A 1.2A buck-boost LED driver with 13% efficiency improvement using error-averaged SenseFET-based current sensing

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

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

Abstract

High-current LED drivers suffer from a significant efficiency loss due to the presence of a current regulation element (CRE) in series with the LED. In a conventional driver, either a series current source [1] or a sense resistor [2, 3] acts as a CRE to regulate the LED current (ILED). In this paper, we seek to improve the efficiency by eliminating the series CRE. To this end, we employ a highly accurate current sensing scheme to directly regulate I LED and achieve more than 13% efficiency improvement.

Original languageEnglish (US)
Title of host publication2011 IEEE International Solid-State Circuits Conference - Digest of Technical Papers, ISSCC 2011
Pages238-239
Number of pages2
DOIs
StatePublished - May 12 2011
Externally publishedYes
Event2011 IEEE International Solid-State Circuits Conference, ISSCC 2011 - San Francisco, CA, United States
Duration: Feb 20 2011Feb 24 2011

Publication series

NameDigest of Technical Papers - IEEE International Solid-State Circuits Conference
ISSN (Print)0193-6530

Other

Other2011 IEEE International Solid-State Circuits Conference, ISSCC 2011
CountryUnited States
CitySan Francisco, CA
Period2/20/112/24/11

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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