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CXA2540-0000-000N00U435H Datasheet(PDF) 2 Page - Cree, Inc

Part # CXA2540-0000-000N00U435H
Description  Retail Track Light Reference Design
Download  15 Pages
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Manufacturer  CREE [Cree, Inc]
Direct Link  http://www.cree.com/
Logo CREE - Cree, Inc

CXA2540-0000-000N00U435H Datasheet(HTML) 2 Page - Cree, Inc

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XLAMP CXA2530/CXA2540 RETAIL TRACK LIGHT 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
and EasyWhite™ is a trademark 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.
The appendix to this reference design shows the results obtained when an XLamp CXA2540 LeD was used in place of
the CXA2530 LeD.
DEsign AppRoACh/objECTivEs
In the “LeD Luminaire Design Guide” application note, Cree advocates a 6-step framework for creating LeD luminaires.1
All Cree reference designs use this framework, and the design guide’s summary table is reproduced below.
step
Explanation
1.
Define lighting requirements
• The design goals can be based either on an existing fixture or on the application’s lighting requirements.
2.
Define design goals
• Specify design goals, which will be based on the application’s lighting requirements.
• Specify any other goals that will influence the design, such as special optical or environmental requirements.
3.
Estimate efficiencies of the
optical, thermal & electrical
systems
• Design goals will place constraints on the optical, thermal and electrical systems.
• Good estimations of efficiencies of each system can be made based on these constraints.
• The combination of lighting goals and system efficiencies will drive the number of LEDs needed in the
luminaire.
4.
Calculate the number of LeDs
needed
• Based on the design goals and estimated losses, the designer can calculate the number of LeDs to meet the
design goals.
5.
Consider all design
possibilities and choose the
best
• with any design, there are many ways to achieve the goals.
• LED lighting is a new field; assumptions that work for conventional lighting sources may not apply.
6.
Complete final steps
• Complete circuit board layout.
• Test design choices by building a prototype luminaire.
• make sure the design achieves all the design goals.
• Use the prototype to further refine the luminaire design.
• record observations and ideas for improvement.
Table 1: Cree 6-step framework
ThE 6-sTEp mEThoDoLogy
The goal for this project is to demonstrate an easy-to-implement, high-output lamp that can better the performance of
39-w CmH lamps currently on the market, showing that a narrow-beam 39-watt equivalent retail track light is possible
using a single XLamp CXA2530 LeD.2
1. DEfinE LighTing REquiREmEnTs
Table 2 shows a ranked list of desirable characteristics to address in a track light.
1
LeD Luminaire Design Guide, Application Note AP15, www.cree.com/xlamp_app_notes/luminaire_design_guide
2
Production and cost-optimized implementations are beyond the scope of this document.


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