Type of LED Chip in our products
This article on “LED Chip” is Part 2 of a 3 Part Series on components of a LED Light.
In this article, we will explain the similarity and differences of the two common LED chip in the market, namely Surface Mount Diode (SMD) and Chip On Board (COB).
What is a LED Chip and the importance of it?
A LED chip has multiple diodes mounted on it, and diodes are the one that emits light when electrical charge flows through the chip. LED chip is a core component of a LED light and its main function is to convert electrical energy into light.
Surface Mount Diode (SMD)
A Surface Mount Diode (SMD) chip can be found on most LED in the market today. It’s favoured for its versatility as each individual diode mounted on SMD has its own circuit and connecter ports. SMD is able to support LED that require colour changing capabilities, such as LED strip and downlights.
As mentioned, that each diode has it own circuit and connector, therefore diodes on SMD can be adjusted independently. This is important to create colour changing effect on LED lights, as the brightness of each diode can be controlled to give out the colour that users require.
SMD comes in various sizes too, to name a few such as SMD 5050, SMD 3528 and SMD 2835. The numbers actually denote the size of the chip, therefore a SMD 3528 chip will be 3.5mm by 2.8mm.
Chip On Board (COB)
Chip On Board (COB), has a simpler circuitry design compared to SMD. A COB only has one circuit and two connector port on the entire chip, regardless of the number of diodes mounted, unlike the SMD where each individual diode has its own circuit and connecter ports.
And compared to SMD, COB is able to hold up more diode. A COB typically holds up to 9 or more diode on one chip, thus creating a panel like effect, whereas a SMD appears like a collection of smaller lights.
Although COB does not possess the colour changing capability like SMD, but it has a higher lumen-per-watt ratio and better heat efficiency, due to the circuitry design of COB and the cooling ceramic substrate of the chips. It’s also more powerful as compared to SMD chip, because COB chips are able to produce larger number of lumens with lesser energy, therefore it is used for heavy duty lights like Spotlight, Flood Lights and High Bay Lighting.
Difference between SMD & COB
Technical differences aside, there is a major difference on how lights are being emitted between SMD and COB chip.
COB has a larger surface area of the emitting source, creates a broader, softer and diffused light source compared to a SMD of equal lumens. SMD on the other hand, will have a more concentrated and higher glare due to the layout of chips on the LED. This in turns give it higher intensity as compared to a COB.
Hope the article above has given you a better understanding of the type of LED chips that are commonly found in LED products and has given you clarity on what to look out for in the future when buying lights.
At Paragon, we source our chips from various brands, as we believe in selecting the best possible chip in the market, to create the intended end result that we have planned for our LED lights.
Do click here for more lighting options: www.paragon-led.com