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An ultra-low-power CMOS supercapacitor storage unit for energy harvesting applications

Gogolou Vasiliki, Kozalakis Konstantinos, Koutroulis Eftychios, Doumenis Gregory, Siskos Stylianos

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URIhttp://purl.tuc.gr/dl/dias/101CBC08-1E21-4155-B122-27FF8B2BABD3-
Identifierhttps://doi.org/10.3390/electronics10172097-
Identifierhttps://www.mdpi.com/2079-9292/10/17/2097/htm-
Languageen-
Extent14 pagesen
TitleAn ultra-low-power CMOS supercapacitor storage unit for energy harvesting applicationsen
CreatorGogolou Vasilikien
CreatorKozalakis Konstantinosen
CreatorKoutroulis Eftychiosen
CreatorΚουτρουλης Ευτυχιοςel
CreatorDoumenis Gregoryen
CreatorSiskos Stylianosen
PublisherMDPIen
Content SummaryThis work presents an ultra-low-power CMOS supercapacitor storage unit suitable for a plethora of low-power autonomous applications. The proposed unit exploits the unregulated voltage output of harvesting circuits (i.e., DC-DC converters) and redirects the power to the storage elements and the working loads. Being able to adapt to the input energy conditions and the connected loads’ supply demands offers extended survival to the system with the self-startup operation and voltage regulation. A low-complexity control unit is implemented which is composed of power switches, comparators and logic gates and is able to supervise two supercapacitors, a small and a larger one, as well as a backup battery. Two separate power outputs are offered for external load connection which can be controlled by a separate unit (e.g., microcontroller). Furthermore, user-controlled parameters such as charging and discharging supercapacitor voltage thresholds, provide increased versatility to the system. The storage unit was designed and fabricated in a 0.18 um standard CMOS process and operates with ultra-low current consumption of 432 nA at 2.3 V. The experimental results validate the proper operation of the overall structure. en
Type of ItemPeer-Reviewed Journal Publicationen
Type of ItemΔημοσίευση σε Περιοδικό με Κριτέςel
Licensehttp://creativecommons.org/licenses/by/4.0/en
Date of Item2022-10-06-
Date of Publication2021-
SubjectEnergy harvestingen
SubjectOn-chip integrationen
SubjectPower managementen
SubjectSupercapacitoren
SubjectStorage uniten
Bibliographic CitationV. Gogolou, K. Kozalakis, E. Koutroulis, G. Doumenis, and S. Siskos, “An ultra-low-power CMOS supercapacitor storage unit for energy harvesting applications,” Electronics, vol. 10, no. 17, Aug. 2021, doi: 10.3390/electronics10172097.en

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