Residential College | false |
Status | 已發表Published |
A Cross-Coupled Hybrid Switched-Capacitor Buck Converter With Extended Conversion Range and Enhanced DCR Loss Reduction | |
Qiaobo Ma1,2; Huihua Li1,2; Xiongjie Zhan1,2; Anyang Zhao1,2; Yang Jiang1,2; Man-Kay Law1,2; Rui P. Martins1,2,3; Pui-In Mak1,2 | |
2024-10 | |
Source Publication | IEEE Journal of Solid-State Circuits |
ISSN | 0018-9200 |
Volume | 59Issue:10Pages:3192-3203 |
Abstract | This article presents a hybrid switched-capacitor (SC) buck converter designed to optimize the reduction in inductor average current ( IL,DC) across a wide voltage conversion ratio (VCR) range for Li-ion battery-powered systems. The proposed topology is bases on a modified dual-path (DP) hybrid power stage structure and elevates the inductor de-energizing voltage to enhance IL,DC reduction. With a dual-branch interleaved cross-coupled structure, it reduces the required number of SC cells, thereby lowering costs. Moreover, the converter attains a seamless switching-phase transition around VCR of 0.5, ensuring smooth operations and simplifying control complexity. A stable efficiency is maintained across the entire VCR range by balancing inductor DC resistance (DCR) loss and switch/path conduction loss. In the circuit design aspect, a two-quadrant level shifter (2QLS) is proposed to meet power switch driving requirements in a positive-negative wide-range floating domain. Fabricated in a 180-nm BCD process with a 4.42 mm2 chip area, the converter prototype attains a peak conversion efficiency of 91% when converting a 2.7 ∼ 4.2 V input to a 1 ∼ 1.8 V output. It delivers a maximum load current of 4.2 A using two 4.7-μH inductors with 175 m Ω DCR in 16.7 mm3 each and achieves an average efficiency of 90% with only 1.5% variation. |
Keyword | Cross-coupled Dc Resistance (Dcr) Hybrid Switched-capacitor (Sc) Inductor Current Reduction Level Shifter |
DOI | 10.1109/JSSC.2024.3416408 |
URL | View the original |
Indexed By | SCIE |
Language | 英語English |
WOS Research Area | Engineering |
WOS Subject | Engineering, Electrical & Electronic |
WOS ID | WOS:001263381300001 |
Publisher | IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 445 HOES LANE, PISCATAWAY, NJ 08855-4141 |
Scopus ID | 2-s2.0-85204699607 |
Fulltext Access | |
Citation statistics | |
Document Type | Journal article |
Collection | Faculty of Science and Technology THE STATE KEY LABORATORY OF ANALOG AND MIXED-SIGNAL VLSI (UNIVERSITY OF MACAU) INSTITUTE OF MICROELECTRONICS DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING |
Corresponding Author | Yang Jiang |
Affiliation | 1.State Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, University of Macau, Macao 2.ECE Department, Faculty of Science and Technology, University of Macau, Macao 3.On leave from Instituto Superior Tecnico, Universidade de Lisboa, Lisboa, Portugal |
First Author Affilication | University of Macau; Faculty of Science and Technology |
Corresponding Author Affilication | University of Macau; Faculty of Science and Technology |
Recommended Citation GB/T 7714 | Qiaobo Ma,Huihua Li,Xiongjie Zhan,et al. A Cross-Coupled Hybrid Switched-Capacitor Buck Converter With Extended Conversion Range and Enhanced DCR Loss Reduction[J]. IEEE Journal of Solid-State Circuits, 2024, 59(10), 3192-3203. |
APA | Qiaobo Ma., Huihua Li., Xiongjie Zhan., Anyang Zhao., Yang Jiang., Man-Kay Law., Rui P. Martins., & Pui-In Mak (2024). A Cross-Coupled Hybrid Switched-Capacitor Buck Converter With Extended Conversion Range and Enhanced DCR Loss Reduction. IEEE Journal of Solid-State Circuits, 59(10), 3192-3203. |
MLA | Qiaobo Ma,et al."A Cross-Coupled Hybrid Switched-Capacitor Buck Converter With Extended Conversion Range and Enhanced DCR Loss Reduction".IEEE Journal of Solid-State Circuits 59.10(2024):3192-3203. |
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