DiY LEDs - How to Power Them
- Thread starter SupraSPL
- Start date
Rahz
Well-Known Member
So you are running the CXBs in parallel?
I like parallel because the lamp continues to run if a COB goes bad (it also makes for easy troubleshooting). If it's a bad idea and series is my only choice I might lean towards V29s on the HLG-240 even though it wouldn't be as efficient. I need to think about that though... the lamp I'm designing is for a 2x2. 4 V29s @ 1.4A which seems like a lot of light... more than retail offerings provide for the same area. The CXBs would be overkill... not that I'm opposed to it. Decisions decisions.
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Greengenes707
Well-Known Member
No. I don't and will not run any of the larger cobs(3070, 3590, or vero29) in parallel. Always series. In parallel if one dies...the others will get its current. So if you don't catch it right away...your other cobs will be getting driver harder than you planned.
A bit over kill in that space.
You could go for the hlg185-c1050. Probably be perfect end wattage for you space. And will drive all 4 no problem.
Rahz
Well-Known Member
The plan was to design the lamp so it would operate at typical temps even with an emitter loss, so that wouldn't be an issue... but that's not the reason you cited for avoiding a parallel setup, so point taken.
But I'm confused on your recommendation... the non C version would power a series circuit correct? HLG-185H as opposed to HLG-185H-C. I had matched the HLG-240H-42 (21-42V 5.72A) with 4 Vero 29s in series.
But I'm confused on your recommendation... the non C version would power a series circuit correct? HLG-185H as opposed to HLG-185H-C. I had matched the HLG-240H-42 (21-42V 5.72A) with 4 Vero 29s in series.
nogod_
Well-Known Member
In series you stack voltage. If you want to power 4 x 3070s in series you need a driver that can handle 144 volts. The hlg-185h-c1050 maxes out at 170 volts.
This means you are operating at about 85% of the driver's capacity. If you refer to the data sheet for the meanwell you will see that at 85% load you can expect the driver to run at 94% efficiency.
This means you are operating at about 85% of the driver's capacity. If you refer to the data sheet for the meanwell you will see that at 85% load you can expect the driver to run at 94% efficiency.
Rahz
Well-Known Member
Thank you.
So I'm going to have trouble getting a driver for the 4 Vero29s in series unless I can get ahold of an HLG-240H-C1400
But can run the 4 CXB3070s in series with the HLG-185-H-C1400
I'm not necessarily opposed to that much light, I would have been happy with the V29s output @ 1.4A
So I'm going to have trouble getting a driver for the 4 Vero29s in series unless I can get ahold of an HLG-240H-C1400
But can run the 4 CXB3070s in series with the HLG-185-H-C1400
I'm not necessarily opposed to that much light, I would have been happy with the V29s output @ 1.4A
nogod_
Well-Known Member
My bad forgot you were using veros. Same thing more or less with v29. It will consume 38w @ 1050a/36v. 36v x 4 = 144v
hlg-185h-c1050 is 190v max so its suited to run up to 5 veros
38w/sqft. I dont think you really need much more.
hlg-185h-c1050 is 190v max so its suited to run up to 5 veros
38w/sqft. I dont think you really need much more.
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SupraSPL
Well-Known Member
For posterity, there is a typo on some of the retailer sites, the HLG-185H-C1050 maxes at 190-191V.
I agree, that is some great intensity
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nogod_
Well-Known Member
Rahz
Well-Known Member
If anyone was curious, I talked to a distributor about the HLG-240H-C. Was told they may have been special manufactured but as they are not listed on Meanwell's website it's not possible to order them. However, after typing in the hypothetical address for the part, up pops the datasheet.
http://www.meanwell.com/search/hlg-240h-C/HLG-240H-C-spec.pdf
Maybe it is a new product that hasn't made it to distribution yet?
Anyway, unless/until it's available the 4xV29@1.4A lamp is on hold. 2 HLG-120H-C could be used but after factoring in the price it seems the Cree option is a better deal.
http://www.meanwell.com/search/hlg-240h-C/HLG-240H-C-spec.pdf
Maybe it is a new product that hasn't made it to distribution yet?
