Help me build a LED

These are the parts I would like to use but can't find them online for quanities less than 100
White LED:
CXA3590-0000-000R0YZ227F

Where can i buy those? I would like to use about 4 of those and run them at 100w each what do I need to do this? I understand they will need to be soldered together on some type of heat sink and I believe I can use a thermal adhesive paste to glue them onto a heat sink? thanks for the help

DatasheetsCXA3590 Series
Mfg Application NotesCXA Family Soldering/Handling
Standard Package 100
CategoryOptoelectronics
FamilyLED Lighting - COBs, Engines, Modules
SeriesXLamp® CXA3590
Packaging Tray
ColorWhite, Warm
CCT (K)2700K 4-Step MacAdam Ellipse
Wavelength-
TypeChip On Board (COB)
ConfigurationSquare
Flux @ 85°C, Current - Test7668 lm (7390 lm ~ 7945 lm)
Flux @ 25°C, Current - Test-
Current - Test1.2A
Voltage - Forward (Vf) (Typ)77V
Lumens/Watt @ Current - Test83 lm/W
CRI (Color Rendering Index)93
Current - Max1.8A
Viewing Angle115°
Thermal Resistance of Package-
Features-
Size / Dimension34.85mm L x 34.85mm W
Height1.70mm
Light Emitting Surface (LES)30.00mm Diameter

This is the closest that I know of that is available
http://www.digikey.com/product-detail/en/CXA3590-0000-000R00AD27F/CXA3590-0000-000R00AD27F-ND/4501389

You could power 2 of them with an HLG-185H-C1050A and each would dissipate 90W @ 1150mA @ 33.3% efficient. It would be dimmable to 480mA where they would dissipate about 33W each @ 40% efficiency.

You could mount them on these:
http://www.amazon.com/ARCTIC-Alpine-11-Plus-Cooler/dp/B00606OHQQ

Thanks supra that's a solid plan, the CRI of those is 80 and the ones I would like is 93 are the ones I want coming out soon you think?

What type of thermal glue would I need?

Would two of them fit on that heat sink?

I been looking at http://www.rapidled.com/6-x-10-black-anodized-aluminum-heat-sink/ as a heat sink but I am not sure if yours is better it definitely is better for my wallet

I use a thermal paste, Prolimatech PK3. Much better thermal transfer than thermal adhesive. It creates a strong vacuum, the COB will not come off. I tape the corners with kapton so it cannot slide sideways. Lots of diyers are using COB holders. I am not sure if they are in stock for the 3590 though.

Since you will be running a lot of power, the quality of the thermal interface becomes very important. I would highly recommend sanding and polishing the aluminum surface of the heatsink to 1000 grit US.

Thanks man a bunch I am going to try to make this should I use your heat sink ? Would 2 of them fit on your heat sink and not be too hot? Should I use the heat sink I linked? I'm sorry for the noob questions I have never made a light before and thank you again

You would need one heatsink/fan for each COB. That also allows you to spread them out for better coverage and allows you to keep them closer to the canopy so you avoid the need for lenses or reflectors.

If you prefer them all mounted onto one unit you can order extruded heatsink from HeatsinkUSA and they will cut it any length for you. Then you can cool it with a single fan. You would be dealing with 360W of dissipation so I would recommend 14400 cm² total surface area to keep them running cool.

The heatsink you linked is nice but it would only be good for one COB and does not come with a fan so it would be cheaper and just as effective to use the Arctic CPU coolers.

Ok thanks how do I hang those?

I drill holes in the sides of the heatsink and attach zinc jack chains (Walmart). That gives you a lot of adjustability in every direction and is very simple.

I want something that's going to be really powerful so would it be smarter to use more cob's on a larger heat sink I want this light to cover a 3x3 area with very strong penetration into the canopy.

http://www.rapidled.com/drilled-tapped-6-x-20-black-anodized-aluminum-heat-sink/ this one is twice the length would it work for both COB's on that one heat sink with maybe a second fan on it?

At 33% efficiency I would recommend about 40W/ft² so you would want about 360W, a perfect match for your canopy

Yes I believe you could run a pair on that heatsink especially if you use a 140mm fan which will blow air into all the fins. But, it would be alot cheaper and just as effective to use the CPU coolers and you would get better spread and adjustability. They really are amazing because they have so much surface area and they use high quality fans very efficiently.

I have run CXA3070s on those coolers dissipating 90W and it was barely warm to the touch, very impressive. I also use them for 5000K CXA3590s that are vegging, but they are only running at 20W so I have the fan barely spinning (5V)

Damn Supra. You really know your shit with this stuff. I'd like to learn more but you guys may as well be speaking Japanese. Think I need to go with something that can be plugged in right out of the box.

Good luck with your project Yoda

Thnx SG, ya DIY isnt fun for everyone but it is great for tinkerers. If you get the itch to try it there are lots of guys in this forum that will give you a hand.

Supra is one of the best on these forums hands down and sailor too they both have put a huge amount of information for us to soak up sometimes very difficult to read

SupraSPL said:

Thnx SG, ya DIY isnt fun for everyone but it is great for tinkerers. If you get the itch to try it there are lots of guys in this forum that will give you a hand.

Click to expand...

I'm sure there's a lightbulb moment (ha!) for everyone learning something new. I was like that with organics. Once I wrapped my head around it it really lit a fire under my ass and I just couldn't read enough about it. I found myself laying in bed at night thinking about worms and microbes. lol

It could be the same thing with DIY LED's, but I suspect that the learning curve would be much bigger for someone like myself when it comes to electronics.