Opto-Electronics


Sapphire-based, high-intensity white SMD LEDs

21 February 2007 Opto-Electronics

To meet the increasing demand for white SMD LEDs, Vishay has released a new series of sapphire-based, high-intensity white SMD LEDs. The VLMW41XX series of SMD LEDs feature highly-efficient InGaN technology, intended for illumination applications such as for backlighting in automotive dashboards, switches and telecoms systems, and for LCDs, etc. The devices offer a 60° angle of half-intensity, an extremely high luminous intensity ranging from 112 mcd to 355 mcd, and a typical colour temperature of 5500 K. The package for the new 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. These LEDs feature an ESD-withstand voltage up to 2 kV.



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