LED driver provides software-controlled intensity

Recent advances in operating efficiency have expanded the use of light emitting diodes (LED) from one of mere indicators to becoming driving forces in electronic lighting. Vendors in recent years have introduced many ICs for driving LEDs, but the problem of driving serial chains of LEDs has received...

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Bibliographic Details
Published in:EDN 2004-09, Vol.49 (20), p.86-86
Main Authors: Shahi, Neda, Starmark, Bjorn
Format: Magazinearticle
Language:English
Subjects:
Design engineering
Electric properties
Integrated circuits
Light emitting diodes
Product information
Software
Voltage
Online Access:Get full text
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Summary:Recent advances in operating efficiency have expanded the use of light emitting diodes (LED) from one of mere indicators to becoming driving forces in electronic lighting. Vendors in recent years have introduced many ICs for driving LEDs, but the problem of driving serial chains of LEDs has received less attention. One approach to that problem adapts a bias-supply IC for avalanche photodiodes to provide adjustable-current, software shutdown, and logic indication of open-circuit faults. The circuit also provides an output-voltage limit.
ISSN:0012-7515
2163-4084