Abstract
This paper proposes a different approach to combine stacked and cascaded configuration of dc/dc pulse-width modulation converter cells in order to access the benefits of both structures in a single-stage topology with a single active switch. In addition to presenting and discussing the concepts of cascaded, stacked, and the combination of both, this paper also proposes a new topology derived from these concepts. It provides high voltage conversion ratio with improved efficiency. As the name implies, this converter is obtained from the combination of two well-known dc/dc converter circuits, the Isolated Zeta Converter and the Quadratic-Boost Converter. Hence, it presents the combined features of both, i.e., high step-up voltage conversion, low input current ripple (Quadratic Boost features), and low output current ripple (Zeta’s feature). In order to verify the feasibility and performance of the converter presented, two 250-W prototypes circuits have been implemented.
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