Driver help please

giggywatts

giggywatts

Well-Known Member
I'm trying to find a driver that matches or comes close to the drivers i'm using. The old drivers are the nl 50w-hv350 45w but can't seem to find anything close to these. I'm running two vero 18 gen7 cobs each driver. Thanks in advance.
 
giggywatts said:
I'm trying to find a driver that matches or comes close to the drivers i'm using. The old drivers are the nl 50w-hv350 45w but can't seem to find anything close to these. I'm running two vero 18 gen7 cobs each driver. Thanks in advance.
Click to expand...
Need to know what vero gen 7's you are running they have a three versions C,s D,s and B's they run at different voltages so important to know what ones you have for making a driver selection. Also how many total veros do you have ? might be able to run one driver for all your LEDs which is usually cheaper.
 
Model NL50W-HV350
Material Plastic
Color Black + red
Quantity 1
Total Emitters 0
Power 45 W
Color BIN No
Rate Voltage AC 100~240 V
Application LED driving power supply
Features Input: AC 100~240V, 50 / 60Hz; Output: 65~130V, 300mA
Packing List 1 x LED driving power supply

@giggywatts the APC-35-350 put out 28 vdc to 100 vdc at 350MA. This should work, assuming you have 36 volt versions of the Vero 18 cobs.


https://www.digikey.com/products/en/power-supplies-external-internal-off-board/led-drivers/137?k=&pkeyword=&sv=0&s=69709&pv1120=273&sf=0&FV=2dc1675,ffe00089&quantity=&ColumnSort=0&page=1&stock=1&pageSize=25
 
I have the vero 18 d two to each driver. What i have is three 5.4 x 22" usa heatsinks with four cobs each. Two 3000k and two 3500k each total 12 cobs and six drivers. Each one is fan cooled. In a 2'x2' box and they work great. I want to upgrade my other box by adding four more vero 18's. To go along with a area51 rw75 and two vero 18's that are drove by a meanwell lpc-60-1400 driver each if i remember right.
 
Isawthelight said:
Model NL50W-HV350
Material Plastic
Color Black + red
Quantity 1
Total Emitters 0
Power 45 W
Color BIN No
Rate Voltage AC 100~240 V
Application LED driving power supply
Features Input: AC 100~240V, 50 / 60Hz; Output: 65~130V, 300mA
Packing List 1 x LED driving power supply

@giggywatts the APC-35-350 put out 28 vdc to 100 vdc at 350MA. This should work, assuming you have 36 volt versions of the Vero 18 cobs.


https://www.digikey.com/products/en/power-supplies-external-internal-off-board/led-drivers/137?k=&pkeyword=&sv=0&s=69709&pv1120=273&sf=0&FV=2dc1675,ffe00089&quantity=&ColumnSort=0&page=1&stock=1&pageSize=25
Click to expand...
Thank you very much i will look into them. If i understand right 10 watts lower per set? Having a hard time wrapping my brain around this today.
 
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If you run vero 18 D,s @ 350ma it is only like 9 and a half watts a vero. The ones you are driving @ 1400ma are running at 42 watts a piece. Pretty big difference in the two. You sure the veros were on a 300ma driver because thats only 8 watts a vero. The driver Isaw picked out for you would actually run the veros A watt more then the driver you posted.
 
Ok rahz told me 18w each at 9w each heat when i asked about heatsinks awhile back and very well may have misunderstood him. Like i said i'm still trying to learn. I know i cut two bars off before i open that box cause it will blind you. The 12 vero 18's are putting the rw75 and the two vero 18 setup to shame.
 
Last edited:
Will that meanwell run two vero 18 in series? It may be my old brain but it doesn't add up to me for some reason.
 
giggywatts said:
Will that meanwell run two vero 18 in series? It may be my old brain but it doesn't add up to me for some reason.
Click to expand...

@giggywatts the APC-35-350 should drive three Vero 18 at 350mA.

