Design and Analysis of a Single-Switch Energy-Stacking DC–DC Converter for Renewable Energy Integration

Abstract

A DC–DC power conversion topology based on a single controlled switch and high voltage elevation is developed, employing magnetic energy transfer and an integrated passive clamp to mitigate the voltage stress on the MOSFET. Operating at a duty cycle of 41.7%, the converter achieves an output–input voltage ratio of 16.67, stepping up from 24 V to 400 V. The proposed topology overcomes key limitations of conventional converters, including high losses at large duty cycles and excessive component counts in cascaded architectures. Comprehensive steady-state operation, voltage and current stress evaluation, power loss assessment, and passive component design are analytically investigated. Comparative evaluation with existing high step-up topologies and simulation validation are also presented. Simulation results under a 300 W output power condition demonstrate a peak efficiency of 95.44% and low output voltage ripple. The outcomes support the analytical framework and indicate the suitability of the proposed converter for real-world applications requiring stable high-voltage DC conversion from low-voltage sources.