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A New Approach to Improve the Voltage Conversion Ratio in Topological Switched-capacitor DC-DC Converters Using Negator Stage
  • Yaqub Mahnashi
Yaqub Mahnashi
King Fahd University of Petroleum & Minerals

Corresponding Author:[email protected]

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Abstract

This paper provides a simple yet novel structure to achieve voltage conversion ratio (VCR) that exceeds the theoretical attainable VCR of topological switched-capacitor DC-DC converters (SCC). Typically, the SCC terminals are connected to the input voltage, the output voltage, or the ground reference. The proposed structure in this paper utilizes the ground-connected terminals and instead connecting them to negative input voltage provided by a negator stage. Here, two types of SCC are used as case studies: Series-parallel (SPSC) and Fibonacci (FSC). The model for the proposed structure is constructed and verified experimentally using 3-stage SPSC and FSC. The experimental results are in good agreement with the proposed model with an error of less than 5% in all cases. The VCR obtained from the proposed structure exceeds the theoretical limits of conventional topological structures.
Apr 2023Published in IEEE Transactions on Circuits and Systems II: Express Briefs volume 70 issue 4 on pages 1465-1469. 10.1109/TCSII.2022.3225869