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CXA2520-0000-000N00R240F 数据表(PDF) 10 Page - Cree, Inc

部件名 CXA2520-0000-000N00R240F
功能描述  6-Inch Downlight Reference Design
Download  12 Pages
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制造商  CREE [Cree, Inc]
网页  http://www.cree.com/
标志 CREE - Cree, Inc

CXA2520-0000-000N00R240F 数据表(HTML) 10 Page - Cree, Inc

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10
XLamp CXa2520 LED
6-inCh DownLight
REfEREnCE DEsign
Copyright © 2013 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. For product specifications, please see the data sheets available at www.cree.com. For warranty information, please contact Cree Sales at sales@cree.com.
Results
Thermal Results
Cree verified the board temperature with a thermocouple to confirm that the thermal dissipation performance of the heat
sink aligns with our simulations. The measured solder point temperature was 41 °C.
Based on the measured solder point temperature, the T
J can be calculated as follows.
T
J = TSp + (LED power * LED thermal resistance)
T
J = 41 °C + (26 W * 0.8 °C/W)
T
J = 62 °C
This thermal performance is in line with the thermal simulation.
Estimated LED Lifetime
Based on thousands of hours of long-term testing of the cXa2011 leD at higher temperatures than the measured
41 °C T
Sp of the CXA2520 downlight, Cree expects an L70 lifetime significantly longer than 50,000 hours. 42‑W CFL
lamps typically have lifetimes ranging from 10,000 to 12,000 hours, so the 4 to 5 times longer lifetime of the cXa2520
downlight offers solid maintenance cost savings.
Optical and Electrical Results
We tested the downlight in a 1.5‑meter sphere after a 60‑minute stabilization time to obtain the results in Table 7.13 as
the table shows, the downlight meets the target goals for the design. The 2140-lm light output positions this downlight
in the upper reaches of the light output of downlights currently on the market. The downlight also meets the ENERGY
STAR light output, efficacy, power factor, CCT and CRI requirements.
Characteristic
unit
Downlight
Luminous flux
lm
2140
Luminaire efficacy
lm/w
82
cutoff angle
°
50
ccT
K
3046
crI
100-point scale
80
power
w
26.1
power factor
0.95
table 7: CXA2520 downlight steady-state results
We also tested the intensity distribution of the downlight. Figure 7 shows an even intensity distribution with a 56° beam
angle. The figure also shows the 50° cutoff angle that was a goal of this effort.
13 Testing was performed at the Cree’s Shenzhen Technology Center. An IES file for the downlight is available at: www.cree.com/
xlamp_app_notes/cXa2520_downlight_ies


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