XQEAWT-00-0000-00000LEE1 Datasheet, PDF (11/16 Pages) Cree, Inc – XLamp XQ-E LEDs

xlamp^® xQ-e leds
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
Th_ae_mr_bm_iea_ntl _iD_ne_os_rdig_en_{r t}-_o w_oph_tii_mte_{ize lamp life and optical characterisTthicesr. mal Design - royal blue, blue}
White Blue
1200
1200
1000
1000
800
800
600
Rj-a = 10 °C/W
Rj-a = 15 °C/W
400
Rj-a = 20 °C/W
200
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
Therma⁰ l
Des²⁰ign
-
green ⁴⁰
60
80
Ambient Temperature
100
(ºC)
120
140
Therma⁰ l
Des²⁰ign
- PC amber ⁴⁰
60
80
Ambient Temperature
100
(ºC)
120
140
Green PC Amber
1200
1200
1000
1000
800
800
600
Rj-a = 15 °C/W
400
Rj-a = 20 °C/W
Rj-a = 25 °C/W
Rj-a = 30 °C/W
200
600
Rj-a = 15 °C/W
400
Rj-a = 20 °C/W
Rj-a = 25 °C/W
Rj-a = 30 °C/W
200
0
0
0
20
40
Thermal ⁶⁰
80
Ambient Temperature (ºC)
D¹⁰⁰esign¹²⁰-
am¹b⁴⁰er,
red-ora⁰nge,
r²e⁰ d
40
60
80
100
Ambient Temperature (ºC)
120
140

1200
Red-Orange, Red
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 © 2013-2014 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.
11