TY - GEN
T1 - 30.2 A 93.2%-Efficiency Multi-Input Bipolar Energy Harvester with 17.9× MPPT Loss Reduction
AU - Yang, Zhen Yu
AU - Chen, An
AU - Chen, Cheng Wen
AU - Hung, Wei Chieh
AU - Chen, Ke Horng
AU - Zheng, Kuo Lin
AU - Lin, Ying Hsi
AU - Lin, Shian Ru
AU - Tsai, Tsung Yen
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - Today's multi-input energy harvesters need to accommodate different energies, such as sub-1mu W from radio frequency (RF), tens of mu W from thermal energy generators (TEG), and hundreds of muW from photovoltaic (PV). The generic harvesting controller in [1] cannot be used for ultra-low energy sources due to the increased quiescent current (I Q). Although an ultra-low energy source can be obtained by the Battery-TEG Pile-up Buck (BTPB) supply [2] (top left of Fig. 30.2.1), the increased peak inductor current causes a larger input source voltage ripple, Delta VSRC. If VBAT=1.2V and VSRC=0.5V from TEG, then Delta VSRC will increase to 28.8mV (equal to 11.5% of VOC/2, where VOC is the open circuit voltage), as shown in the middle of Fig. 30.2.1, thereby increasing power loss and degrading maximum power point tracking (MPPT) efficiency. Also, energy cannot be harvested in [2] when VStextRC is negative due to the bipolar TEG. A bulky transformer is used in [3] to obtain a bipolar VStextRC, and yet, resulting in a low power density that is not suitable for Internet of Things (loT) applications.
AB - Today's multi-input energy harvesters need to accommodate different energies, such as sub-1mu W from radio frequency (RF), tens of mu W from thermal energy generators (TEG), and hundreds of muW from photovoltaic (PV). The generic harvesting controller in [1] cannot be used for ultra-low energy sources due to the increased quiescent current (I Q). Although an ultra-low energy source can be obtained by the Battery-TEG Pile-up Buck (BTPB) supply [2] (top left of Fig. 30.2.1), the increased peak inductor current causes a larger input source voltage ripple, Delta VSRC. If VBAT=1.2V and VSRC=0.5V from TEG, then Delta VSRC will increase to 28.8mV (equal to 11.5% of VOC/2, where VOC is the open circuit voltage), as shown in the middle of Fig. 30.2.1, thereby increasing power loss and degrading maximum power point tracking (MPPT) efficiency. Also, energy cannot be harvested in [2] when VStextRC is negative due to the bipolar TEG. A bulky transformer is used in [3] to obtain a bipolar VStextRC, and yet, resulting in a low power density that is not suitable for Internet of Things (loT) applications.
UR - http://www.scopus.com/inward/record.url?scp=85151684804&partnerID=8YFLogxK
U2 - 10.1109/ISSCC42615.2023.10067272
DO - 10.1109/ISSCC42615.2023.10067272
M3 - Conference contribution
AN - SCOPUS:85151684804
T3 - Digest of Technical Papers - IEEE International Solid-State Circuits Conference
SP - 440
EP - 442
BT - 2023 IEEE International Solid-State Circuits Conference, ISSCC 2023
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2023 IEEE International Solid-State Circuits Conference, ISSCC 2023
Y2 - 19 February 2023 through 23 February 2023
ER -
