Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/145232
Title: An 88% efficiency 0.1–300-μW energy harvesting system with 3-D MPPT using switch width modulation for IoT smart nodes
Authors: Rawy, Karim
Yoo, Taegeun
Kim, Tony Tae-Hyoung
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2018
Source: Rawy, K., Yoo, T., & Kim, T. T.-H. (2018). An 88% efficiency 0.1–300-μW energy harvesting system with 3-D MPPT using switch width modulation for IoT smart nodes. IEEE Journal of Solid-State Circuits, 53(10), 2751- 2762. doi:10.1109/JSSC.2018.2833278
Journal: IEEE Journal of Solid-State Circuits
Abstract: This paper presents a novel 3-D maximum power point tracking (3-D MPPT) system for energy harvesting systems (EHS) within Internet of Things (IoT) smart nodes. The proposed 3-D MPPT utilizes a switch width modulation (SWM) technique for improving power efficiency (PE) at idle (<;1 μA) and heavy ( 300 μA) load modes. The SWM eliminates the gate driver/conduction loss tradeoff in a reconfigurable switched capacitor charge pump (SCCP). The proposed SWM technique modulates the SCCP switch resistance in proportion to the load condition, input voltage, and Vgs applied. A cold startup technique is incorporated in the proposed EHS with an energy-aware algorithm for input harvester select purpose. The fabricated test chip in 65-nm CMOS technology can harvest solar and thermal energy from 0.35 V and provides a regulated output voltage at 1 V with the peak efficiency of 88% at 200 μW and PE 60% at 100 nW.
URI: https://hdl.handle.net/10356/145232
ISSN: 1558-173X
DOI: 10.1109/JSSC.2018.2833278
Rights: © 2018 Institute of Electrical and Electronics Engineers (IEEE). All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:EEE Journal Articles

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