Transient current regulation using a single DC-DC converter for high-efficiency RGB LEDs

Jacob Day, Donald Y.C. Lie, Jose V. Santos

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

2 Scopus citations

Abstract

This paper presents a dual-current regulating solution for a 3W light-emitting diode (LED) driver. This is useful for systems that use a single DC-DC converter driving multiple LEDs (e.g., interleaving red, green, and blue LEDs) to generate the full color range. When switching from blue to red, variations in LED forward voltage will cause a transient current spike of 1.5A for a desired steady state current of 300mA. Utilization of our work's dual current regulation reduces the transient current spike to as little as 10% overshoot of the desired steady state current, which has not been accomplished in previous works to the authors' knowledge. This regulation technique requires no extra control circuitry with minimal added design complexity, and only draws additional power when it is in use at LED transitions, allowing the system to operate at above 90% efficiency as suggested by SPICE simulations.

Original languageEnglish
Title of host publication54th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2011
DOIs
StatePublished - 2011
Event54th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2011 - Seoul, Korea, Republic of
Duration: Aug 7 2011Aug 10 2011

Publication series

NameMidwest Symposium on Circuits and Systems
ISSN (Print)1548-3746

Conference

Conference54th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2011
CountryKorea, Republic of
CitySeoul
Period08/7/1108/10/11

Keywords

  • DC-DC converter
  • LED driver
  • dual-current regulation
  • transient current regulation

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    Day, J., Lie, D. Y. C., & Santos, J. V. (2011). Transient current regulation using a single DC-DC converter for high-efficiency RGB LEDs. In 54th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2011 [6026345] (Midwest Symposium on Circuits and Systems). https://doi.org/10.1109/MWSCAS.2011.6026345