28 January 2010


Avago launches first water-resistant high-brightness tricolor surface-mount LEDs for full-color signs

Avago Technologies of San Jose, CA, USA has developed what it claims is the first compact water-resistant high-brightness tricolor surface-mount LEDs for use in indoor and outdoor full-color signs and displays.

The ASMT-YTBO plastic leaded chip carrier (PLCC)-6 blackbody and ASMT-QTCO industry-standard PLCC-4 LEDs have been enhanced to make them water-resistant (complying with IPx6 per IEC 60529:2001). A protection cover is hence not needed, saving money for indoor and outdoor display designers. The compact tricolor LEDs suit use in electronic video screens and advertising signs used in transit malls, airports, and stadium scoreboards, says Avago.

The firm adds that its enhanced ASMT-YTBO LEDs provide full-color display application designers with better color control and contrast ratio as well as a 115º viewing angle, and that they are designed especially to meet indoor and outdoor LED screen requirements for better screen resolution (greater than 12mm pixel size) and high-brightness performance. They also have six leads to enable enhanced thermal management and individual color control of each chip to display a multitude of colors (including white). With dimensions of 4.4mm x 4.4mm x 3.5mm, the LEDs also incorporate silicone encapsulation material to aid reliability and extend light output performance over the LEDs’ long operating lifetime (more than 50,000 hours).

The compact ASMT-QTCO package incorporates a separate heat path for each LED dice to enable it to be driven at higher currents. These SMT LEDs can hence operate in a wide range of environmental conditions, providing high reliability.

Both tricolor LEDs are compatible with reflow soldering processes and have a moisture sensitivity level of 2a (JEDEC MSL 2a), suiting use in SMT production environments.

The ASMT-YTBO and ASMT-QTCO LEDs are priced at $0.60 and $0.58 each, respectively, in minimum quantities of 1,000 pieces.

See related item:

LEDs in signage & professional displays to grow to $1.8bn in 2015

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