A 24V-to-1V Triple Series-Capacitor Buck Converter With Low-Voltage Power Switches

IF 4 2区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Circuits and Systems II: Express Briefs Pub Date : 2024-09-23 DOI:10.1109/TCSII.2024.3465832

Weidong Xue;Xinwei Yu;Yisen Zhang;Junyan Ren

{"title":"A 24V-to-1V Triple Series-Capacitor Buck Converter With Low-Voltage Power Switches","authors":"Weidong Xue;Xinwei Yu;Yisen Zhang;Junyan Ren","doi":"10.1109/TCSII.2024.3465832","DOIUrl":null,"url":null,"abstract":"This brief introduces a 24V-to-1V hybrid converter with low-voltage power switches. By incorporating three flying capacitors in series with a two-phase switched-inductor, the proposed converter effectively functions as a 4.8V-to-1V converter. Thus, a high-voltage design is realized with low-voltage transistors known for their excellent figure of merit. As a result, the hybrid converter achieves an effective duty cycle five times higher and a better conversion efficiency compared with a double step-down converter (DSD) and a double series-capacitor converter (DSCBC) under identical power switch sizes and working conditions. The circuit is designed using a 0.15-\n<inline-formula> <tex-math>$\\mu $ </tex-math></inline-formula>\n m Bipolar-CMOS-DMOS (BCD) process to achieve a conversion from 24 V to 1 V. It can support a load current range of 200 mA to 6 A, with each sub-converter operating at a frequency of 1-MHz. Post-layout simulations show a peak power efficiency of 90.07% under a 2-A current load, with an efficiency of 85% even at a load of 6-A.","PeriodicalId":13101,"journal":{"name":"IEEE Transactions on Circuits and Systems II: Express Briefs","volume":"72 1","pages":"308-312"},"PeriodicalIF":4.0000,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Transactions on Circuits and Systems II: Express Briefs","FirstCategoryId":"5","ListUrlMain":"https://ieeexplore.ieee.org/document/10685510/","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}

引用次数: 0

Abstract

This brief introduces a 24V-to-1V hybrid converter with low-voltage power switches. By incorporating three flying capacitors in series with a two-phase switched-inductor, the proposed converter effectively functions as a 4.8V-to-1V converter. Thus, a high-voltage design is realized with low-voltage transistors known for their excellent figure of merit. As a result, the hybrid converter achieves an effective duty cycle five times higher and a better conversion efficiency compared with a double step-down converter (DSD) and a double series-capacitor converter (DSCBC) under identical power switch sizes and working conditions. The circuit is designed using a 0.15-

$\mu $

m Bipolar-CMOS-DMOS (BCD) process to achieve a conversion from 24 V to 1 V. It can support a load current range of 200 mA to 6 A, with each sub-converter operating at a frequency of 1-MHz. Post-layout simulations show a peak power efficiency of 90.07% under a 2-A current load, with an efficiency of 85% even at a load of 6-A.

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

IEEE Transactions on Circuits and Systems II: Express Briefs 工程技术-工程：电子与电气

CiteScore

7.90

自引率

20.50%

发文量

883

审稿时长

3.0 months

期刊介绍： TCAS II publishes brief papers in the field specified by the theory, analysis, design, and practical implementations of circuits, and the application of circuit techniques to systems and to signal processing. Included is the whole spectrum from basic scientific theory to industrial applications. The field of interest covered includes: Circuits: Analog, Digital and Mixed Signal Circuits and Systems Nonlinear Circuits and Systems, Integrated Sensors, MEMS and Systems on Chip, Nanoscale Circuits and Systems, Optoelectronic Circuits and Systems, Power Electronics and Systems Software for Analog-and-Logic Circuits and Systems Control aspects of Circuits and Systems.