Question about my setup and with CXB3590s...

aquanaut

aquanaut

Well-Known Member
Hi, if I plan on 2x CXB3590s 36v for now and plan on 2x more down the road. Can I use a HLG-185H-C1400B?

And if so, would I wire them in series, including when I get the 2x more later?

I'm asking because I see the listed voltages are 72 ~ 143vDC. And if the minimum I needed to sink was 72 or something.. I'm a new to COBs so excuse my ignorance.

Thanks!
 
Airwalker16

Airwalker16

Well-Known Member
aquanaut said:
Hi, if I plan on 2x CXB3590s 36v for now and plan on 2x more down the road. Can I use a HLG-185H-C1400B?

And if so, would I wire them in series, including when I get the 2x more later?

I'm asking because I see the listed voltages are 72 ~ 143vDC. And if the minimum I needed to sink was 72 or something.. I'm a new to COBs so excuse my ignorance.

Thanks!
Click to expand...
I don't know if there'd be enough forward voltage there to light it up.
 
V

VegasWinner

Well-Known Member
You need more than two cobs. I would not wire in parallel as that is recommended by cree. Get a 50w driver for each cob for $15 on ebay with 700 - 1000 ma and save up for more cobs and single driver that is what I did also used passive hs peace.
Vegas
 
weed-whacker

weed-whacker

Well-Known Member
VegasWinner said:
You need more than two cobs. I would not wire in parallel as that is recommended by cree. Get a 50w driver for each cob for $15 on ebay with 700 - 1000 ma and save up for more cobs and single driver that is what I did also used passive hs peace.
Vegas
Click to expand...

somewhat agree with this

I think u are better off getting 3 cobs now(to run on the 185) or a driver or two to run 2 cobs which u could get another one of later or use it for a veg light


i think plc has smh cheap like

http://www.pacificlightconcepts.com/product/50w-lsd-power-driver/


or

http://www.pacificlightconcepts.com/product/lsd-power-200w-driver-dcoutput1-4amp145v/
 
R

RhoBotic

Member
The HLG-185 will run 4 COBS, but not at 1400ma. They can supply the voltage to do so but not the power output. P = VI, so 72v * 4 = 288v (they can supply up to 400 odd), but you need to consider the max power rating, which is 185w (in reality you it to be 70-75% of that so 135 ideally).

HOWEVER if you calculate power at that voltage you get 1.4a * 288v = 403w, so well out of range. In fact you don't want to be using the 72v version of the cree cob at 1.4a anyway, the bridgelux vero will perform better running this hot anyway. The benefit of the cree COBs is how efficient they are at low drive currents. Even if you use the 36v version you'll be out of the range of the power handling capablility of this drive.

You can run 4 x 36v CXB3590 @ 1050ma giving 151w (roughly)

Also if you're not experienced with such things be REALLY careful with any exposed wire with these drives, these are hih voltage drives and will kill you is you get a shock from the DC side!
 
BOBBY_G

BOBBY_G

Well-Known Member
RhoBotic said:
The benefit of the cree COBs is how efficient they are at low drive currents.
Click to expand...
well thats true with any cob (or mono), not just cree. most cobs scale relatively similar with current and there are a couple competitors like vero v7 and citizen clu058 that are more efficient at lower currents (and cheaper than cree as well)
 
sixstring2112

sixstring2112

Well-Known Member
RhoBotic said:
The HLG-185 will run 4 COBS, but not at 1400ma. They can supply the voltage to do so but not the power output. P = VI, so 72v * 4 = 288v (they can supply up to 400 odd), but you need to consider the max power rating, which is 185w (in reality you it to be 70-75% of that so 135 ideally).

HOWEVER if you calculate power at that voltage you get 1.4a * 288v = 403w, so well out of range. In fact you don't want to be using the 72v version of the cree cob at 1.4a anyway, the bridgelux vero will perform better running this hot anyway. The benefit of the cree COBs is how efficient they are at low drive currents. Even if you use the 36v version you'll be out of the range of the power handling capablility of this drive.

You can run 4 x 36v CXB3590 @ 1050ma giving 151w (roughly)

Also if you're not experienced with such things be REALLY careful with any exposed wire with these drives, these are hih voltage drives and will kill you is you get a shock from the DC side!
Click to expand...
Lol,did you even readthe first post?
He is using 36v cobs.and its very close to working with 2 of them on a mw 185 @1400ma.to the op,as vegas mentioned get a 3rd cob and it will work better.then add another later.or buy a smaller driver.
 
Airwalker16

Airwalker16

Well-Known Member
RhoBotic said:
The HLG-185 will run 4 COBS, but not at 1400ma. They can supply the voltage to do so but not the power output. P = VI, so 72v * 4 = 288v (they can supply up to 400 odd), but you need to consider the max power rating, which is 185w (in reality you it to be 70-75% of that so 135 ideally).

HOWEVER if you calculate power at that voltage you get 1.4a * 288v = 403w, so well out of range. In fact you don't want to be using the 72v version of the cree cob at 1.4a anyway, the bridgelux vero will perform better running this hot anyway. The benefit of the cree COBs is how efficient they are at low drive currents. Even if you use the 36v version you'll be out of the range of the power handling capablility of this drive.

You can run 4 x 36v CXB3590 @ 1050ma giving 151w (roughly)

Also if you're not experienced with such things be REALLY careful with any exposed wire with these drives, these are hih voltage drives and will kill you is you get a shock from the DC side!
Click to expand...
185 Is more like a 200-210W driver.
 
sixstring2112

sixstring2112

Well-Known Member
mw hlg-185h-c1400b
constant current region=71v -143v (note 6)
rated power=200.2w
current adjust range 700-1400ma
ƒŽŒ‘‘‡‚€’€‚•€Ž ‰ƒŽŒ‘‘‡‚€’€‚•€Ž ‰https://www.trcelectronics.com/ecomm/pdf/hlgc185.pdf

from the looks of this you could in fact drive 2 x 36volt cobs but your so close to the border i personally would not do it. now you can run 2 x 72volt cobs on this driver nicely for 100.8w each but you better have your heatsinks sized right. @robincnn has a sweet deal on those 72v cobs right now also ;)
and yes you should wire them in series.
 
Rahz

Rahz

Well-Known Member
At 1.4 amps the average cob voltage will be low enough to put 4 on the HLG-185H-C1400. This will also put it slightly under the 72v min. It's very possible 2 will light up. 3 would be a sure bet.
 
Airwalker16

Airwalker16

Well-Known Member
Rahz said:
At 1.4 amps the average cob voltage will be low enough to put 4 on the HLG-185H-C1400. This will also put it slightly under the 72v min. It's very possible 2 will light up. 3 would be a sure bet.
Click to expand...
I wish this driver would do the same as it's Pairui equivalent and run 5 cobs.
 
Airwalker16

Airwalker16

Well-Known Member
Rahz said:
Still pretty sweet rig you built.
Click to expand...
Hey thanks. Did you know that I was blessed by the heavens with a win on the ecosunlite? Which just so happens to have EXACTLY what you told me i should add PLUS Red and Blue Monos like I wanted.
 
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