You said "What i have is three 5.4 x 22" usa heatsinks with four cobs each" & "I have the vero 18 d two to each driver". Do you have two drivers mounted on that 22" heatsink, and do you have any objections to replacing the two 350mA drivers with one bigger driver?
 
giggywatts said:
@Isawthelight i got to look at the charts and see what your saying about three cobs on the 350. Question what would i gain by stepping up to the 500?
Click to expand...

I'm saying that you have four Vero 18 COBs on a 22" heatsink. You could use one Meanwell HLG-60H-C350B 350mA driver to power all four cobs on the heatsink. Each COB would be run at about 15 watts. Or, you could use two drivers on that heatsink. Just trying to get the "big picture".

https://www.digikey.com/product-detail/en/mean-well-usa-inc/HLG-60H-C350B/1866-2609-ND/7704167

Stepping up to 500mA would make the Cobs ~20% brighter and ~30% hotter. (i'm using rough math / not calculated numbers)
 
500mA on each cob maybe a bit much for the heatsink he has. You can figure it out what amount of wattage it will cool. But idk think it's big enough to run that many veros that warm. Not enough surface area. 72w in cobs generates a good bit of heat for only a 5x22 heatsink passively cooled.
 
JavaCo said:
Vero 18 D runs at 27.2 volts when driven with 350 mA @25c 27.2 x .350 = 9.52 watts a cob drive them @ 500mA and they run @ 13.8 watts. That rough math is pretty rough :eyesmoke:
Click to expand...

13.8 ×4=55.2w that's doable on 22x5 heatsink passive. But the 18w each 72w would be a tad much for that size.
 
JavaCo said:
Might want to try the Bridgelux calculator it will do the maths for you. https://www.bridgelux.com/product-simulator
Click to expand...

I dont need that calculator. I know a heatsink that is finned in the size of 5.22 x 22 will not cool 72w of any led. Bc I know that aluminum is rated at 221 W/mK in efficiency at cooling. Copper is 393 W/mk if it was copper and that size yes. But aluminum would not cool effectively at that current. 72w of led with a heatsink that way standard straight fins. This is passive below. For straight fins. Solid standard heatsinks. Ones with pins and cut in the fins would be different of course. Maybe with his being actively cool it would be ok. But to stay in the most efficient temperature range on those running at that current 72w for that size wont do it. But thanks for that calculator. I had the link for that awhile ago and lost it. That's a great tool. Thank you very much.
  • hf is the convection coefficient of the fin
    • Air: 10 to 100 W/(m2K)
    • Water: 500 to 10,000 W/(m2K)
  • k is the thermal conductivity of the fin material
    • Aluminum: 120 to 240 W/(m•K)
  • Lf is the fin height (m)
  • tf is the fin thickness (m)
 
whytewidow said:
I dont need that calculator. I know a heatsink that is finned in the size of 5.22 x 22 will not cool 72w of any led. Bc I know that aluminum is rated at 221 W/mK in efficiency at cooling. Copper is 393 W/mk if it was copper and that size yes. But aluminum would not cool effectively at that current. 72w of led with a heatsink that way standard straight fins. This is passive below. For straight fins. Solid standard heatsinks. Ones with pins and cut in the fins would be different of course. Maybe with his being actively cool it would be ok. But to stay in the most efficient temperature range on those running at that current 72w for that size wont do it. But thanks for that calculator. I had the link for that awhile ago and lost it. That's a great tool. Thank you very much.
  • hf is the convection coefficient of the fin
    • Air: 10 to 100 W/(m2K)
    • Water: 500 to 10,000 W/(m2K)
  • k is the thermal conductivity of the fin material
    • Aluminum: 120 to 240 W/(m•K)
  • Lf is the fin height (m)
  • tf is the fin thickness (m)
Click to expand...

You have to factor in efficiency The newest vero18 are about 60%@ that current so really the heatsink would be seeing about 30 watts of heat and the other 42 watts get turned into light. You want the thermal resistance number of the heatsink, to do a proper heatsink calculation. Here is a link to a wonderful little write up about how to properly calculate how much of a heat sink you need. https://www.led-heatsink.com/thermal-calculation
 
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