Switched capacitor based soft-switching DC-DC boost converter for high voltage gain

Abstract

A switched capacitor based step up converter with high voltage gain is proposed in this paper. The proposed novel topology of the boost converter can provide almost threefold output voltage relative to its input at 50% duty cycle. In order to guarantee small switching losses and to eliminate the current spikes problem across the switches (which usually exists in classical converter), an inductor is used in the circuit which creates a resonant tank and assist in zero current switching (ZCS). In addition, the efficiency curve of the new converter circuit shows high value for a wide range of output power which is rare in literature. Besides, this proposed topology is free from the circuitry design complexity. In renewable energy systems like photovoltaic panels or fuel cells, where a high step up voltage is required, the proposed converter can bear its suitability.