%0 Journal Article
%T Low Cost, High Power Factor, Dimmable, Monolithic AC-Direct LED Driver with on-Chip Step-Dimmer for Outdoor Lighting Applications
%A Hanjung Song
%A Kilsoo Seo
%A Sanguk Nam
%A Van Ha Nguyen
%A Yongsu Park
%J International Journal of Engineering and Technology
%@ 1793-8236
%D 2016
%R 10.7763/IJET.2016.V8.924
%X Abstract¡ªIn this paper, we develop a monolithic AC LED driver IC which can drive and dim high voltage LED strings directly from the 220V/60Hz commercial AC power. The proposed AC LED driver delivers a best-in-class dimming performance via a simple concept with a step-dimmer, while maintaining a very PF by using a self-adapive power processing circuit. In order to verify the performance of the proposed scheme, a 4.4W, 8-string AC-directly-power LED driver was designed and simulated using 0.35um BCD Magnachip process technology. The simulated results show a PF > 0.99 with a THD < 7% under different dimming modes. The high level of integration and low component count result in a cost-effective solution which is especially suitable for use in outdoor lighting applications.
%U http://www.ijetch.org/index.php?m=content&c=index&a=show&catid=80&id=1073