journal of Emerging and Selected Topics in Power Electronics
Publication statusE-pub ahead of print - 1 Apr 2019

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