New transformer?less DC–DC converter topologies with reduced voltage stress on capacitors and increased voltage conversion ratio

This article proposes new transformer-less step-up/down and step-up DC–DC topologies providing numerous merits such as less voltage stress on capacitors, lower duty-cycle, higher conversion ratio compared to other converters. The proposed converters are extendible by benefiting from several switched-capacitors, making it possible transfer more power the converter. structures suitable for modern applications in which is desirable achieve high gains using non-extreme duty-cycles. For proving analysis claims, detailed comparison experimental results presented. In experiments, dynamic performance of also validated.