3.5-0.5V input, 1.0V output multi-mode power transformer for a supercapacitor power source with a peak efficiency of 70.4%

Xingyi Hua; Ramesh Harjani

doi:10.1109/CICC.2015.7338390

3.5-0.5V input, 1.0V output multi-mode power transformer for a supercapacitor power source with a peak efficiency of 70.4%

Xingyi Hua, Ramesh Harjani

Electrical and Computer Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

6 Scopus citations

Abstract

A multi-mode 3.5-0.5V input, 1.0V output power transformer based on switched-capacitor DC-DC converters is designed to extract 98% of the energy from a 80mF supercapac-itor, to power a periodically active RFID tag. Six converter modes (3 step-up and 3 step-down) are automatically selected depending on the input voltage. The system usage time is maximized by charging the supercapacitor to 3.5V while device breakdown is avoided via novel circuit techniques. The circuit fabricated in TSMC's 65nm GP process occupies an area of 0.48mm², supports a 3.3μA load current and operates at 2.0MHz. The gradually decreasing 3.5V to 0.5V supercapacitor voltage is transformed to a steady 1V output with a peak efficiency of 70.4%.

Original language	English (US)
Title of host publication	2015 IEEE Custom Integrated Circuits Conference, CICC 2015
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781479986828
DOIs	https://doi.org/10.1109/CICC.2015.7338390
State	Published - Nov 25 2015
Event	IEEE Custom Integrated Circuits Conference, CICC 2015 - San Jose, United States Duration: Sep 28 2015 → Sep 30 2015

Publication series

Name	Proceedings of the Custom Integrated Circuits Conference
Volume	2015-November
ISSN (Print)	0886-5930

Other

Other	IEEE Custom Integrated Circuits Conference, CICC 2015
Country/Territory	United States
City	San Jose
Period	9/28/15 → 9/30/15

Bibliographical note

Publisher Copyright:
© 2015 IEEE.

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10.1109/CICC.2015.7338390

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Cite this

Hua, X., & Harjani, R. (2015). 3.5-0.5V input, 1.0V output multi-mode power transformer for a supercapacitor power source with a peak efficiency of 70.4%. In 2015 IEEE Custom Integrated Circuits Conference, CICC 2015 Article 7338390 (Proceedings of the Custom Integrated Circuits Conference; Vol. 2015-November). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/CICC.2015.7338390

3.5-0.5V input, 1.0V output multi-mode power transformer for a supercapacitor power source with a peak efficiency of 70.4%. / Hua, Xingyi; Harjani, Ramesh.
2015 IEEE Custom Integrated Circuits Conference, CICC 2015. Institute of Electrical and Electronics Engineers Inc., 2015. 7338390 (Proceedings of the Custom Integrated Circuits Conference; Vol. 2015-November).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Hua, X & Harjani, R 2015, 3.5-0.5V input, 1.0V output multi-mode power transformer for a supercapacitor power source with a peak efficiency of 70.4%. in 2015 IEEE Custom Integrated Circuits Conference, CICC 2015., 7338390, Proceedings of the Custom Integrated Circuits Conference, vol. 2015-November, Institute of Electrical and Electronics Engineers Inc., IEEE Custom Integrated Circuits Conference, CICC 2015, San Jose, United States, 9/28/15. https://doi.org/10.1109/CICC.2015.7338390

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abstract = "A multi-mode 3.5-0.5V input, 1.0V output power transformer based on switched-capacitor DC-DC converters is designed to extract 98% of the energy from a 80mF supercapac-itor, to power a periodically active RFID tag. Six converter modes (3 step-up and 3 step-down) are automatically selected depending on the input voltage. The system usage time is maximized by charging the supercapacitor to 3.5V while device breakdown is avoided via novel circuit techniques. The circuit fabricated in TSMC's 65nm GP process occupies an area of 0.48mm2, supports a 3.3μA load current and operates at 2.0MHz. The gradually decreasing 3.5V to 0.5V supercapacitor voltage is transformed to a steady 1V output with a peak efficiency of 70.4%.",

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3.5-0.5V input, 1.0V output multi-mode power transformer for a supercapacitor power source with a peak efficiency of 70.4%

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