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A 0.48mm² 5µW-10mW Indoor-Outdoor PV Energy-Harvesting Management Unit in a 65nm SoC based on a Single Bidirectional Multi-Gain/Multi-Mode Switched-Cap Converter with Supercap Storage

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Bol, David [UCL] Boufouss, El Hafed [nSilition, Belgium] Flandre, Denis [UCL] De Vos, Julien [e-peas, Belgium]

We propose an energy-harvesting management unit to interface a PV harvester with a storage supercapacitor while generating a 1V regulated supply VREG. Direct connection between stacked PV cells and VREG allows virtual 100% conversion efficiency between the harvester and the supplied circuits, while the use of a single bidirectional switched capacitor DC/DC converter between VREG and the supercap allows 0.48mm2 area in a 65nm IoT vision SoC with a single external filtering capacitor. To cope with the 0-3V charge dependent supercap voltage range and the wide 5μW-10mW harvester/load power range, the converter features adaptive selection between multiple voltage gains and power modes.

Document type Communication à un colloque (Conference Paper) – Présentation orale avec comité de sélection
Access type Accès restreint
Publication date 2015
Language Anglais
Conference "41th European Solid-State Circuits Conference (ESSCIRC 2015)", Graz (Autriche) (du 14/09/2015 au 18/09/2015)
Peer reviewed yes
Host document "Proceedings of ESSCIRC 2015"- 4
Publisher IEEE
Publication status Publié
Affiliation UCL - SST/ICTM/ELEN - Pôle en ingénierie électrique
Keywords PV Energy-Harvesting ; Switched-Cap Converter
Links
Bibliographic reference Bol, David ; Boufouss, El Hafed ; Flandre, Denis ; De Vos, Julien. A 0.48mm² 5µW-10mW Indoor-Outdoor PV Energy-Harvesting Management Unit in a 65nm SoC based on a Single Bidirectional Multi-Gain/Multi-Mode Switched-Cap Converter with Supercap Storage.41th European Solid-State Circuits Conference (ESSCIRC 2015) (Graz (Autriche), du 14/09/2015 au 18/09/2015). In: Proceedings of ESSCIRC 2015, IEEE2015, p.4
Permanent URL http://hdl.handle.net/2078.1/164922