A novel low-cost current-sharing method for automotive LED-lighting systems

Author

Thomas, Werner ; Pforr, Johannes

Author_Institution

Univ. of Appl. Sci. Ingolstadt, Ingolstadt, Germany

fYear

2009

Firstpage

1

Lastpage

10

Abstract

A novel low cost and passive current-sharing method for parallel connected LEDs is presented. The current-balancing concept is based on discontinuous inductor currents. An analysis has been performed and a prototype converter has been built and tested. The prototype converter drives 36 high-brightness LEDs consisting of six parallel strings with six high-brightness LEDs connected in series. The converter is designed for an automotive head-light system operating directly from the 14 V electrical automotive power net. Experimental results are in good correlation with theoretical predictions and demonstrate the good current-balancing performance.

Keywords

automotive electronics; driver circuits; light emitting diodes; power convertors; automotive LED-lighting system; automotive head-light system; current-sharing method; prototype converter drives; voltage 14 V; Automotive engineering; Circuits; Costs; LED lamps; Light emitting diodes; Performance analysis; Production; Prototypes; Resistors; Voltage; Automotive lighting systems; Converter Circuit; Switched-mode power supply;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Applications, 2009. EPE '09. 13th European Conference on

Conference_Location

Barcelona

Print_ISBN

978-1-4244-4432-8

Electronic_ISBN

978-90-75815-13-9

Type

conf

Filename

5278950