Charge-pump based sixth-order interleaved boost converter

This paper presents an analysis and design of a charge-pump based sixth-order boost converter. The voltage gain of the converter is almost double in comparison to the conventional boost converter. Reduction in the source current ripples is primarily achieved through interleaved gating scheme. The additional capacitance (C) in the feedback path is responsible for further reduction in source current ripples. A steady-state and dynamic analysis is established to predetermine the circuit performance. This includes the current sharing on two parallel branches of the boost converter. Small-signal transfer functions are formulated to analyze the current sharing behavior during dynamical conditions. A24 to 100 V, 50 W prototype is designed for verification of source current ripples reduction and load sharing. Simulation and experimental results are presented to validate the proposed design, voltage regulation and the load division in the parallel interleaved boost-cells without using any current-mode controller. Experimental measurements are in close correlation to analytical predictions.