XP-E-HEW Datasheet, PDF (5/11 Pages) Cree, Inc – Cree® XLamp® XP-E High-Efficiency White LEDs

XLAMP XP-E HIGH-EFFICIENCY WHITE LEDS
ELECTRICAL CHARACTERISTICS (T_J = 25°C)
Electrical Characteristics (Tj = 25ºC)
1000
900
800
700
600
500
400
300
200
100
0
2.00
2.25
2.50
2.75
3.00
Forward Voltage (V)
3.25
3.50
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.
1200
1000
800
600
Rj-a = 10°C/W
Rj-a = 15°C/W
400 Rj-a = 20°C/W
Rj-a = 25°C/W
200
0
0
20
40
60
80
100
120
140
Ambient Temperature (ºC)
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.
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