Efficient Solar Power Management System for Self-Powered IoT Node

An efficient micro-scale solar power management architecture for self-powered Internet-of-Things node is presented in this paper. The proposed architecture avoids the linear regulator and presents a complete on-chip switched capacitor based power converter in order to achieve higher end-to-end effic...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems. I, Regular papers Regular papers, 2017-09, Vol.64 (9), p.2359-2369
Main Authors: Mondal, Saroj, Paily, Roy
Format: Article
Language:English
Subjects:
Capacitors
CMOS
Computer architecture
DC-DC converter
DC-DC power converters
Efficiency
Electronics industry
Energy conversion efficiency
energy processing
energy scavenging
Impedance
Integrated circuits
Internet of Things
Internet of Things (IoT)
maximum power point tracking
Microprocessors
photovoltaic cell
Photovoltaic cells
Power management
Solar cells
Solar energy
Switches
Switching converters
wireless sensor nodes
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Description
Summary:An efficient micro-scale solar power management architecture for self-powered Internet-of-Things node is presented in this paper. The proposed architecture avoids the linear regulator and presents a complete on-chip switched capacitor based power converter in order to achieve higher end-to-end efficiency. Unlike traditional architectures, where the harvested energy processes twice, the proposed architecture processes the harvested energy only once before it reaches to the load circuit, irrespective of the ambient conditions. The system efficiency has been improved by ~12% over the traditional architecture. The entire power management system has been designed using 0.18-μm CMOS technology node, and the circuit simulations demonstrate that the proposed architectural changes bring in a system efficiency of 82.4% under different light conditions. In addition to that, a hardware setup is created using commercially available ICs and photovoltaic cells, to validate that the proposed power management system is practically realizable.
ISSN:1549-8328
1558-0806
DOI:10.1109/TCSI.2017.2707566