An Ultrahigh Step-Down DC-DC Converter Based on Switched-Capacitor and Coupled Inductor Techniques

Longyang Yu; Chengzi Yang; Wei Mu; Fengtao Yang; Huaqing Li; Laili Wang; Yuquan Su; Chi Zhang

doi:10.1109/ECCE47101.2021.9595577

An Ultrahigh Step-Down DC-DC Converter Based on Switched-Capacitor and Coupled Inductor Techniques

Longyang Yu
, Chengzi Yang
, Wei Mu
, Fengtao Yang
, Huaqing Li
, Laili Wang
, Yuquan Su
, Chi Zhang

School of Electrical Engineering

Xi'an Jiaotong University
MiSiliconn Semiconductor Technologies Co. Ltd

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

High step-down dc-dc converters are widely employed in data center applications. Due to the higher stepdown conversion ratio in the new generation 48V voltage regulator module (VRM), a conventional buck converter is not suitable for such applications. To conquer this problem, a novel dc-dc converter is proposed in this paper to achieve an ultrahigh step-down voltage conversion ratio for data centers. The non-isolated topology can be optimally designed to integrate both the switched-capacitor and coupled inductor techniques, which allows Zero-Voltage-Switching (ZVS) of all active switches to be achieved and improves high efficiency. In addition, the converter presents the advantages of lower voltage stress, ultrahigh voltage gain, common ground and simple control strategy. A comprehensive analysis of the steady-state analysis, derivation of voltage gain, voltage stress and ZVS condition is presented in detail. Finally, a 30W, 48-to-IV experimental prototype is built and tested, which validates the ultrahigh step-down voltage gain and soft-switching characteristic of the proposed converter. The maximum efficiency of the prototype is 89.1% and the efficiency is 81.4% in full-load condition.

Original language	English
Title of host publication	2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	2011-2016
Number of pages	6
ISBN (Electronic)	9781728151359
DOIs	https://doi.org/10.1109/ECCE47101.2021.9595577
State	Published - 2021
Event	13th IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Virtual, Online, Canada Duration: 10 Oct 2021 → 14 Oct 2021

Publication series

Name	2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings

Conference

Conference	13th IEEE Energy Conversion Congress and Exposition, ECCE 2021
Country/Territory	Canada
City	Virtual, Online
Period	10/10/21 → 14/10/21

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Zero-Voltage-Switching
coupled inductor
dc-dc power converters
switched-capacitor
ultrahigh step-down voltage gain

Access to Document

10.1109/ECCE47101.2021.9595577

Cite this

Yu, L., Yang, C., Mu, W., Yang, F., Li, H., Wang, L., Su, Y., & Zhang, C. (2021). An Ultrahigh Step-Down DC-DC Converter Based on Switched-Capacitor and Coupled Inductor Techniques. In 2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings (pp. 2011-2016). (2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ECCE47101.2021.9595577

Yu, Longyang ; Yang, Chengzi ; Mu, Wei et al. / An Ultrahigh Step-Down DC-DC Converter Based on Switched-Capacitor and Coupled Inductor Techniques. 2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2021. pp. 2011-2016 (2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings).

@inproceedings{8fcb6aac52bd449eb7748bfcd6232ba0,

title = "An Ultrahigh Step-Down DC-DC Converter Based on Switched-Capacitor and Coupled Inductor Techniques",

abstract = "High step-down dc-dc converters are widely employed in data center applications. Due to the higher stepdown conversion ratio in the new generation 48V voltage regulator module (VRM), a conventional buck converter is not suitable for such applications. To conquer this problem, a novel dc-dc converter is proposed in this paper to achieve an ultrahigh step-down voltage conversion ratio for data centers. The non-isolated topology can be optimally designed to integrate both the switched-capacitor and coupled inductor techniques, which allows Zero-Voltage-Switching (ZVS) of all active switches to be achieved and improves high efficiency. In addition, the converter presents the advantages of lower voltage stress, ultrahigh voltage gain, common ground and simple control strategy. A comprehensive analysis of the steady-state analysis, derivation of voltage gain, voltage stress and ZVS condition is presented in detail. Finally, a 30W, 48-to-IV experimental prototype is built and tested, which validates the ultrahigh step-down voltage gain and soft-switching characteristic of the proposed converter. The maximum efficiency of the prototype is 89.1\% and the efficiency is 81.4\% in full-load condition.",

keywords = "Zero-Voltage-Switching, coupled inductor, dc-dc power converters, switched-capacitor, ultrahigh step-down voltage gain",

author = "Longyang Yu and Chengzi Yang and Wei Mu and Fengtao Yang and Huaqing Li and Laili Wang and Yuquan Su and Chi Zhang",

