Title :
Transition-mode dimmable LED driver for illumination applications
Author_Institution :
Dept. of Electromech. Eng., Univ. of Macau, Macau, China
Abstract :
A transition-mode (TM) dimmable high brightness light-emitting-diode (LED) driver for general and residential illumination applications is presented. An improved pulse-width modulation dimming technique utilizing a low cost micro-controller is studied and implemented with a current-regulated LED drive. Under universal input voltage operation, high power factor and high efficiency can be achieved by a coupled inductor flyback converter, regulated by a TM power-factor-correction controller. The operation principles of the proposed LED driver will be discussed and evaluated. A laboratory prototype is also designed and tested for verification.
Keywords :
driver circuits; light emitting diodes; lighting; microcontrollers; power convertors; power factor correction; TM power-factor-correction controller; coupled inductor flyback converter; current-regulated LED drive; high power factor; light-emitting-diode driver; low cost microcontroller; pulse-width modulation dimming technique; residential illumination; transition-mode dimmable LED driver; universal input voltage operation; Brightness; Costs; Inductors; Laboratories; Light emitting diodes; Lighting; Pulse modulation; Reactive power; Space vector pulse width modulation; Voltage control; Current-regulated; LED drives; PWM dimming; transition-mode;
Conference_Titel :
Power Electronics Conference (IPEC), 2010 International
Conference_Location :
Sapporo
Print_ISBN :
978-1-4244-5394-8
DOI :
10.1109/IPEC.2010.5542218
