Datasheet
Copyright © 2006-2011 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree, the Cree logo and XLamp are registered trade-
marks of Cree, Inc.
XLAMP XR-E LEDS
10
CLD DS-05.011CLD DS-05.011
NOTES
Lumen Maintenance Projections
Based on internal long-term reliability testing, Cree
projects that white XLamp XR-E LEDs will deliver median
70% lumen 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 tempera-
ture is maintained at or below 90°C and ambient air tem-
perature is maintained at or below 85°C.
Please read the XLamp Long-Term Lumen Maintenance
application note for more details on Cree’s lumen main-
tenance 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 tempera-
tures higher than 80ºC. This baking operation resets the
exposure time as dened in the Moisture Sensitivity sec-
tion 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 sec-
tion above.
RoHS Compliance
The levels of environmentally sensitive, persistent biologi-
cally toxic (PBT), persistent organic pollutants (POP), or
otherwise 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
WARNING: Do not look at exposed lamp in operation. Eye
injury can result. See LED Eye Safety at http://www.cree.
com/products/pdf/XLamp_EyeSafety.pdf.
Intellectual Property
For remote phosphor applications, a separate license to
certain Cree patents is required.
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