Datasheet
Copyright © 2006-2009 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree,
the Cree logo and XLamp are registered trademarks of Cree, Inc.
10 CLD-DS05.011
Cree, Inc.
4600 Silicon Drive
Durham, NC 27703
USA Tel: +1.919.313.5300
www.cree.com/xlamp
Temp.
Maximum Percent Relative Humidity
30% 40% 50% 60% 70% 80% 90%
30ºC 9 5 4 3 1 1 1
25ºC 12 7 5 4 2 1 1
20ºC 17 9 7 6 2 2 1
Notes
Lumen Maintenance Projections
Based on internal long-term reliability testing, Cree projects that white XLamp XR-E LEDs will deliver median 70% lu-
men maintenance after 50,000 hours of operation at a forward current of 700 mA. This projection is based on constant
current operation with junction temperature maintained at or below 135°C and ambient air temperature maintained at
or below 25°C.
Cree projects royal blue, blue, green and white XLamp XR-E LEDs to maintain a mean 70% lumen maintenance after
50,000 hours, provided the LED junction temperature is maintained at or below 90°C and ambient air temperature is
maintained at or below 85°C.
Please read the XLamp Reliability application note for more details on Cree’s lumen maintenance testing and forecasting.
Please read the XLamp Thermal Management application note for details on how thermal design, ambient temperature,
and drive current affect the LED junction temperature.
Moisture Sensitivity
XLamp LEDs are shipped in sealed, moisture-barrier bags
(MBB) designed for long shelf life. If XLamp LEDs are exposed
to moist environments after opening the MBB packaging
but before soldering, damage to the LED may occur during
the soldering operation. The following derating table denes
the maximum exposure time (in days) for an XLamp LED in
the listed humidity and temperature conditions. LEDs with
exposure time longer than the time specied below must be
baked according to the baking conditions listed at right.
Baking Conditions
It is not necessary to bake all XLamp LEDs. Only the LEDs that meet all of the following criteria must be baked:
1. LEDs that have been removed from the original MBB packaging
2. LEDs that have been exposed to a humid environment longer than listed in the Moisture Sensitivity section above
3. LEDs that have not been soldered
LEDs should be baked at 80ºC for 24 hours. LEDs may be baked on the original reels. Remove LEDs from MBB packaging
before baking. Do not bake parts at temperatures higher than 80ºC. This baking operation resets the exposure time as
dened in the Moisture Sensitivity section above.
Storage Conditions
XLamp LEDs that have been removed from original MBB packaging but not soldered yet should be stored in a room or
cabinet that will maintain an atmosphere of 25 ± 5ºC and no greater than 10% RH (relative humidity). For LEDs stored
in these conditions, storage time does not add to exposure time as dened in the Moisture Sensitivity section above.
RoHS Compliance
The levels of environmentally sensitive, persistent biologically toxic (PBT), persistent organic pollutants (POP), or other-
wise restricted materials in this product are below the maximum concentration values (also referred to as the threshold
limits) permitted for such substances, or are used in an exempted application, in accordance with EU Directive 2002/95/
EC on the restriction of the use of certain hazardous substances in electrical and electronic equipment (RoHS), as
amended through April 21, 2006.
Vision Advisory Claim
Users should be cautioned not to stare at the light of this LED product. The bright light can damage the eye.