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How to choose SMD and COB?

Published by ADAYOLIGHTING 2024-03-28
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  • SMD refers to Surface Mounted Devices, which is one of the SMT (Surface Mount Technology) components. In the initial stage of electronic circuit board production, over-hole assembly is done entirely by hand. Surface Mounted components mainly include rectangular chip components, cylindrical chip components, composite chip components, and shaped chip components.

     

    SMD assembly density, small size of electronic products, light weight, SMD components of the volume and weight of only about 1/10 of the traditional cartridge components, the general use of SMT after the volume of electronic products reduced by 40% to 60%, weight reduction of 60% to 80%. High reliability, high vibration resistance. Low defect rate of solder joints. Good high frequency characteristics, reducing electromagnetic and RF interference.

     

    SMD LED chips are available in a variety of sizes: 2835, 3030, 5050, etc. They are named according to their dimensions: length and width. For example, 2835 measures 2.8 x 3.5 mm, 3030 is 3.0 x 3.0 mm, and 5050 is 5.0 x 5.0 mm.

     

     

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    COB, which means Chip On Board, is a high power integrated surface light source. That is, in the substrate on the succession of multiple chips integrated together for packaging. Mainly used to solve the problem of small power chip manufacturing high-power LED lights, can disperse the chip heat dissipation, improve light efficiency. The LED chip will be directly affixed to the high reflectivity of the mirror metal substrate of high light efficiency integrated surface light source technology, this technology eliminates the concept of bracket, no plating, no reflow, no SMD process, so the process is reduced by nearly one-third, the cost is also saved by one-third.

     

    COB light source can design the light source's light output area and shape size according to the product shape structure. Product features are cheap, convenient, electrically stable, circuit design, optical design, heat dissipation design scientific and reasonable, high color rendering, uniform luminescence, no light spot, health and environmental protection.

     

     

    ADAYO flush mount lighting manufacturer

     

     

    The difference between SMD and COB

    1. Different production efficiency

    SMD: SMD's production efficiency is low.

    COB: The production efficiency of COB is higher than that of SMD.

     

    2. The light quality is different

    SMD: SMD's discrete device combination exists point light, glare.

    COB: COB's perspective is large and easy to adjust, there is no point light, glare.

     

    3. The process is different

    SMD: is the LED chip with conductive and insulating adhesive fixed on the pad of the lamp bead holder, and then use the same conductive performance welding and COB package, performance testing, epoxy resin adhesive encapsulation, and then the process of spectroscopy, cutting and playing braided tape, transported to the screen factory.

    COB: is the LED chip directly with conductive and insulating adhesive fixed in the PCB board lamp beads on the pads of the lamp position, and then the LED chip conduction performance welding, after the test is complete, with epoxy resin adhesive encapsulation.

     

    4. The technology is different

    SMD: LED during the need to first surface mounted devices, and then fixed on the PCB board by way of reflow soldering.

    COB: no need to mount and reflow soldering process, COB light source directly applied to the led light.

     

    To conclude, both SMD and COB have a wide range of applications. As a Flush mount lighting manufacturer, ADAYO lighting currently has many version of lamps that use both SMD and COB light sources, and you can choose the SMD or COB type according to your needs for energy efficiency and versatility.

     

     

    ADAYO flush mount lighting manufacturer

     

     

    Like this 360 rotating flush mount lighting we have both SMD and COB version, SMD can choose single color temperature or CCT3, COB can only choose single color temperature.The other designs of the two versions flush mount lighting are basically the same, 360 degrees rotatable, screw-free design with 3pin loop in and loop out, male and female plug, quick connection and can be easily changed to other power supplies. Either version would be a good choice for home.

     

     

    ADAYO flush mount lighting manufacturer

     

     

    Website: https://www.adayoled.com

    HUIZHOU FORYOU OPTOELECTRONICS TECHNOLOGY CO., LTD

    Add: Foryou Industrial Park Area B -- Plant NO.6 No.1North Shangxia Road,Dongjiang High-tech Industry Park, Huizhou City,Guangdong Province

    Tel: 0086-752-5300601  

    Fax: 0086-752-5300099

    Email: [email protected]

     

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