What is the difference between LED COB and LED SMD?

- Aug 22, 2020-

What is the difference between LED COB and LED SMD?


LED lights come in a variety of models. However, what is the difference between LED light COB and SMD?


SMD vs CBM: What is SMD?

SMD LED chips can have more than just two contacts (which makes it different from the classic DIP LED). There can be up to 3 diodes on a single chip, with each diode having an individual circuit. Each circuit would have one cathode and one anode, leading to 2, 4 or 6 contacts in a chip.

This configuration is the reason why SMD chips are more versatile (comparing SMD VS COB). The chip can include a red, green, and blue diode. With these three diodes, you can already create virtually any color simply by adjusting the output level.

SMD chips are also known to be bright. They can produce 50 to 100 lumens per watt.

SMD vs COB: What is COB?

 

COB chips typically have 9 or more diodes. COB chips also only have 1 circuit and 2 contacts, regardless of the number of the diodes. This simple circuit design is the reason for the panel-like appearance of COB LED light (SMD light, on the other hand, appears like a collection of smaller lights).


But unlike SMD, COB LED lights can’t be used to create color changing bulbs or lights. This is because there are only 2 contacts and 1 circuit. Multiple channels for adjustment are required to create the color changing effect. Because of this, COB LED lights are efficient in single-color applications, but not in more versatile technology.


Another aspect of the COB VS SMD LED Lights difference is in the use of energy. COB is known for better lumen-per-watt ratios and heat efficiency. This has a lot to do with the design of COB LEDs, and the cooling ceramic substrate of the chips.


Before, heavy duty technology like spot lights and flood lights made with LED were non-standard, because you’d need multiple LED sources to produce that kind of high lumen output.


But now, COB chips can produce a large amount of lumens with less energy. You can find it in all kinds of bulbs and applications, such as the flash of your mobile phone or point-and-shoot camera. Its range is higher with a minimum of 80 lumens per watt.