Difference between COB Lights and SMD Lights

LED lights are constantly being improved for better use, greater versatility and more efficient use of electricity. Compared to traditional incandescent lights, different models of LED lights are very popular, mainly because they can use less energy and last about 25 times longer. This article will focus on difference between COB light and SMD light.

SMD vs. COB: What is an SMD?

SMD or "surface mount device" LEDs are the most common LEDs on the market. LED chips are permanently fused to a printed circuit board and are popular because of their versatility. You can find it in light bulbs and light strings, and even in notification lights on cell phones.

SMD LED chips come in a variety of sizes. SMD LEDs can accommodate chips with complex designs, such as the 5mm wide SMD 5050. on the other hand, the SMD 3528 is 3.5 mm wide. SMD chips are small, almost approaching the design of a flat square computer chip.

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One of the distinguishing features of SMD LED chips is the number of contacts and diodes they have.

The SMD LED chip can have more than two contacts (which makes it different from the classic DIP LED). There can be up to 3 diodes on a chip, each with a separate circuit. Each circuit will have a cathode and an anode, resulting in 2, 4 or 6 contacts in the chip.

This configuration is what makes the SMD chip more versatile (compare SMD to COB). The chip can include red, green and blue diodes. Using these three diodes, you can create almost any color by adjusting the output level.

SMD chips are also known for their brightness. They can produce 50 to 100 lumens per watt.

SMD vs COB: What is a COB?

One of the latest developments in LED, COB or "chip on board" technology is more efficient use of energy. Like SMDs, COP chips have multiple diodes on the same surface. But the difference between COB and SMD LED lights is that COB LEDs have more diodes.

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

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Unlike SMDs, however, COB LED lights cannot be used to make color changing bulbs or lights. This is because there are only 2 contacts and 1 circuit. Multiple adjustment channels are needed to create the color changing effect. Because of this, COB LED lights are effective in monochrome applications, but not in more general purpose technologies.

Another difference between COB and SMD LED lights is the use of energy.COBs are known for their better lumens per watt ratio and thermal efficiency. This has a lot to do with the design of COB LEDs, and the ceramic substrate used to dissipate heat from the chips.

Previously, heavy-duty technologies such as spotlights and floodlights made from LEDs were non-standard because you needed multiple LED light sources to produce this high lumen output.

But now, COB chips can produce a lot of lumens with a lot less energy. You can find it in a variety of bulbs and applications, such as cell phone flashes or dumb cameras. It has a higher range, with a minimum of 80 lumens per watt.

For more information about the difference between COB lights and SMD lights, welcome to contact us at +86 75 2960 6860 or write to us at info@getiangroup.com. We will be happy to help you out!

 

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