A Novel Expandable Diode-Capacitor Based DC-DC Converter with High Voltage Gains

This paper proposes an expandable high voltage gain non-isolated DC-DC converter. In the proposed converter, different kinds of voltage multiplier cells, such as diode-capacitor (D-C) and diode-capacitor-inductor (D-C-L) cells, are utilized to increase the output voltage gain. The proposed converter uses two switches with a simple switching pattern. Comparing to conventional diode-capacitor-based converters of the same type in the literatures, the proposed DC-DC step-up converter has much better features regarding the voltage conversion ratio and voltages stress on semiconductor elements. A 250 W prototype of the proposed converter was implemented in laboratory, and experimental results are presented to verify the theoretical analysis.