What are SMD and COB
SMD and COB are both very matured LED technology. they are mainly for different product and application.SMD and COB are frequently confused，here briefly introduce what are the two technology and the comparison of them.
SMD: it is short for Surface Mounted Devices, meaning: surface mount device, it is a component of SMT (Surface Mount Technology ) .The SMD lamp is the use of this technology beads package.
COB: is short for Chip on Board.because the IC supplier in LCD control and related chip production is reduced QFP (a kind of encapsulation mode SMT parts) package production. Therefore, products in the traditional SMT mode is gradually replaced in the future. The COB lamp is the use of this technology beads package.
In general:
|
item |
SMD |
COB |
|
production efficiency |
low than COB |
after the station dispensing, separation,
spectrophotometry, the packing efficiency is
higher than traditional SMD
|
|
Thermal resistance |
High resistance than COB
|
Low thermal resistance
|
|
Light quality |
There are points of light, glare on Discrete
device combination
|
Large Visual angle and easy to adjust, reduce
the loss of light refraction
|
|
Application |
LED need to patch first,And then through the
reflow way fixed on the PCB board
|
Without mounting and reflow soldering process,
the COB light source applied directly on the lamp
|
From the form,It is easy to see that compared to COB and SMD, COB has a great advantage than SMD.now let me introduce more COB information for you.
COB is mainly for small light, especially for the indoor small power light. This is the right field for COB.
http://www.liteharborfactory.com/Line-Voltage-Track-Light/14_588_COB-LED-track-pendant-lighting.html
But now COB is also wildly used for high bay and floodlight in China.Therefore you can see all the cheap made in Liteharbor high bay and flood light are with COB.
http://www.liteharborfactory.com/Flood-Light/38_353_LED-flood-lighting-20w-china-supplier.html
http://www.liteharborfactory.com/high-bay-light/8_349_led-bay-light-cob-led-200w-china-supplier.html
Generally, COB below 100w is acceptable, but for higher power, it may look good in the beginning, but they have much higher risk of big decay and failure after long time running, due to the concentrated heat.
200w COB high bay, is 90% from China, and impact market only by the low price, with no design, no good performance, no certificate.
For supermarket, good design and looking much be very important, from view of this, we Liteharbor definitely the best one.
Welcome to visit our website for more COB light information:http://www.liteharborfactory.com/
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