A Family of Quasi-Parallel DC–DC Converter With Three-Port Resonant Switched-Capacitor Circuit

Wenhao Xie; Jialong Huang; Haoran Chen; Shouxiang Li; Keyue Ma Smedley; Xiangou Zhu; Yuxing Dai

doi:10.1109/TPEL.2025.3605488

A Family of Quasi-Parallel DC–DC Converter With Three-Port Resonant Switched-Capacitor Circuit

Wenhao Xie
, Jialong Huang
, Haoran Chen
, Shouxiang Li^*
, Keyue Ma Smedley
, Xiangou Zhu
, Yuxing Dai^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

Resonant switched-capacitor circuits are attractive for power integration, but encounter limited voltage regulation range and efficiency. This article proposes a family of quasi-parallel dc–dc converter with three-port resonant switched-capacitor circuit (TR-RSCC). The technique of partial power processing is deployed by merging the unregulated TP-RSCC with a wide-range voltage regulator, featuring efficient wide-range voltage regulation. The modularity and reconfigurability of transformerless TP-RSCC are analyzed to optimize the distribution of power flow and improve efficiency. Due to the soft-switching of all switches, the converter may operate at high frequency for high power density. The proposed quasi-parallel dc–dc converters with two types of voltage regulators are introduced as examples. In addition, the extension of a multiport circuit for bidirectional power flow and the control scheme are introduced. The 48–6 V experimental prototypes were built to verify the feasibility of the proposed two types of quasi-parallel dc–dc converters.

Original language	English
Pages (from-to)	640-652
Number of pages	13
Journal	IEEE Transactions on Power Electronics
Volume	41
Issue number	1
DOIs	https://doi.org/10.1109/TPEL.2025.3605488
Publication status	Published - Jan 2026
Externally published	Yes

Keywords

High power density
quasi-parallel converter
resonant switched-capacitor circuit (RSCC)
voltage regulation

Access to Document

10.1109/TPEL.2025.3605488

Cite this

@article{396306c2214646038d39d43de1298ad9,

title = "A Family of Quasi-Parallel DC–DC Converter With Three-Port Resonant Switched-Capacitor Circuit",

abstract = "Resonant switched-capacitor circuits are attractive for power integration, but encounter limited voltage regulation range and efficiency. This article proposes a family of quasi-parallel dc–dc converter with three-port resonant switched-capacitor circuit (TR-RSCC). The technique of partial power processing is deployed by merging the unregulated TP-RSCC with a wide-range voltage regulator, featuring efficient wide-range voltage regulation. The modularity and reconfigurability of transformerless TP-RSCC are analyzed to optimize the distribution of power flow and improve efficiency. Due to the soft-switching of all switches, the converter may operate at high frequency for high power density. The proposed quasi-parallel dc–dc converters with two types of voltage regulators are introduced as examples. In addition, the extension of a multiport circuit for bidirectional power flow and the control scheme are introduced. The 48–6 V experimental prototypes were built to verify the feasibility of the proposed two types of quasi-parallel dc–dc converters.",

keywords = "High power density, quasi-parallel converter, resonant switched-capacitor circuit (RSCC), voltage regulation",

author = "Wenhao Xie and Jialong Huang and Haoran Chen and Shouxiang Li and Smedley, \{Keyue Ma\} and Xiangou Zhu and Yuxing Dai",

note = "Publisher Copyright: {\textcopyright} 1986-2012 IEEE.",

year = "2026",

month = jan,

doi = "10.1109/TPEL.2025.3605488",

language = "English",

volume = "41",

pages = "640--652",

journal = "IEEE Transactions on Power Electronics",

issn = "0885-8993",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

number = "1",

}

TY - JOUR

T1 - A Family of Quasi-Parallel DC–DC Converter With Three-Port Resonant Switched-Capacitor Circuit

AU - Xie, Wenhao

AU - Huang, Jialong

AU - Chen, Haoran

AU - Li, Shouxiang

AU - Smedley, Keyue Ma

AU - Zhu, Xiangou

AU - Dai, Yuxing

PY - 2026/1

Y1 - 2026/1

N2 - Resonant switched-capacitor circuits are attractive for power integration, but encounter limited voltage regulation range and efficiency. This article proposes a family of quasi-parallel dc–dc converter with three-port resonant switched-capacitor circuit (TR-RSCC). The technique of partial power processing is deployed by merging the unregulated TP-RSCC with a wide-range voltage regulator, featuring efficient wide-range voltage regulation. The modularity and reconfigurability of transformerless TP-RSCC are analyzed to optimize the distribution of power flow and improve efficiency. Due to the soft-switching of all switches, the converter may operate at high frequency for high power density. The proposed quasi-parallel dc–dc converters with two types of voltage regulators are introduced as examples. In addition, the extension of a multiport circuit for bidirectional power flow and the control scheme are introduced. The 48–6 V experimental prototypes were built to verify the feasibility of the proposed two types of quasi-parallel dc–dc converters.

AB - Resonant switched-capacitor circuits are attractive for power integration, but encounter limited voltage regulation range and efficiency. This article proposes a family of quasi-parallel dc–dc converter with three-port resonant switched-capacitor circuit (TR-RSCC). The technique of partial power processing is deployed by merging the unregulated TP-RSCC with a wide-range voltage regulator, featuring efficient wide-range voltage regulation. The modularity and reconfigurability of transformerless TP-RSCC are analyzed to optimize the distribution of power flow and improve efficiency. Due to the soft-switching of all switches, the converter may operate at high frequency for high power density. The proposed quasi-parallel dc–dc converters with two types of voltage regulators are introduced as examples. In addition, the extension of a multiport circuit for bidirectional power flow and the control scheme are introduced. The 48–6 V experimental prototypes were built to verify the feasibility of the proposed two types of quasi-parallel dc–dc converters.

KW - High power density

KW - quasi-parallel converter

KW - resonant switched-capacitor circuit (RSCC)

KW - voltage regulation

UR - https://www.scopus.com/pages/publications/105015188552

U2 - 10.1109/TPEL.2025.3605488

DO - 10.1109/TPEL.2025.3605488

M3 - Article

AN - SCOPUS:105015188552

SN - 0885-8993

VL - 41

SP - 640

EP - 652

JO - IEEE Transactions on Power Electronics

JF - IEEE Transactions on Power Electronics

IS - 1

ER -

A Family of Quasi-Parallel DC–DC Converter With Three-Port Resonant Switched-Capacitor Circuit

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this