xlamp mK-R leds

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.

5

5

electrical characteristics (t

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.

Electrical Characteristics (Tj = 85ºC)

0

250

500

750

1000

1250

10.0

10.5

11.0

11.5

12.0

12.5

Forward Voltage (V)

Thermal Design

0

200

400

600

800

1000

1200

1400

0

20

40

60

80

100

120

140

Ambient Temperature (ºC)

Rj-a = 2

°C/W

Rj-a = 4

°C/W

Rj-a = 6

°C/W

Rj-a = 8

°C/W