Title :
A novel passive off-line light-emitting diode (LED) driver with long lifetime
Author :
Hui, Y.R. ; Li, S.N. ; Tao, X.H. ; Chen, W. ; Ng, W.M.
Author_Institution :
Center for Power Electron., City Univ. of Hong Kong, Hong Kong, China
Abstract :
This paper describes a patent-pending passive offline LED driver that has no semiconductor switches, electrolytic capacitors, auxiliary power supply and control board. It can provide a fairly smooth current from the ac mains to drive LED strings. The new circuit has the advantages of high input power factor, high energy efficiency and luminous efficacy, long lifetime, stable luminous output and high robustness against extreme weather conditions. In addition, over 90% of the driver material is recyclable, leading to reduction of electronic waste. It is particularly suitable public LED lighting systems such as road lighting systems. Experimental results based on a 50W system are included in the paper to confirm the validity of the proposal. Due to the circuit simplicity, an energy efficiency exceeding 93.6% has been achieved.
Keywords :
driver circuits; energy conservation; light emitting diodes; power factor; LED driver strings; LED lighting systems; auxiliary power supply; circuit simplicity; control board; driver material; electrolytic capacitors; electronic waste. reduction; energy efficiency; high input power factor; luminous efficacy; passive off-line light-emitting diode; power 50 W; road lighting systems; robustness; semiconductor switches; stable luminous output; Driver circuits; Energy efficiency; LED lamps; Light emitting diodes; Power capacitors; Power semiconductor switches; Power supplies; Reactive power; Robustness; Waste materials;
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.2010.5433609
