XQ-A Datasheet, PDF (13/19 Pages) Cree, Inc – Cree XLamp XQ-A LEDs

XLamp^® XQ-A 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
Th^aeⁿr^dm^oa^pl^tD^ice^as^l i^cg^hn^ar-^aw^cth^ei^rt^ise^tics.
Thermal Design - blue
White
350
Royal Blue, Blue
300
300
250
250
200
200
150
150
Rj-a = 25 °C/W
100
Rj-a = 30 °C/W
100
Rj-a = 20 °C/W
Rj-a = 25 °C/W
Rj-a = 35 °C/W
50
50
Rj-a = 30 °C/W
Rj-a = 40 °C/W
Rj-a = 35 °C/W
0
Thermal D⁰ esign²-⁰ green⁴⁰
60
80
Thermal0 Design - PC amber
100
120
140
160
0
20
40
60
80
100
120
140
160
Ambient Temperature (ºC)
Ambient Temperature (ºC)
Green
PC Amber
300
300
250
250
200
200
150
150
100
Rj-a = 40 °C/W
100
Rj-a = 25 °C/W
Rj-a = 45 °C/W
50
Rj-a = 50 °C/W
Rj-a = 30 °C/W
50
Rj-a = 35 °C/W
Rj-a = 55 °C/W
Rj-a = 40 °C/W
0
0
20
40
60 ^Therm80 ^{al De}1^s00^{ign - r}1^e20^d-ora1ⁿ40^{ge, re}1^d60
0
0
20
40
60
80
100
120
140
160
Ambient Temperature (ºC)
Ambient Temperature (ºC)
Red-Orange, Red
300
250
200
150
100
Rj-a = 20 °C/W
Rj-a = 25 °C/W
50
Rj-a = 30 °C/W
Rj-a = 35 °C/W
0
0
20
40
60
80
100
120
140
160
Ambient Temperature (ºC)
Copyright © 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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