Test & Measurement

Devices Now Offered in 14 Narrow Color Bins, With Selection Type of Four Adjacent Color Groups Available

2nd September 2011
ES Admin

To meet the need for color homogeneity in a wide variety of lighting applications, Vishay Intertechnology, Inc today announced that it has expanded the color binning and ordering options for its VLMW41xx series of sapphire-based, cool white SMD LEDs in the PLCC-2 package. The devices are now available in 14 different color bins with very narrow chromaticity coordinate groups according to CIE1931. In addition, Vishay’s customers can now order LEDs comprised of four adjacent color bins.

Design engineers need very 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 enables designers to 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 a highly efficient InGaN technology, the devices offer a ±60° angle of half-intensity, an extremely high luminous intensity ranging from 180 mcd to 450 mcd, and a typical color temperature of 5500 K, 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 4 weeks, well beyond the typical PLCC-2 rating and one less worry for manufacturers.

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 2 kV, in accordance with JESD22-A114-B, are lead (Pb)-free and RoHS compliant.

Available in 8-mm tape, samples of the VLMW41xx high-intensity SMD LEDs are available now. Production quantities are available now, with lead times of six to eight weeks for larger orders.

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