@inproceedings{bfd2ba290bad4b6cb93f4a3ef7078777,
title = "LEGO-Boost: A Merged-Two-Stage Resonant-Switched-Capacitor Converter with High Voltage Conversion Ratio",
abstract = "This paper presents a family of merged-two-stage resonant-switched-capacitor boost converters with a Linear Extendable Group Operated Boost (LEGO-Boost) architecture. In the LEGO-Boost architecture, multiple resonant voltage doubler units are connected in parallel to interface with a high current input source; multiple switched-capacitor units are connected in series to interface with a high voltage output load. The operation of the resonant voltage doubler units and the switched-capacitor units are merged to create mutual advantages: the resonant voltage doubler units are used as current sources to soft-charge the series stacked switched-capacitor units and maintain voltage balancing; the stacked switched-capacitor units are used to multiply the voltage without charge sharing loss and switching loss (achieving soft-switching and soft-charging). All active switches in the LEGO-Boost architecture are configured as ground referenced half-bridge circuits. It offers advantages of high reliability, high scalability and low cost for applications such as grid-interface photovoltaic and fuel cell systems. The effectiveness of the LEGO-Boost architecture is verified by a 20 V-to-240 V 535 W (1:12 voltage conversion ratio) prototype with 94.2% peak efficiency and over 215 W/in3 power density.",
keywords = "fuel cell, photovoltaic, resonant converter, soft-charging, soft-switching, switched-capacitor converter",
author = "Yenan Chen and Jaeil Baek and Minjie Chen",
note = "Publisher Copyright: {\textcopyright} 2020 IEEE.; 35th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2020 ; Conference date: 15-03-2020 Through 19-03-2020",
year = "2020",
month = mar,
doi = "10.1109/APEC39645.2020.9124570",
language = "English (US)",
series = "Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "48--55",
booktitle = "APEC 2020 - 35th Annual IEEE Applied Power Electronics Conference and Exposition",
address = "United States",
}