Title :
Single Stage Offline LED Driver
Author_Institution :
STMicroelectronics, Schaumburg, IL
Abstract :
A non-isolated soft-switched high power factor offline LED driver is introduced in the paper. The buck-boost converter is chosen for this application due to its simplicity and low cost. The converter operates with constant peak current for constant power control, and in transition mode (boundary mode between CCM and DCM) to achieve soft switching. High power factor is achieved by reshaping the peak current nearby the zero crossing of input AC line.
Keywords :
power convertors; power factor; buck-boost converter; constant peak current; constant power control; nonisolated soft-switched high power factor offline LED driver; single stage offline LED driver; soft switching; Circuit synthesis; Costs; Coupling circuits; Driver circuits; Inductors; LED lamps; Light emitting diodes; Reactive power; US Department of Energy; Voltage; LED driver; buck-boost converter; single stage; soft-switching;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2009. APEC 2009. Twenty-Fourth Annual IEEE
Conference_Location :
Washington, DC
Print_ISBN :
978-1-4244-2811-3
Electronic_ISBN :
1048-2334
DOI :
10.1109/APEC.2009.4802716
