Synthesis and design of a fully integrated multi-topology switched capacitor DC-DC converter with gearbox control

Jeppe Gaardsted Davidsen, Yoni Yosef-Hay, Dennis Øland Larsen, Ivan Harald Holger Jørgensen

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Abstract

This paper discusses a methodology of minimizing the amount of switches in a multi-topology fully integrated switched capacitor dc-dc converter powered by a super capacitor for energy harvesting purposes. The design of a simple controlling circuit for the multi-topology power stage using a gearbox approach is presented with all the required circuits. The converter is able to generate a output voltage of 1.2 V from a 470 mF capacitor charged to 3 V down to 1.4 V. The output voltage is regulated with a ripple voltage below 7 mV. The controlling circuit including buffers with ideal comparators has a power consumption of 129 μW, the average efficiency is 67% and the peak efficiency of the converter is 81%.
Original languageEnglish
Title of host publicationProceedings of Nordic Circuits and Systems Conference (NORCAS): NORCHIP and International Symposium of System-on-Chip (SoC), 2017 IEEE
Number of pages6
PublisherIEEE
Publication date2017
Pages1-6
ISBN (Print)978-1-5386-2844-7
DOIs
Publication statusPublished - 2017
EventNordic Circuits and Systems Conference (NORCAS): NORCHIP and International Symposium of System-on-Chip (SoC) - Linköping Konsert & Kongress, Linköping, Sweden
Duration: 23 Oct 201725 Oct 2017
http://ieee-cas.org/conference/2017-norcas

Conference

ConferenceNordic Circuits and Systems Conference (NORCAS): NORCHIP and International Symposium of System-on-Chip (SoC)
LocationLinköping Konsert & Kongress
CountrySweden
CityLinköping
Period23/10/201725/10/2017
Internet address

Cite this

Davidsen, J. G., Yosef-Hay, Y., Larsen, D. Ø., & Jørgensen, I. H. H. (2017). Synthesis and design of a fully integrated multi-topology switched capacitor DC-DC converter with gearbox control. In Proceedings of Nordic Circuits and Systems Conference (NORCAS): NORCHIP and International Symposium of System-on-Chip (SoC), 2017 IEEE (pp. 1-6). IEEE. https://doi.org/10.1109/NORCHIP.2017.8124994