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Illumination & Displays

LED arrays


Cree introduces the CXA1507/12 and CXA2520/30 arrays that span the range from 500 lm to 5000 lm in output. The company is positioning the arrays as a quick way for solid-state lighting (SSL) manufacturers to get luminaires and retrofit lamps to market while still delivering products with good color quality and efficacy.

Cree presents the CXA arrays as a middle ground between the options of designing an SSL product with discrete LEDs or using a finished modular light engine. The arrays can't match the lower bill of material costs of a design using discrete LEDs, but the engineering cost and development time are significantly reduced.

The four new arrays are packaged on a metal-core boards and come in two sizes. The CXA1507/12 measures 15.85×15.85 mm with a 9-mm light emitting surface (LES) while the CXA2520/30 measures 23.85×23.85 mm with a 23-mm LES.

The efficacy for the new arrays ranges from 99-108 lm/W at 85°C and nominal drive current. All require a forward voltage in the 36V to 37V range. The forward voltage in that range is globally popular as companies make SSL products that can be sold in different regions around the globe with different AC line voltage.

The arrays feature large accessible solder pads, and a significant buffer zone between the pads and the actual array that provides room for an optic to be tightly installed around the array.

The four new components are available in color temperatures ranging from 2700-5000K. Cree is optionally offering the components with a CRI of 90, and in 2-step MacAdam ellipse bins based on the EasyWhite color mixing technology.

Product development teams that want to use the arrays can design their own mounting scheme, or turn to connectors from Molex, TE Connectivity and Mekoda Optical that are purpose built for the arrays. Those connectors would also accelerate the design cycle.