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

fYear

2011

fDate

11-15 Sept. 2011

Firstpage

918

Lastpage

923

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Conference (COBEP), 2011 Brazilian

Conference_Location

Praiamar

ISSN

2175-8603

Print_ISBN

978-1-4577-1644-7

Electronic_ISBN

2175-8603

Type

conf

DOI

10.1109/COBEP.2011.6085319

Filename

6085319