High Dynamic Current Source for LED Light and Data Transmission Applications

Conference: PCIM Europe 2016 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05/10/2016 - 05/12/2016 at Nürnberg, Deutschland

Proceedings: PCIM Europe 2016

Pages: 8Language: englishTyp: PDF

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Authors:
Edelmoser, Karl H. (Institute of Electrical Drives and Machines, Technical University Vienna, Gusshausstr. 27-29, 1040 Wien, Austria)
Himmelstoss, Felix A. (University of Applied Science Technikum Wien, Hoechstaedtplatz 6, 1200 Wien, Austria)

Abstract:
In the field of high power LED and laser drive application there is a growing need for fast switching current sources with stable and reliable output levels as well as reproducible switching shapes in the range of several amps. An additional application is the hidden data transmission possibility with RGB-LEDs in combination with conventional lightning applications. The proposed approach discussed in this paper uses a combined structure of a DC-to-DC converter with some auxiliary switches to fulfill the given requirements: A wide input voltage range, and minimized output current ripple, which reduces the problems with EMC. The necessary switching frequencies of a suitable converter are derived.