Anyway, unless/until it's available the 4xV29@1.4A lamp is on hold. 2 HLG-120H-C could be used but after factoring in the price it seems the Cree option is a better deal.
nevergoodenuf
Well-Known Member
I would like to upgrade to the new Vero2 or the CXB's. I already have the drivers and heatsink. I need 2 COB's for this driver in the 4000k range. What is the best choice for this driver.
ReeferDance
Well-Known Member
And a Vf of 36 is tough to match up to a COB when you are putting out ~2.45 Amps.
sforza
Well-Known Member
Too many amps to run CXB's efficiently and not enough volts to run more than one. I have learned the hard way that there is no substitute for reading the posts of those who know what they are doing. SupraSPL has made post after post explaining what drivers to use with which COBs to run an efficient system. There are plenty of very knowledgeable posters about DIY LEDs on this board, but if you are only going to read one poster, read SupraSPL.
beppe75
Well-Known Member
is it possible guys to drive 2 cxb3590 from a hlg120h-c1050?
the driver has a max output voltage of 148v but i don't know if the cxb3590 will run @ 77v or less at 1050ma?
Any other option to drive these 2... even from a single driver,,, though one that coud drive 2 is best option.
example running 2 from hlg120-c700?
i'm a little bit lost with all these data even though i'm slowly getting there
thanks.
the driver has a max output voltage of 148v but i don't know if the cxb3590 will run @ 77v or less at 1050ma?
Any other option to drive these 2... even from a single driver,,, though one that coud drive 2 is best option.
example running 2 from hlg120-c700?
i'm a little bit lost with all these data even though i'm slowly getting there
thanks.
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alesh
Well-Known Member
Yes, (2) CXB3590s and HLG120H-G1050 are a good match.is it possible guys to drive 2 cxb3590 from a hlg120h-c1050?
the driver has a max output voltage of 148v but i don't know if the cxb3590 will run @ 77v or less at 1050ma?
Any other option to drive these 2... even from a single driver,,, though one that coud drive 2 is best option.
example running 2 from hlg120-c700?
i'm a little bit lost with all these data even though i'm slowly getting there
thanks.
EfficientWatt
Well-Known Member
In my understanding, the HLG120H-C1050 caps at 148V, and 2 CXB3590 ask for +-152.6V so not sure what would happen but it won't run 100% at max output ...
I myself wanted to power 4 CXB3590 off of 1 HLG 185H C700B which has the same cap problem ( 286V for driver, 306.7 for 4 CXB2590 .. )
Maybe someone more knowledgeable can clarify this for us
I myself wanted to power 4 CXB3590 off of 1 HLG 185H C700B which has the same cap problem ( 286V for driver, 306.7 for 4 CXB2590 .. )
Maybe someone more knowledgeable can clarify this for us
beppe75
Well-Known Member
Alesh says we can...In my understanding, the HLG120H-C1050 caps at 148V, and 2 CXB3590 ask for +-152.6V so not sure what would happen but it won't run 100% at max output ...
I myself wanted to power 4 CXB3590 off of 1 HLG 185H C700B which has the same cap problem ( 286V for driver, 306.7 for 4 CXB2590 .. )
Maybe someone more knowledgeable can clarify this for us
maybe the cxb3590 @1050 just draw less than 77v...
lest say one cxb 3590 @ 1050 draws 72v-74v that would make the hlg120h-c1050 a perfect match....
otherwise we'll have to drive them @ 700ma and get less power for better efficiency...
I'm not sure if this is correct though...someone need to confirm this for us @EfficientWatt
alesh
Well-Known Member
It's wrong understanding thenIn my understanding, the HLG120H-C1050 caps at 148V, and 2 CXB3590 ask for +-152.6V so not sure what would happen but it won't run 100% at max output ...
I myself wanted to power 4 CXB3590 off of 1 HLG 185H C700B which has the same cap problem ( 286V for driver, 306.7 for 4 CXB2590 .. )
Maybe someone more knowledgeable can clarify this for us
CXB3590 doesn't need more than 73V @1050mA. It's 146V for 2 pcs, well within range of HLG120H-C1050.
