PRODUCT FAMILY DATA SHEET XLamp CMT1945 LED PRODUCT DESCRIPTION FEATURES TABLE OF CONTENTS The XLamp High-Current LED Array family 14.5-mm optical source Characteristics ............................................... 2 is optimized for best-in-class lumen output, Available in 70-, 80- and 90- and Operating Limits ............................................. 2 efficacy and reliability at high drive currents. 95-minimum CRI options Flux Characteristics, EasyWhite Order XLamp CMT LEDs deliver performance in EasyWhite 2-, 3- and 5-step binning Codes and Bins .............................................. 3 industry-compatible packages and LESes, Premium Color 2- and 3-step binning Flux Characteristics, Premium Color Order enabling lighting manufacturers to upgrade Forward voltage option: 36-V class Codes and Bins .............................................. 4 their designs for applications such as track, 85C binning and characterization Relative Spectral Power Distribution, downlight and outdoor lighting. XLamp Maximum drive current: 2500mA EasyWhite LEDs ............................................ 5 High-Current LED Arrays are available in 115 viewing angle, uniform Relative Spectral Power Distribution, 2-step, 3-step and 5-step EasyWhite bins. chromaticity profile Premium Color LEDs ...................................... 6 Top-side solder connections Electrical Characteristics ............................... 8 RoHS and REACh compliant Relative Luminous Flux .................................. 9 UL recognized component (E349212) Typical Spatial Distribution ............................ 9 Performance Groups - Chromaticity ........... 10 Premium Color Performance Groups - Chromaticity ................................................. 11 EasyWhite Bins Plotted on the 1931 CIE Color Space .................................................. 12 Premium Color Bins Plotted on the 1931 CIE Color Space............................................ 13 Bin and Order Code Formats ....................... 15 Mechanical Dimensions .............................. 16 Thermal Design ............................................ 17 Notes ............................................................ 18 Packaging ..................................................... 19 Cree LED / 4400 Silicon Drive / Durham, NC 27703 USA / +1.919.313.5330 / www.cree-led.com 2017-2021 Cree LED. The information in this document is subject to change without notice. Cree and the Cree logo are registered trademarks, and CLD-DS166 the Cree LED logo is a trademark, of Wolfspeed, Inc. XLamp and EasyWhite are registered trademarks of Cree LED. UL and the UL logo are registered 1 REV 8A trademarks of UL LLC. XLAMP CMT1945 LED CHARACTERISTICS Characteristics Unit Minimum Typical Maximum Viewing angle (FWHM) degrees 115 ESD withstand voltage (JEDEC JS-001-2012) V Class 3A DC forward current mA 2500* Reverse current mA 0.1 Forward voltage ( 1200mA, 85C) V 34.7 38.2 * Refer to the Operating Limits section. OPERATING LIMITS The maximum current rating of the CMT1945 depends on the case temperature (Tc) when the LED has reached thermal equilibrium under steady-state operation. The graph shown below assumes that the system design employs good thermal management (thermal interface material and heat sink) and may vary when poor thermal management is employed. Either solder pad shown in the Mechanical Dimensions section on page 16 can be used as the Tc measurement point. Another important factor in good thermal management is the temperature of the Light Emitting Surface (LES). Cree LED recommends a maximum LES temperature of 140C to ensure optimal LED lifetime. Please refer to the Thermal Design section on page 17 for more information on LES temperature measurement. CMT1945 - Standard 2750 85 C, 2500 mA 2500 2250 2000 1750 1500 1250 125 C, 1000 962 mA 750 500 250 0 0 25 50 75 100 125 150 Case Temperature (C) 2017-2021 Cree LED. The information in this document is subject to change without notice. Cree and the Cree logo are registered trademarks, and CLD-DS166 the Cree LED logo is a trademark, of Wolfspeed, Inc. XLamp and EasyWhite are registered trademarks of Cree LED. UL and the UL logo are registered 2 REV 8A trademarks of UL LLC. If (mA)