CreeXLampMT-G2LED3-InchDownlightReferenceDesign.pdfVIP

CLD-AP126 rev 0D Cree? XLamp? MT-G2 LED 3-Inch Downlight Reference Design Application Note Table of Contents Introduction 1 Design approach/objectives 2 The 6-step methodology 2 1. Define lighting requirements 2 2. Define design goals 5 3. Estimate efficiencies of the optical, thermal electrical systems 5 4. Calculate the number of LEDs 6 5. Consider all design possibilities 7 6. Complete the final steps: implementation and analysis 7 Conclusion 10 Bill of materials 10 Introduction This application note details the design of a 3-inch downlight that uses Cree’s XLamp? MT?G2 LED, a multi-die, high?flux array optimized for high lumen output directional applications such as downlights, recessed fixtures and can lights. The MT?G2 offers exceptional lumen levels and efficacy and delivers the industry’s best color consistency and superior optical control. Three-inch downlights are commonly used indoors and outdoors in both residential and commercial applications such as soffits and ceilings. The flexibility, high performance and ease of use offered by the XLamp MT?G2 LED makes it a strong candidate for use in a 3-inch downlight. The first EasyWhite? LED array built on the SC3 Technology? Platform, Cree’s XLamp MT-G2 LED pushes performance limits to redefine lumen levels and efficacy while delivering the industry’s best color consistency and superior optical control. MT-G2 LEDs are designed for high-output, directional lighting applications and are the ideal replacement for lighting applications that currently use inefficient halogen lamps. MT-G2 LEDs are optimized for use in accent, track, retail display and downlighting applications where color quality, consistency and Reliance on any of the information provided in this Application Note is at the user’s sole risk. Cree and its affiliates make no warranties or representations about, nor assume any liability with respect to, the information in this document or any LED-based lamp or luminaire made in accordance with this re