Open AccessSynthesizing Step-Down Switched Capacitor Power Converter Topologies
Author(s) -
Zhiwen Gu,
Yuhang Zhang,
Yang Zhao,
Jinghua Zhang,
Yanhan Zeng,
Zhihong Luo,
Yongfu Li
Publication year - 2023
Publication title -
ieee transactions on circuits and systems i: regular papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.861
H-Index - 163
eISSN - 1558-0806
pISSN - 1549-8328
DOI - 10.1109/tcsi.2023.3336718
Subject(s) - components, circuits, devices and systems
The fast-growing development in wearable electronic devices leads to high demand for small-volume, lightweight, and high-efficiency DC-DC power converters, particularly switched capacitor (SC) DC-DC converters. In this paper, we propose a synthesis framework of step-down SC DC-DC power converters to obtain an optimum converter topology under the design constraints of the conversion ratio and a minimum number of capacitors. The proposed rule-based clustering reduction techniques have reduced the search space and sped up the conversion ratio analysis. In the case study of 8:1 converter synthesis, the run-time for conversion ratio analysis is reduced by $1.26 \,\, \boldsymbol {\times } \,\, \boldsymbol {10^{6}}$ . The proposed efficiency optimization method has improved the peak efficiencies of the cascaded 2:1 converter and Fibonacci converter by 4.7% and 12.8%. The proposed framework has identified new topologies and variants of conventional topologies. The variant of cascaded 2:1 converter shows an improvement of 8.2% on peak efficiency.