Electrical Characteristics (T
J
= 25°C)
1500
1400
1300
1200
Forward Current (mA)
1100
1000
900
800
700
600
500
400
300
200
100
0
2.00
2.25
2.50
2.75
3.00
3.25
3.50
3.75
Forward Voltage (V)
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.
1600
1400
Maximum Current (mA)
1200
1000
800
600
400
200
0
0
20
40
60
80
100
120
140
Rj-a = 10°C/W
= 10°C/W
Rj-a = 15°C/W
= 15°C/W
Rj-a = 20°C/W
= 20°C/W
Rj-a = 25°C/W
= 25°C/W
Ambient Temperature (ºC)
Copyright © 2009-2010 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.
4
CLD-DS20 Rev 3
Cree, Inc.
4600 Silicon Drive
Durham, NC 27703
USA Tel: +1.919.313.5300
www.cree.com/xlamp
CREE [ CREE, INC ]
