A 1.2A 2MHz tri-mode buck-boost LED driver with feed-forward duty cycle correction

Sarvesh Bang, Damian Swank, Arun Rao, William McIntyre, Qadeer Khan, Pavan Kumar Hanumolu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A flash LED Buck-Boost driver employs a dual duty cycle control and feed-forward duty cycle correction to achieve high efficiency over the entire Li-On battery voltage range of 3.0 to 5.2V. Fabricated in a 0.5μm CMOS process, the converter uses an external 1μH inductor and a 10μF capacitor and operates at 2MHz switching frequency. The measured peak efficiency is 83% and 87% at 1.2A and 0.6A LED currents, respectively. This achieved efficiency represents an improvement of more than 10% over conventional approaches.

Original languageEnglish (US)
Title of host publicationIEEE Custom Integrated Circuits Conference 2010, CICC 2010
DOIs
StatePublished - Dec 13 2010
Externally publishedYes
Event32nd Annual Custom Integrated Circuits Conference - The Showcase for Circuit Design in the Heart of Silicon Valley, CICC 2010 - San Jose, CA, United States
Duration: Sep 19 2010Sep 22 2010

Publication series

NameProceedings of the Custom Integrated Circuits Conference
ISSN (Print)0886-5930

Other

Other32nd Annual Custom Integrated Circuits Conference - The Showcase for Circuit Design in the Heart of Silicon Valley, CICC 2010
CountryUnited States
CitySan Jose, CA
Period9/19/109/22/10

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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    Bang, S., Swank, D., Rao, A., McIntyre, W., Khan, Q., & Hanumolu, P. K. (2010). A 1.2A 2MHz tri-mode buck-boost LED driver with feed-forward duty cycle correction. In IEEE Custom Integrated Circuits Conference 2010, CICC 2010 [5617443] (Proceedings of the Custom Integrated Circuits Conference). https://doi.org/10.1109/CICC.2010.5617443