Title :
A study on the power LEDs drive circuit design with asymmetrical half-bridge resonant converter
Author :
Kim, Cherl-Jin ; Kim, Eung-Seok ; Shin, Heung-Kyo
Author_Institution :
Dept. of Electr. Eng., Halla Univ., Wonju, South Korea
Abstract :
Recently white light-emitting diode (LED) has very attractive attention as a backlight for LCD display and lighting sources. The series-parallel connected LEDs must be driven from a current source because their forward voltage varies, as a result the brightness changes depending on the forward current increases. In this paper, the suitable LED driving system is proposed for LED lighting sources. The driving system is consist of high power factor correction circuit and isolated constant current DC-DC converter with high efficiency.
Keywords :
DC-DC power convertors; LED displays; lighting; power factor correction; resonant power convertors; LCD display; LED lighting sources; asymmetrical half-bridge resonant converter; isolated constant current DC-DC converter; light-emitting diode; power LED drive circuit design; power factor correction circuit; Brightness; Chromium; Circuit synthesis; Inductance; LED lamps; Light emitting diodes; Magnetic resonance; RLC circuits; Switching converters; Voltage;
Conference_Titel :
Electrical Machines and Systems, 2009. ICEMS 2009. International Conference on
Conference_Location :
Tokyo
Print_ISBN :
978-1-4244-5177-7
Electronic_ISBN :
978-4-88686-067-5
DOI :
10.1109/ICEMS.2009.5382947
