Title :
A switched-capacitor driver for power LEDs
Author :
Miranda, Pedro H A ; Sá, Edilson Mineiro, Jr. ; De Oliveira, Antonio V L ; dos Santos Fo, E.E. ; Antunes, Fernando L M
Author_Institution :
Fed. Inst. Educ., Sci. & Technol. of Ceara, Sobral, Brazil
Abstract :
This paper proposes a switched-capacitor converter to drive power light emitting diodes (LEDs). In contrast to conventional constant dc current drivers, the current pulse is provided by this switched-capacitor LED driver. In the present driver, the capacitor is charged and discharged through of the output circuit and the current flow direction is controlled by switch. Based on the charge control analysis, the effects of switching devices on the proposed converter are discriminated and evaluated. The experimental results demonstrated the technical feasibility of using the proposed converter for LEDs.
Keywords :
driver circuits; light emitting diodes; switched capacitor networks; switching convertors; charge control analysis; constant dc current driver; current flow direction; current pulse; power LED; power light emitting diode; switched-capacitor LED driver; switched-capacitor converter; Capacitance; Capacitors; Inductance; Light emitting diodes; Switches; Switching circuits; LED; Soft-switching; Switch-Capacitor;
Conference_Titel :
Power Electronics Conference (COBEP), 2011 Brazilian
Conference_Location :
Praiamar
Print_ISBN :
978-1-4577-1644-7
Electronic_ISBN :
2175-8603
DOI :
10.1109/COBEP.2011.6085319
