Datasheet

xlamp
®
xm-l leds
Copyright © 2010 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.
8
Copyright © 2010-2014 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.
8
TYPICAL SPATIAL DISTRIBUTION
THERMAL DESIGN
The maximum forward current is determined by the thermal resistance between the LED junction and ambient. It is
crucial for the end product to be designed in a manner that minimizes the thermal resistance from the solder point to
ambient in order to optimize lamp life and optical characteristics.
0%
20%
40%
60%
80%
100%
-100 -80 -60 -40 -20 0 20 40 60 80 100
Relative Luminous Intensity
Angle (º)
Thermal Design
0
500
1000
1500
2000
2500
3000
3500
0 20 40 60 80 100 120 140
Maximum Current (mA)
Ambient Temperature (ºC)
Rj-a = 4°C/W
Rj-a = 7
°
C/W
Rj-a = 10°C/W
Rj-a = 15
°
C/W