Guide: CREE Career promotes the popularization and application of LED lighting through persevering innovation, and implements the mission of Cree, leading the LED lighting revolution, eliminating low-energy lighting, and fully accelerating the wide application of LED lighting.
Cree's innovation stems from the superior brightness, efficacy, color rendering index, thermal performance and reliability of the XLamp ® LED devices, and escorts customers with brand and intellectual property advantages to help customers lead market status. Technology leadership will better promote market leadership and help companies achieve stronger growth in LED lighting revolution. This article introduces Cree's CXA series of LED and indoor lighting reference solutions, while Cree looks forward to more technical exchanges with industry peers in the future.
Cree recently announced the introduction of XLamp ® CXA1304 LEDs and XLamp ® CXA1816 LEDs, continuing to expand the industry-leading CXA product family, achieving a color rendering index of up to 95, and providing lighting manufacturers with high performance and design flexibility through a robust and reliable platform system And low system cost. Generally speaking, indoor lighting products require a good color consistency, color stability, high color rendering index, comfortable light environment, and excellent energy saving (high light efficiency). Together with the previously launched XLamp ® CXA15 and CXA25, CXA30 series of 6 products, the CXA series currently has 8 products, the luminous flux output coverage is 300-10,000 lm, covering the color temperature range from 2,700 K - 5,000 K, with minimal color rendering. Index (CRI) 80 and 90 options, as well as the latest 95-high display index version, good color consistency, with a minimum light source size of only 6 mm and a maximum of 23 mm, with advantages in narrow, medium and large angles. obvious. At the same time, CXA series LEDs have passed the LM-80 test, meet the requirements of ENERGY STAR, and passed UL certification, which laid a good foundation for safe and reliable indoor lighting design.
Figure 1: XLamp ® CXA Series LED Package, Light Source Size and Luminous Flux
For indoor lighting designs of different sizes, different light fluxes and color temperatures, the XLamp® CXA series can be used. Light efficiency, lumens, excellent light color quality, longevity and reliability are the strengths of Cree's XLamp ® range. The XLamp ® CXA product line enables LED replacement for halogen lamps with a combination of light quality, light output and energy conversion efficiency. The Cree XLamp ® CXA1304 LED is the most compact of the CXA series, with a light source size of 6 mm and a luminous flux of up to 1,034 lm, enabling lighting manufacturers to quickly use the new product in small-sized lighting applications. This article applies XLamp ® The CXA1304 LED small size light source features a design on a small angle MR16 spotlight. The XLamp ® CXA1816 LED, with a light source size of 12 mm, can help replace LED replacement for ceramic metal halide lamps in spotlights, bulbs, and downlight applications. This article applies the XLamp ® CXA1816 LED with its light source size and power advantages designed in the PAR38 reference scheme, which can replace halogen lamps.
CXA1304 MR16
The design goal is to design a small angle MR16 spotlight using the XLamp ® CXA1304 LED and lens. Designed to replace traditional 20 W halogen lamps with a luminous flux of >350 lm. Based on good performance, longevity and color coordinate stability, and high cost performance, the selected model, 3,000 K color temperature, A4 file is the first choice for this design.
Figure 2: XLamp ® CXA1304 LED Brightness and Color Temperature Selection
The XLamp ® CXA1304 LEDs are available in 9 V and 37 V versions for different power drive designs. The XLamp ® CXA1304 LEDs have been tested with the LM-80 to meet ENERGY STAR requirements, which are good for safe and reliable interior lighting design. Foundation. XLamp ® CXA1304 LED is Cree's intellectual property light-emitting diode, which meets the patent regulations of various countries in the world and can be sold in any country.
Figure 3: XLamp ® CXA1304 LED Parameter Characteristics and Ordering Standard Code
LED luminaires require a good cooling system to ensure long-term reliable operation of the luminaire. According to the optical and heat dissipation requirements of this MR16, we use the general-purpose aluminum extrusion processing radiator, the aluminum alloy material is AL6063, and the surface anode is processed to ensure the LED junction temperature is within the proper range.
Figure 4: Structural Cooling Kit
In terms of optics, the lens is used to match the luminaire. This lens is more than 90% optical efficiency with XLamp ® CXA1304 LED. The lens model is BK-LED-373. It is a high-efficiency lens produced by Baikang. It can withstand high temperature above 130°C. It is specially matched with single LED. The lens pattern of the MR16.
Figure 5: CXA1304 MR16 lens
LED devices are combined with the above components such as heat dissipation, optics, and driving power. We have made MR16 spotlights.
Figure 6, Figure 7: A1304 MR16, CXA1304 MR16 light distribution curve
The measured data is compared as follows:
Table 1: CXA1304 MR16 measured data
CXA1816 PAR38
The design goal is to design a small angle PAR38 spotlight using the CXA1816 and reflector. Designed to replace the traditional 120 W halogen lamp with a luminous flux > 1,500 lm and a center light intensity > 12,095 cd. Based on good performance, longevity and color coordinate stability, and high cost performance, the selected model, 3,000 K color temperature, N2 file is the first choice for this design;
Figure 8: XLamp ® CXA1816 LED Brightness and Color Temperature Selection
Figure 9: XLamp ® CXA1816 LED Parameter Characteristics
LED luminaires require a good cooling system to ensure long-term reliable operation of the luminaire. According to the optical and thermal requirements of this PAR38, we use the general-purpose aluminum extrusion processing radiator, the aluminum alloy material is AL6063, and the surface anode is processed to ensure the LED junction temperature is in the proper range when the lamp is running.
Figure 10: PAR38 Structural Cooling Kit
In terms of optics, the reflectors are used to match the lamps. The reflective cup with the CXA1816 has an optical efficiency of over 90%, and the reflector model is PAR38-HS-CXA-W1, which is equipped with the reflector style of the PAR38 kit.
Figure 11: PAR38 Reflector
LED devices are combined with the above components such as heat dissipation, optics, and driving power. We have made PAR38 spotlights.
Figure 12: CXA1816 PAR38
Figure 13: CXA1816 PAR38 light distribution curve
The measured data is compared as follows:
Table 2: CXA1816 PAR38 measured data
The CXA1816 has excellent application value in small-angle PAR spotlight applications. It can easily achieve luminous flux > 1,500 lm, center beam angle of only 14°, center light intensity of 13,146 cd, and light efficiency of over 80 lm/W. The traditional 120 W halogen lamp, but the power does not exceed 20 W, can save a lot of energy.
The above two reference designs are typical solutions for indoor lighting commonly used with single CXA series LEDs. With CXA1304 and CXA1816 LED and heat dissipation kits, secondary optics, power supplies, etc., the lamp structure is simpler and COB is easier. Assembly, no PCB design and reflow process are required to reduce cost and design cycle. With better light efficiency and cost performance, Cree's good LED performance and supporting resources and solutions can help customers better occupy the lighting market. The Cree CXA series has more application areas, solutions and application documents. You can visit the Cree website to learn more about the details.
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