PRODUCT FAMILY DATA SHEET XLamp CXB2540 LED PRODUCT DESCRIPTION FEATURES TABLE OF CONTENTS The XLamp CXB2540 LED Array is a 19-mm optical source Characteristics ............................................... 2 member of the second generation of the Mechanical and optical design Operating Limits ............................................. 2 CXA family that delivers up to 30% higher consistent with other CXA25 and Flux Characteristics, EasyWhite Order efficacy and up to 20% higher lumens than CXB25 LEDs Codes and Bins .............................................. 3 the first generation in the same LES. The Available in 70, 80, 90 and Flux Characteristics, Premium Color Order higher performance second generation 95minimum CRI options Codes and Bins .............................................. 6 CXA LED Arrays provide a drop-in EasyWhite 2, 3 and 5step binning Relative Spectral Power Distribution ............ 7 performance upgrade to existing CXA LED Premium Color 2- and 3-step binning Relative Spectral Power Distribution, designs to shorten product development Forward voltage option: 36-V class Premium Color ............................................... 7 time. In addition, the CXB LEDs also 85C binning and characterization Electrical Characteristics ............................... 8 allow lighting manufacturers to achieve Extremely uniform color over viewing Relative Luminous Flux .................................. 9 the same or better performance with a angle Typical Spatial Distribution .......................... 10 smaller LES, enabling a smaller, more Top-side solder connections Performance Groups - Brightness .............. 10 impactful luminaire. Available in 2step, Thermocouple attach point Performance Groups - Chromaticity ........... 11 3-step and 5-step EasyWhite bins and NEMA SSL3 2011 standard flux bins Premium Color Performance Groups - 2step and 3step Premium Color bins, the RoHS and REACh compliant Chromaticity ................................................. 12 CXB2540 LED delivers high lumen output UL recognized component (E349212) EasyWhite Bins Plotted on the 1931 CIE and high efficacy in a single, easytouse Color Space .................................................. 13 package that eliminates the need for reflow Premium Color Bins Plotted on the 1931 soldering. CIE Color Space............................................ 14 Bin and Order Code Formats ....................... 16 The CX Family LED Design Guide provides Mechanical Dimensions .............................. 16 basic information on the requirements Thermal Design ............................................ 17 to use the CXB2540 LED successfully in Notes ............................................................ 18 luminaire designs. Packaging ..................................................... 19 Cree LED / 4400 Silicon Drive / Durham, NC 27703 USA / +1.919.313.5330 / www.cree-led.com 2015-2021 Cree LED. The information in this document is subject to change without notice. Cree and the Cree logo are registered trademarks, and CLD-DS123 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 10A trademarks of UL LLC. XLAMP CXB2540 LED CHARACTERISTICS Characteristics Unit Minimum Typical Maximum Viewing angle (FWHM) degrees 115 ESD withstand voltage (HBM per MilStd883D) V 8000 DC forward current mA 2100* Reverse current mA 0.1 Forward voltage ( 1100mA, T = 85C) V 34.1 38 j * Refer to the Operating Limits section. OPERATING LIMITS The maximum current rating of the CXB2540 depends on the case temperature (Tc) when the LED has reached thermal equilibrium under steadystate 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. Please refer to the Mechanical Dimensions section on page 16 for the location of 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 135C to ensure optimal LED lifetime. Please refer to the Thermal Design section on page 17 for more information on LES temperature measurement. CXB2540 - Standard 2400 85 C, 2100 mA 2100 1800 1500 1200 900 125 C, 808 mA 600 300 0 0 25 50 75 100 125 150 Case Temperature (C) 2015-2021 Cree LED. The information in this document is subject to change without notice. Cree and the Cree logo are registered trademarks, and CLD-DS123 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 10A trademarks of UL LLC. If (mA)