news digest ♦ LEDs LEDs Everlight extends JU series
of COB LEDs The firm’s expanding portfolio of single light sources for directional lighting applications offer a cost/performance ratio of over 400lm/$
Everlight has expanded its JU series of chip-on-board (COB) LEDs to include 7, 10 and 15 W types in addition to the existing 4W version.
COB LEDs are especially suited for directional applications that require a powerful single light source for effective illumination such as GU, MR and PAR retrofits, downlights and candelabras.
The JU series now consists of four JU1215 (15 x 12 x 1.6mm) and one JU2024 (20 x 24 x 1.6mm) type/s with powers ranging from 4 watts to 15 watts.
CCT, a CRI of over 80Ra and 25°C substrate temperature, and are available in versions ranging from ANSI bin 2,700 K to 6,500 K. The JU series also offers 3 step (McAdam) options for advanced utilisation.
JU COB LEDs are multi-chip solutions that are directly applied to the board without housing, for efficient thermal dissipation. Their ceramic substrate base allows for thermal resistances of below 2°C/W, with the largest wattage COB measuring around 0.8C°/W. Low thermal resistance and good heat dissipation ensure high reliability and increase the LEDs’ service life.
Each COB has its unique features with carefully calculated chip configurations for optimal lumens per dollar of over 400lm/$ and optically compact light emission surfaces (LES) for effective pairing with secondary optics.
Additional JU COB options such as “Color Choice”, high voltages from 45 to 250V for different regions and applications, and high CRI (>90Ra) are available to meet customers’ specific needs. All JU COBs have completed LM80 lumen maintenance testing and are offered with a complete line of accessories such as standardized holders, appropriate reflectors and more.
The future product roadmap of the JU family provides for additional higher power members as 25W / 35W / 50W for track light, down light or low bay applications by Q4/2013. Meanwhile, 4W / 8W / 13W / 17W / 26W MCPCB 120lm/W COB are coming out for wider options.
Samples are available upon request and mass production has already started.
Air Water to develop GaN-on- SiC-on- silicon with Aixtron reactor
JU 1215 LEDs
The company is building on large diameter SiC on silicon technology for LEDs and power devices
Air Water of Azumino in Japan has reported the successful installation of a fully automated Aixtron AIX G5 HT planetary reactor in an 8 x 6 inch configuration for the growth of GaN epitaxial layers.
JU 2024 LED All types provide an efficacy of 110lm/W or more at 3000K 66
www.compoundsemiconductor.net August/September 2013 Aixtron AIX G5 HT planetary reactor
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