DC–DC High Step-up Converter with Low Count of Switches Based on Resonant Switched-Capacitor Topology

This paper presents the research results of a novel DC-DC boost converter with high voltage gain, low count of switches and low voltage stresses on the switches. The operation of the converter is based on the principle of a switched-capacitor voltage multiplier (SCVM) but the utilization of the components is very effective in the proposed idea, because the converter is able to charge two output capacitors with only one additional switch and a diode. An important benefit of the proposed converter is that the gate circuits do not require isolated supply and all the switches utilize bootstrap supply. The converter can be designed with air-based or planar PCB-type chokes. Therefore, it can achieve low weight, low volume, decreased cost and simplified assembling. The voltage stress on two switches is close to only half of the output voltage. The stresses on the other switches are much lower, which is very favorable. The converter can be designed in various switch technologies. In a design without ferrite cores and with WBG switches, the converter can operate at higher temperatures.