Datasheet

Copyright © 2008-2010 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree, the Cree logo and XLamp are registered trade-
marks of Cree, Inc.
8
XLAMP XP-C LEDS
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.
White, Blue,
Royal Blue
Thermal Design
XPC
Relative Intensity vs. Current (Tj = 25ºC)
GRAPH 8a
Green
0
100
200
300
400
500
600
0 50 100 150 200
Maximum Current (mA)
Ambient Temperature (ºC)
Rj-a = 15°C/W
Rj-a = 20°C/W
Rj-a = 25°C/W
Rj-a = 30°C/W
0
100
200
300
400
500
600
0 20 40 60 80 100 120 140 160
Maximum Current (mA)
Ambient Temperature (ºC)
Rj-a = 25°C/W
Rj-a = 30°C/W
Rj-a = 35°C/W
Rj-a = 40°C/W
Green
0
100
200
300
400
500
600
0 20 40 60 80 100 120 140 160
Maximum Current (mA)
Ambient Temperature (ºC)
Rj-a = 15°C/W
Rj-a = 20°
C/W
Rj-a = 25°C/W
Rj-a = 30°C/W