{"title":"3D LEGO-PoL: A 93.3% Efficient 48V-1.5V 450A Merged-Two-Stage Hybrid Switched-Capacitor Converter with 3D Vertical Coupled Inductors","authors":"J. Baek, Youssef Elasser, Minjie Chen","doi":"10.1109/APEC42165.2021.9487080","DOIUrl":null,"url":null,"abstract":"This paper presents a merged-two-stage hybrid switched-capacitor point-of-load converter with 3D-embedded coupled inductors, vertical power delivery, and LEGO-PoL architecture. By merging a switched-capacitor circuit with a multiphase buck circuit, the 3D LEGO-PoL converter offers reduced device stress and minimized magnetic size, and enables soft switching, soft charging, voltage balancing, and current sharing. A prototype converter with 3D embedded coupled inductors is designed to deliver power vertically from the motherboard to microprocessors with minimized 2D area. A 675 W, 48 V to 1.5 V/450 A hybrid converter with a peak efficiency of 93.3%, full load efficiency of 87.2%, current density of 0.57 A/mm2, and power density of 688 W/in3 was built and tested to verify the effectiveness of the hybrid converter architecture with 3D embedded coupled inductors and vertical power delivery.","PeriodicalId":7050,"journal":{"name":"2021 IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2021-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"5","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2021 IEEE Applied Power Electronics Conference and Exposition (APEC)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/APEC42165.2021.9487080","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 5
Abstract
This paper presents a merged-two-stage hybrid switched-capacitor point-of-load converter with 3D-embedded coupled inductors, vertical power delivery, and LEGO-PoL architecture. By merging a switched-capacitor circuit with a multiphase buck circuit, the 3D LEGO-PoL converter offers reduced device stress and minimized magnetic size, and enables soft switching, soft charging, voltage balancing, and current sharing. A prototype converter with 3D embedded coupled inductors is designed to deliver power vertically from the motherboard to microprocessors with minimized 2D area. A 675 W, 48 V to 1.5 V/450 A hybrid converter with a peak efficiency of 93.3%, full load efficiency of 87.2%, current density of 0.57 A/mm2, and power density of 688 W/in3 was built and tested to verify the effectiveness of the hybrid converter architecture with 3D embedded coupled inductors and vertical power delivery.
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