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This study presents an attractive closed-loop system of multiphase switched-capacitor coupled-inductor (MSCCI) converter as well as its relevant analysis and design to fulfill the task of high-gain DC-DC conversion/regulation. The power part of MSCCI is structurally composed of a three-stage switched-capacitor (SC) booster and a turn-ratio- n  coupled inductor. Under multiphase operation, the step-up gain can be uplifted intojust by using fewer circuit elements, whereis the duty cycle. When,, it can lift the output into 44 times voltage of supply theoretically. While raising  n  or, a bigger gain will be realised but it may result in the serious volume size or magnetic bias of coupled inductor. Here, the stage number of SC booster can be extendable for an additional gain to reduce these tensions. The control part is constructed by a non-overlapping circuit, phase generator, and pulse-width-modulation (PWM) compensator, so as to execute the topological multiphase operation and also increase the output regulation/robustness. Some theoretical analysis and control design are discussed. Finally, the validity of the analysis/design is examined via simulation results, and the practicality of this proposed converter is confirmed via experiments on the prototype circuit.

Design and analysis of multiphase switched-capacitor coupled-inductor converter for high-gain DC-DC conversion