Title :
Improving current regulation for offline LED driver
Author_Institution :
STMicroelectronics, Schaumburg, IL, USA
Abstract :
A buck converter is a very common choice for non-isolated offline LED applications, using peak current regulation. The problem for peak current regulation is that the average current of the LED string will vary with different numbers of LEDs. This paper presents two simple and cost effective ways to compensate the average current variation without losing the simplicity of peak current regulation.
Keywords :
electric current control; light emitting diodes; power convertors; buck converter; offline LED driver; peak current regulation; Buck converters; Costs; Current control; Equations; Feedback circuits; Inductors; Light emitting diodes; MOSFET circuits; Testing; Voltage control;
Conference_Titel :
Applied Power Electronics Conference and Exposition (APEC), 2010 Twenty-Fifth Annual IEEE
Conference_Location :
Palm Springs, CA
Print_ISBN :
978-1-4244-4782-4
Electronic_ISBN :
1048-2334
DOI :
10.1109/APEC.2010.5433610
