A Fully-Integrated Biofuel-Cell-Based Energy Harvester with 86% Peak Efficiency and 0.25V Minimum Input Voltage Using Source-Adaptive MPPT
- Resource Type
- Conference
- Authors
- Talkhooncheh, Arian Hashemi; Yu, You; Agarwal, Abhinav; Kuo, William; Chen, Kuan-Chang Xavier; Wang, Minwo; Hoskuldsdottir, Gudrun; Gao, Wei; Emami, Azita
- Source
- 2020 IEEE Custom Integrated Circuits Conference (CICC) Custom Integrated Circuits Conference (CICC), 2020 IEEE. :1-4 Mar, 2020
- Subject
- Components, Circuits, Devices and Systems
Engineering Profession
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Voltage control
Switches
Biofuels
Hysteresis
Power generation
Power demand
Energy Harvester
Biofuel Cell
Source-adaptive MPPT
DC-DC voltage converter
- Language
- ISSN
- 2152-3630
This paper presents a cold-starting energy harvester in 65nm CMOS with source degradation tracking and automatic MPPT. A power-efficient architecture is proposed to keep the internal circuitry operating at 0.4V while regulating the output voltage at 1V using switched-capacitor DC-DC converters and a hysteresis controller. Peak efficiency of 86% is achieved at 0.39V input voltage and $1.34\mu\mathrm{W}$ of output power with 220nW of internal average power consumption. Integrated operation with lactate biofuel cells is demonstrated.