100w led setup questions

I want to setup 10 x 100w cob leds with active cooling. My question is if im running each 100w cob at 60w would these boost converters and this heatsink be suffecient. Im wanting to use one LM2596 adjustable buck converter and one Cooler Master Intel P4 socket 478 aliminum heatsink with fan for each 100w cob led. here are the links to the cob led, converter and heatsink. Thanks in advance for any help.

http://www.ebay.com/itm/111299756188?var=410291578046

http://www.ebay.com/itm/282226495470

http://www.ebay.com/itm/331989915908

Bump for response. My main concern is the heatsink. Seeing as im working on a very limited budget these specific heatsinks would fit into it best.

Would those led even grow anything? You'd be better off using a old PC PSU for getting 12v then using buck converter with a 30v driver

With a combination of cool white and warm white one's , from my research , it would work fine. Granted the more high end LEDs like cree would have a more precise spectrum for optimal growth. If good grows can be obtained from very inefficient HPS bulbs then I would imagine it could be done with these LEDs. My plan was to use a cpu powersupply to supply the power to each LM2596 which has the ability to adjust the voltage to each cob and since they probably wont all be from the same bin and will require different volts this would help to tweak each cob individually. Id like to say I have no real experience so most of what im planning is from research and I definetely dont claim to be an expert by any means. I really am hoping I can make this work but im not confident so I came here to get the experts advice on if this could work. I read about thermal runaway and I think that running each cob with a seperate adjustable converter will eliminate the chance of this happening. All of the buck converters would be powered by one power supply. I know this would mean a little more wiring but when something did go wrong with one of the cobs or converters I could just replace that one light without its failure affecting any of the other nine cobs.

steer away from those LEDs. ive used them and they burn out fairly quickly even in manufacturers recommended range. those boost converters look ok you'll have to plan out your wiring carefully. i can help you but i wouldnt pull the trigger on them quite yet. http://www.ebay.com/itm/Large-Big-Aluminum-Heatsink-Heat-Sink-Radiator-for-Led-High-Power-Amplifier-Amp-/172405120963?hash=item2824255fc3:g:koYAAOSwcUBYKm-6 these heatsinks are better suited for the job. i can vouch for them, they are what i am currently using. also make sure you use thermal paste. i assume you have a drill press and metal capable bits? a power drill wont get you far

http://www.ebay.co.uk/itm/272387289292?_trksid=p2057872.m2749.l2649&var=571324994865&ssPageName=STRK:MEBIDX:IT

plus heatsinks and or fans... won`t be the best but will be cheap and hard to blow up, dialing in a cowboy led hook up you need to burn it in and get the power just right... you can pop a few set ups till you get it right but with £1 to £10 chips who cares but when you pay 200 usd for a 1000w chip..... it starts costing money when you over load them

Thanks guys. I do have all the tools I need, I hope. If not I can hit up harbor freight. iHearall, are those heatsinks passive or would I still need to get a fan for them? Wow Konassure, I've never seen leds in that shape. I bet those would help spread out the light even better. My only concern would be what optics to use. I was planning on using these reflectors and collimator http://www.ebay.com/itm/400822561537

Botanicannibas said:

Thanks guys. I do have all the tools I need, I hope. If not I can hit up harbor freight. iHearall, are those heatsinks passive or would I still need to get a fan for them? Wow Konassure, I've never seen leds in that shape. I bet those would help spread out the light even better. My only concern would be what optics to use. I was planning on using these reflectors and collimator http://www.ebay.com/itm/400822561537

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I use fans on mine, i wouldn't recommend going without fans. If you want passive heatsinks hit up some of the high end dealers that rep on thos site. I think after fans cost they come out to be the same price. Like 14$-20$ each. You could do do the coolant filled sinks on ebay that are made for these particular leds.

Heatsink should be priority one before leds. Yiu can make garbage leds last with proper a sink. Look into citizen led and similar as they are better un spectrum amd design for the same price range. Pretty much hit up the flooded led threads, they sound like die hard idiots but are actually preaching logic.

One more question. I've looked everywhere and can't find out what type of power supply best to use. Basically I want one power supply to power all ten buck boost converters. What voltage and amperage power supply would I need to power all ten of the buck converters? The buck converters can take an input voltage of 3v to 40v. Can I use any 12v power supply to power all ten? I just started researching the electrical side of it and I still don't understand how to power all of them with one power supply. Thanks again for all the help.

Here is the maths.
Those 3amp buck converters wont work with the 20-100W chips since they want 32 - 36v
The 10W chip is the only one that takes a voltage that would work in its range (9-12V).

I've watched a few YouTube videos on these converters and read a few different auctions on ebay. Although some say only 30v max output they can actually put out 35v. Would this mean well power supply work?
https://www.superbrightleds.com/moreinfo/power-supplies/mean-well-led-power-supply-se-series-100-1500w-enclosed-power-supply-12v-dc/2246/
I was hoping for something cheaper and would really like to use a computer power supply but I'm not sure how to center all ten buck converters to it.

You could get

Botanicannibas said:

I've watched a few YouTube videos on these converters and read a few different auctions on ebay. Although some say only 30v max output they can actually put out 35v. Would this mean well power supply work?
https://www.superbrightleds.com/moreinfo/power-supplies/mean-well-led-power-supply-se-series-100-1500w-enclosed-power-supply-12v-dc/2246/
I was hoping for something cheaper and would really like to use a computer power supply but I'm not sure how to center all ten buck converters to it.

Click to expand...

Eh that guy is right. You have shown a few buck converters, not boost converters. Buck converts a DC voltage to a pulsing square wave and uses the frequency to create circuit impedence and you get a low voltage high current output.
A biost converts in the same manor but different organization and you get a high voltage low current output. Anyway.


With these listed... This would turn a 12v supple into a 4-12v supply...


So that being said... If you have 10ct 30v chips then you have the potential for 2 rows of 5 chips. 5 chips will max between 150v and 175v DC when in series.

If you placed the other series of 5 chips in parallel you will need 6-7amps to reach this voltage.

Current is only used as needed. Voltage is your worry if you know your supply has enough current.

Lastly, an AC line has an rms value of 120vac and when rectified with a bridge rectifier, it will create a 120v dc supply that peaks at 170v 120 times a second. This is because it is in 60hz and has two peaks per cycle. 60×2.

Ok, so your actually within range of possibly not blowing up chips by simply using a bridge rectifier. Which may cost a hefty 2$-5$. You want a goood one. Like 1000v 10+amp capable.