led cob light pull apart

[Gazza2001au]

 

Karma often bites people on the ass, Have u heard the saying?

[SOOTY]

Karma often bites people on the ass, Have u heard the saying?

its just a meme gaz.... dont go flushing anything just yet

[ozbaz]

In darwin for 2 weeks, anyone have a wkr they can give me?

 

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[Grow Fresh LED]

? lost here the light only pulls 92w and could pull 200w and a shit tin brighter.

not sure why but my msg didn’t post. I asked what wattage is the driver?

 

 

Cheers, Porcha

 

I do not disclaim anything about this message. I'm quite proud of it, really!

[micmac]

who stole my tiggy

 

 

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[Allotropy]

dont panic it's organic

[micmac]

N3ro how are u going to pull 200watts from a 70-85volt 520Ma driver? Your cobs are roughly 50watts

70 x .52 = 36.4watts (minimum)

85 x .52 = 44.2watts (maximum)

 

this is per cob

 

to pull 100watts per cob u would need to upgrade the driver but it is hard to tell weather your cobs are wired in parallel or series, based on my calculations i would have a stab and say they are wired in parallel meaning to run 1x 100watt cob from your light u would need to double your output cords from the driver to the cob ++ and - - instead of + -, + -

sorry you are right

12x.05= 0.6 watts

Missed a zero .05 is 500 milliamperes

 

So 12 x 0.52= 0.624 watts

Those the figures I was given

And yes it would be 12 watts if 1 amp

The rest of it I got no idea but these figures are 100%

 

 

 

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[micmac]

Being multi-chip packaged, the light emitting area of a COB LED can contain many times more light sources in the same area that standard LEDs could occupy resulting in a greatly increased lumen output per square inch.

 

COB LEDs use a single circuit with just two contacts to energize the multiple diode chips it houses. This results in fewer components required per LED chip for proper operation. Furthermore, the reduced components, along with the elimination of the traditional LED chip structure packaging, can reduce the heat generated from each LED chip. The ceramic/aluminum substrate of COB LEDs also acts as a higher efficiency heat transfer medium when coupled to an external heatsink, further lowering the overall operating temperature of the assembly. When mounting a COB to a heatsink, care must be taken to choose a heatsink capable of dissipating the heat generated to enable a COB to be used to their full potential. In the long run, the proper heat dissipation increases efficiency and lowers failure rates.

 

Another aspect of COB LEDs that reduces failure rates is the fact that spot soldering of the individual LED chips is not necessary as each chip is directly mounted onto the substrate. The smaller amount of welding points results in lowering the rate of failure.

 

Light loss is decreased significantly and viewing angle is increased both due to the fact that lenses and other traditional LED packaging parts are no longer in place when using COB LEDs.

 

The disadvantage of COB LEDs

 

COB LEDs do have one disadvantage in that they currently are available in a limited variety of colors (blue, green, pink, red, cool white, neutral white, and warm white).

 

Applications for COB LED lighting

 

The application possibilities for COB LEDs encompass a wide range. While these devices could be used for higher output general lighting, the primary use for COB LEDs would be as solid-state lighting (SSL) replacements for metal-halide lamps in applications such as high-bay lighting, street lights, and high-output track lights and downlights.

 

Figure 2 shows the basics required to get a COB LED powered up. This illustration uses an Excelsys Technologies LXC42-1050SW driver to provide a constant 1.05 A to a Citizen CLU721 Series COB LED.

 

Image of basic Citizen COB LED circuit block diagram

 

Figure 2: Basic COB LED circuit block diagram (Diagram drawn using Digi-Key Scheme-it)

 

 

With an input voltage range of 90 to 305 VAC, the driver is capable of supplying up to 1.05 A to the COB LED (which, in this case, has a test current of 1.05 A and a maximum rating of 1.38 A) and will not be damaged by over-driving it. Additionally, when drivers are run closer to their maximum capacity (in this example 39.48 W out of a 42 W maximum), they operate with a higher efficiency, contributing towards less losses in the overall system.

 

 

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[micmac]

Basic COB Application-1

Excelsys Driver

 

 

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[micmac]

Geezes this hurting my head haven't done calcs for ages , used hate working out the maximum demand

 

 

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Edited October 10, 2017 by micmac