XLAMP® XP-C LED
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.
Thermal Design
White, Royal Blue, Blue
600
500
Green
400
Rj-a = 15°C/W
300
Rj-a = 20°C/W
Rj-a = 25°C/W
Rj-a = 30°C/W
200
100
0
0
20
40
60
80
100
120
140
160
Ambient Temperature (ºC)
Relative Intensity vs. Current (Tj = 25ºC)
600
GRAPH 8
White, Blue, Royal Blu
500
GRAPH
Green
400
Rj-a = 25°C/W
300
Rj-a = 30°C/W
Rj-a = 35°C/W
Rj-a = 40°C/W
200
100
0
0
20
40
60
80
100
120
140
160
Ambient Temperature (ºC)
Copyright © 2008-2018 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. UL® and
the UR logo are registered trademarks of UL LLC.
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