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Optoelectronics/Displays??

Vishay expands color binning for VLMW41XX series

Posted: 23 Aug 2011 ?? ?Print Version ?Bookmark and Share

Keywords:surface mount? white LED? color bins?

Vishay Intertechnology Inc. has expanded the color binning and ordering options for its VLMW41XX series of sapphire-based, cool white SMD LEDs that come PLCC-2 package. The devices are available in 14 different color bins with very narrow chromaticity coordinate groups according to CIE1931. Vishay customers can also order LEDs comprised of four adjacent color bins.

Design engineers need uniform color temperature when designing with white LEDs. Each LED should be nearly identical in color and intensity. By offering more narrow color bins and allowing customers to order four adjacent color groups, Vishay's VLMW41XX series helps designers eliminate color differences in applications including backlighting in automotive dashboards and switches; indicators and backlighting in telecommunications systems, audio and video equipment, white goods, and office equipment; and flat backlighting for LCDs, switches, and symbols in general use.

Built on an InGaN technology, the devices offer a 60 angle of half-intensity, an high luminous intensity ranging from 180C450mcd, and a typical color temperature of 5500K, cool white. The VLMW41xx devices are qualified according to AEC-Q101 for automotive applications. They have a moisture sensitivity level of 2a resulting in a floor life of four weeks, well beyond the typical PLCC-2 rating.

The package for the series is the EIA- and ICE-standard PLCC-2, which consists of a lead frame embedded in a white thermoplast. The reflector inside the package is filled with a mixture of epoxy and TAG phosphor. The TAG phosphor converts the blue emission partially to yellow, which mixes with the remaining blue to produce white. The LEDs feature an ESD-withstand voltage up to 2kV, in accordance with JESD22-A114-B, and are lead (Pb)-free and RoHS compliant.

Available in 8mm tape, samples of the VLMW41XX high-intensity SMD LEDs are available now. Production quantities are available, with lead times of six to eight weeks for larger orders.





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