XP-E2 Datasheet, PDF (20/39 Pages) Cree, Inc – Cree XLamp XP-E2 LEDs

XLamp^® XP-E2 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 - royal blue - same as blue
White Royal Blue, Blue
1200
1200
1000
1000
800
800
600
600
400
Rj-a = 10°C/W
400
Rj-a = 10°C/W
Rj-a = 15°C/W
200
Rj-a = 20°C/W
Rj-a = 15°C/W
200
Rj-a = 20°C/W
Rj-a = 25°C/W
Rj-a = 25°C/W
Thermal D⁰es⁰ ign - g²⁰reen ⁴⁰
60
80
100
120
140
160
0
0
20
40
60
80
100
120
140
160
Ambient Temperature (ºC)
Ambient Temperature (ºC)
Thermal Design - PC amber
Green PC Amber
1200
1200
1000
1000
800
800
600
600
400
Rj-a = 20°C/W
400
Rj-a = 10°C/W
Rj-a = 25°C/W
200
Rj-a = 30°C/W
Rj-a = 15°C/W
200
Rj-a = 20°C/W
Rj-a = 35°C/W
Rj-a = 25°C/W
0
0
0
20
40
60
80
100
120
140
160
0
20
40
60
80
100
120
140
160
Thermal Design - amber
Ambient Temperature (ºC)
Thermal Design - red-orang^Ae^m,^bir^ene^td^{Temperature (ºC)}
Amber Red-Orange, Red
1200
1200
1000
1000
800
800
600
600
400
Rj-a = 10°C/W
Rj-a = 15°C/W
200
Rj-a = 20°C/W
Rj-a = 25°C/W
0
0
20
40
60
80
100
120
140
160
Ambient Temperature (ºC)
400
Rj-a = 10°C/W
Rj-a = 15°C/W
200
Rj-a = 20°C/W
Rj-a = 25°C/W
0
0
20
40
60
80
100
120
140
160
Ambient Temperature (ºC)
Copyright © 2012-2016 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree^® and XLamp^® are registered trademarks and the Cree logo is a trademark of
Cree, Inc. UL^® and the UR logo are registered trademarks of UL LLC.
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