note = "Publisher Copyright: {\textcopyright} 2021 IEEE.; 13th IEEE Energy Conversion Congress and Exposition, ECCE 2021 ; Conference date: 10-10-2021 Through 14-10-2021",

year = "2021",

doi = "10.1109/ECCE47101.2021.9595577",

language = "英语",

series = "2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings",

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

pages = "2011--2016",

booktitle = "2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings",

}

Yu, L, Yang, C, Mu, W, Yang, F, Li, H, Wang, L, Su, Y & Zhang, C 2021, An Ultrahigh Step-Down DC-DC Converter Based on Switched-Capacitor and Coupled Inductor Techniques. in 2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings. 2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings, Institute of Electrical and Electronics Engineers Inc., pp. 2011-2016, 13th IEEE Energy Conversion Congress and Exposition, ECCE 2021, Virtual, Online, Canada, 10/10/21. https://doi.org/10.1109/ECCE47101.2021.9595577

An Ultrahigh Step-Down DC-DC Converter Based on Switched-Capacitor and Coupled Inductor Techniques. / Yu, Longyang; Yang, Chengzi; Mu, Wei et al.
2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2021. p. 2011-2016 (2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - An Ultrahigh Step-Down DC-DC Converter Based on Switched-Capacitor and Coupled Inductor Techniques

AU - Yu, Longyang

AU - Yang, Chengzi

AU - Mu, Wei

AU - Yang, Fengtao

AU - Li, Huaqing

AU - Wang, Laili

AU - Su, Yuquan

AU - Zhang, Chi

PY - 2021

Y1 - 2021

N2 - High step-down dc-dc converters are widely employed in data center applications. Due to the higher stepdown conversion ratio in the new generation 48V voltage regulator module (VRM), a conventional buck converter is not suitable for such applications. To conquer this problem, a novel dc-dc converter is proposed in this paper to achieve an ultrahigh step-down voltage conversion ratio for data centers. The non-isolated topology can be optimally designed to integrate both the switched-capacitor and coupled inductor techniques, which allows Zero-Voltage-Switching (ZVS) of all active switches to be achieved and improves high efficiency. In addition, the converter presents the advantages of lower voltage stress, ultrahigh voltage gain, common ground and simple control strategy. A comprehensive analysis of the steady-state analysis, derivation of voltage gain, voltage stress and ZVS condition is presented in detail. Finally, a 30W, 48-to-IV experimental prototype is built and tested, which validates the ultrahigh step-down voltage gain and soft-switching characteristic of the proposed converter. The maximum efficiency of the prototype is 89.1% and the efficiency is 81.4% in full-load condition.

AB - High step-down dc-dc converters are widely employed in data center applications. Due to the higher stepdown conversion ratio in the new generation 48V voltage regulator module (VRM), a conventional buck converter is not suitable for such applications. To conquer this problem, a novel dc-dc converter is proposed in this paper to achieve an ultrahigh step-down voltage conversion ratio for data centers. The non-isolated topology can be optimally designed to integrate both the switched-capacitor and coupled inductor techniques, which allows Zero-Voltage-Switching (ZVS) of all active switches to be achieved and improves high efficiency. In addition, the converter presents the advantages of lower voltage stress, ultrahigh voltage gain, common ground and simple control strategy. A comprehensive analysis of the steady-state analysis, derivation of voltage gain, voltage stress and ZVS condition is presented in detail. Finally, a 30W, 48-to-IV experimental prototype is built and tested, which validates the ultrahigh step-down voltage gain and soft-switching characteristic of the proposed converter. The maximum efficiency of the prototype is 89.1% and the efficiency is 81.4% in full-load condition.

KW - Zero-Voltage-Switching

KW - coupled inductor

KW - dc-dc power converters

KW - switched-capacitor

KW - ultrahigh step-down voltage gain

UR - https://www.scopus.com/pages/publications/85123362796

U2 - 10.1109/ECCE47101.2021.9595577

DO - 10.1109/ECCE47101.2021.9595577

M3 - 会议稿件

AN - SCOPUS:85123362796

T3 - 2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings

SP - 2011

EP - 2016

BT - 2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 13th IEEE Energy Conversion Congress and Exposition, ECCE 2021

Y2 - 10 October 2021 through 14 October 2021

ER -

Yu L, Yang C, Mu W, Yang F, Li H, Wang L et al. An Ultrahigh Step-Down DC-DC Converter Based on Switched-Capacitor and Coupled Inductor Techniques. In 2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings. Institute of Electrical and Electronics Engineers Inc. 2021. p. 2011-2016. (2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings). doi: 10.1109/ECCE47101.2021.9595577

An Ultrahigh Step-Down DC-DC Converter Based on Switched-Capacitor and Coupled Inductor Techniques

Abstract

Publication series

Conference

UN SDGs

Keywords

Access to Document

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