TY - GEN
T1 - A 96.5%-Power-Efficiency Hybrid Buck-Boost Photovoltaic Energy Harvester Employing Adaptive FOCV MPPT Control for >98% MPPT Efficiency Across a 10,000× Dynamic Range
AU - Hung, Phan Dang
AU - Shin, Hongseok
AU - Park, Yechan
AU - Hoang, Nguyen Kim
AU - Cho, Donghee
AU - Ha, Sohmyung
AU - Kim, Chul
AU - Je, Minkyu
N1 - Funding Information:
This work was supported by the Ministry of Science and ICT, Korea.
Publisher Copyright:
© 2022 IEEE.
PY - 2022
Y1 - 2022
N2 - We present a photovoltaic (PV) energy harvesting (EH) system achieving both high maximum-power-point-tracking efficiency (MPPT) and high power-conversion efficiency (CONV) in an ultra-wide input power (PIN) range. Instead of a complex and power-hungry hybrid MPPT, an MPPT based on an adaptive fractional open-circuit voltage (FOCV) method is used to tune the fraction k based on PIN with little power overhead. Also, a hybrid topology is modified to work as a buck-boost converter to maintain high CONV at low PIN by combining three different control techniques. Zero-current-detection (ZCD) is performed with actively changing the tuning resolution to reduce control bit size and response time.
AB - We present a photovoltaic (PV) energy harvesting (EH) system achieving both high maximum-power-point-tracking efficiency (MPPT) and high power-conversion efficiency (CONV) in an ultra-wide input power (PIN) range. Instead of a complex and power-hungry hybrid MPPT, an MPPT based on an adaptive fractional open-circuit voltage (FOCV) method is used to tune the fraction k based on PIN with little power overhead. Also, a hybrid topology is modified to work as a buck-boost converter to maintain high CONV at low PIN by combining three different control techniques. Zero-current-detection (ZCD) is performed with actively changing the tuning resolution to reduce control bit size and response time.
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U2 - 10.1109/VLSITechnologyandCir46769.2022.9830494
DO - 10.1109/VLSITechnologyandCir46769.2022.9830494
M3 - Conference contribution
AN - SCOPUS:85135219011
T3 - Digest of Technical Papers - Symposium on VLSI Technology
SP - 200
EP - 201
BT - 2022 IEEE Symposium on VLSI Technology and Circuits, VLSI Technology and Circuits 2022
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2022 IEEE Symposium on VLSI Technology and Circuits, VLSI Technology and Circuits 2022
Y2 - 12 June 2022 through 17 June 2022
ER -