TY - JOUR
T1 - A 90.2% peak efficiency multi-input single-inductor multi-output energy harvesting interface with double-conversion rejection technique and buck-based dual-conversion mode
AU - Kim, Hyunjin
AU - Maeng, Junyoung
AU - Park, Inho
AU - Jeon, Jinwoo
AU - Lim, Dongju
AU - Kim, Chulwoo
N1 - Funding Information:
Manuscript received March 15, 2020; revised July 28, 2020; accepted September 13, 2020. Date of publication October 5, 2020; date of current version February 24, 2021. This article was approved by Guest Editor Wing-Hung Ki. This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Korea Government (MSIT) 2019R1A2B5B03100756. The chip fabrication and EDA tool were supported by the IC Design Education Center (IDEC), South Korea. (Corresponding author: Chulwoo Kim.) The authors are with the Department of Electrical Engineering, Korea University, Seoul 02841, South Korea (e-mail: ckim@korea.ac.kr).
Publisher Copyright:
© 1966-2012 IEEE.
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/3
Y1 - 2021/3
N2 - This article presents a multi-input single-inductor multi-output energy-harvesting interface that extracts power from three independent sources and regulates three output voltages. The converter employs the proposed double-conversion rejection technique to reduce the double-converted power by up to 81.8% under the light-load condition and operates in various power conversion modes, including the proposed buck-based dual-conversion mode, to improve the power conversion efficiency and maximum load power. The proposed adaptive peak inductor current controller determines the inductor charging period, and the proposed digitally controlled zero-current detector detects the optimum zero-current point according to the operating mode. The proposed converter achieves a peak end-to-end efficiency of 90.2% and a maximum output power of 24 mW, indicating the improvements of approximately 7.52% and 1.85 times, respectively, compared with those of conventional buck-boost converters.
AB - This article presents a multi-input single-inductor multi-output energy-harvesting interface that extracts power from three independent sources and regulates three output voltages. The converter employs the proposed double-conversion rejection technique to reduce the double-converted power by up to 81.8% under the light-load condition and operates in various power conversion modes, including the proposed buck-based dual-conversion mode, to improve the power conversion efficiency and maximum load power. The proposed adaptive peak inductor current controller determines the inductor charging period, and the proposed digitally controlled zero-current detector detects the optimum zero-current point according to the operating mode. The proposed converter achieves a peak end-to-end efficiency of 90.2% and a maximum output power of 24 mW, indicating the improvements of approximately 7.52% and 1.85 times, respectively, compared with those of conventional buck-boost converters.
KW - Buck-based dual-conversion (BBDC)
KW - dc-dc converter
KW - double-conversion rejection technique (DCRT)
KW - energy harvesting (EH)
KW - Internet of Things
KW - multiple inputs
KW - multiple outputs
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U2 - 10.1109/JSSC.2020.3025722
DO - 10.1109/JSSC.2020.3025722
M3 - Article
AN - SCOPUS:85101840190
VL - 56
SP - 961
EP - 971
JO - IEEE Journal of Solid-State Circuits
JF - IEEE Journal of Solid-State Circuits
SN - 0018-9200
IS - 3
M1 - 9212601
ER -