Title :
A LED driver with switched capacitor
Author :
dos Santos Filho, Esio Eloi ; Antunes, F.L.M. ; Miranda, Pedro H. A. ; Sa, Edilson M.
Author_Institution :
Group of Energy Process. & Control - GPEC, Univ. Fed. of Ceara - UFC, Fortaleza, Brazil
Abstract :
The paper proposes a switched-capacitor converter fed at 24 V to drive power light emitting diodes (LEDs). In contrast to conventional constant dc current drivers, the current pulse is provided by this switched-capacitor. In the present driver, the capacitor is charged and discharged through the output and the current flow direction is controlled by switches. Based on the charge control analysis, the effects of switching devices on the proposed converter are discriminated and evaluated. A 5 W converter prototype has been implemented. The experimental results demonstrated the technical feasibility of the proposed converter for LEDs.
Keywords :
driver circuits; light emitting diodes; power convertors; LED converter; LED driver; capacitor charging; capacitor discharging; charge control analysis; constant DC current drivers; converter prototype; current flow direction; current pulse; power 5 W; power LED; power light emitting diodes; switched-capacitor converter; switching devices; technical feasibility; voltage 24 V; Capacitance; Capacitors; Inductors; Light emitting diodes; RLC circuits; Switches; Switching frequency;
Conference_Titel :
Industry Applications (INDUSCON), 2012 10th IEEE/IAS International Conference on
Conference_Location :
Fortaleza
Print_ISBN :
978-1-4673-2412-0
DOI :
10.1109/INDUSCON.2012.6453637
