A new topology for high step-up DC-DC converters

This paper proposes a new topology with high voltage gain and low voltage stress across the devices. The proposed converter combines the conventional boost converter with a switched-inductor branch (SIB) and one inductor-capacitor-diode (L-C-D) cell. The SIB is used at the input side which consists of three diodes and two inductors. During magnetization, the two inductors are charged in parallel and discharged in series during demagnetization. At the output side, above-mentioned L-C-D cell comprising two capacitors, one inductor, and one diode is used. Therefore, the proposed converter can achieve high voltage gains without extreme duty cycle values. Besides, the normalized devices voltage stress is low which causes the devices nominal voltage to be reduced. The operation principles are explained and the analysis of the devices voltage stress is accomplished. The circuit performance is compared with other solutions in the literature. Eventually, the converter operation is verified using simulation results.