Datasheet

22
Copyright © 2013-2015 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree
®
, the Cree logo, XLamp
®
and EasyWhite
®
are
registered trademarks of Cree, Inc. UL
®
and the UR logo are registered trademarks of UL LLC.
2
XLamp
®
CXa2540 LED
CHARACTERISTICS
Characteristics Unit Minimum Typical Maximum
Viewing angle (FWHM) degrees 115
ESD withstand voltage (HBM per Mil-Std-883D) V 8000
DC forward current mA 2100*
Reverse current mA 0.1
Forward voltage (@ 1100 mA, T
j
= 85 °C) V 36.2
Forward voltage (@ 1100 mA, T
j
= 25 °C) V 42
* Refer to the Operating Limits section.
OPERATING LIMITS
The maximum current rating of the CXA2540 is dependent on the case temperature (Tc) when the LED has reached
thermal equilibrium under steady-state operation. The graph shown below assumes that the system design employs
good thermal management (thermal interface material and heat sink) and may vary when poor thermal management is
employed. Please refer to the Mechanical Drawings section on page 17 for the location of the Tc measurement point.
CXA2540
0
300
600
900
1200
1500
1800
2100
2400
0 25 50 75 100 125 150
If (mA)
Case Temperature (°C)