Diy help pls

[iliriano6]

I'm looking into this driver but need to know how many led I could drive with it.


Input

100-264 VAC 50- 60Hz

Output

50- 90VDC 300mA

I would like to drive 3w cob led white with this unit. Thks
This is going on a diy algae turf.

[PabloArg]

Dont work for 3w leds, only if you want your leds at half power. This driver is for 1w led. You need 700mA driver.

[iliriano6]

Thks but the led stats are 3w @300ma. eBay cob led.

[PabloArg]

And how many volts? because to run at 3w with 300mA you need 10v.

[iliriano6]

Yeah they said 9-11v so I though maybe 8 to 9 in total. But not sure.

[PabloArg]

Well, with this driver you can run 5 to 9 leds.

[iliriano6]

Thks I was planning on running only 8 led. Or maybe I should post a link to led and maybe you could see the led. And thks for help.

[iliriano6]

http://www.ebay.com/itm/351090772777

[PabloArg]

You're welcome!

You can run 8 leds in series perfect. Please, add the link to led specs.

[PabloArg]

I see the specs, no problem to connect 8 leds, but remember, connect the leds in series.

[oreo57]

I'm looking into this driver but need to know how many led I could drive with it.


Input

100-264 VAC 50- 60Hz

Output

50- 90VDC 300mA

I would like to drive 3w cob led white with this unit. Thks
This is going on a diy algae turf.

BEST to keep under 70V total. Voltage adds in series, so any # of LED's that add to 70V total AT 300mA will work.

1W or 3W makes no difference (within reason) except for how bright and how much heat is generated..You could do 21 ind. LED's at 3.2v..
ect.

IF you are referring to something like this:
http://www.banggood.com/3W-High-Power-COB-LED-SMD-Round-Light-Bulb-DC-11V-3000-3200K-230-250LM-p-940603.html?currency=USD&refreshTmp=1&utm_source=google&utm_medium=shopping&utm_content=saul&utm_campaign=led-gadget-US&gclid=COvLq-7H5sQCFRSUfgodr4wA2g

70/11 V = 6.36chips in series or 6 easily, 7 OK (11x 7= 77V) , 8 (11 x 8= 88V) is pushing your power supply.
It is normally NOT a good idea to max out a power supply.
ABOVE based on these parameters:
Type: COB LED
Power: 3W
Voltage: 11V DC
Current: 300mA
Luminous Flux: 230~250LM


Oh and you need at least 5 to go above the 50V minimum..

[iliriano6]

BEST to keep under 70V total. Voltage adds in series, so any # of LED's that add to 70V total AT 300mA will work.

1W or 3W makes no difference (within reason) except for how bright and how much heat is generated..You could do 21 ind. LED's at 3.2v..
ect.

IF you are referring to something like this:
http://www.banggood.com/3W-High-Power-COB-LED-SMD-Round-Light-Bulb-DC-11V-3000-3200K-230-250LM-p-940603.html?currency=USD&refreshTmp=1&utm_source=google&utm_medium=shopping&utm_content=saul&utm_campaign=led-gadget-US&gclid=COvLq-7H5sQCFRSUfgodr4wA2g

70/11 V = 6.36chips in series or 6 easily, 7 OK (11x 7= 77V) , 8 (11 x 8= 88V) is pushing your power supply.
It is normally NOT a good idea to max out a power supply.
ABOVE based on these parameters:


Oh and you need at least 5 to go above the 50V minimum..

Thks

[zachts]

Also I must point out that DC voltage over 50 volts gets into the range where dangerous shock hazard becomes a real issue, especially in a DIY near water, like a turf scrubber. If you use a driver capable of more than 50 volts be absolutely sure you never touch the board or wires or heatsinks when powered up and be equally sure everything is safely wired and sealed up so you can't accidentally touch it, short it to the heatsink, get it wet, etc.........safety first.......

A better driver choice would be using the plain old Meanwell ELN-48 driver (or comparable) and then run your LEDs in serries parrellel. 3 strings of 3 COB LED arrays. Set the driver to output around 600 to 750mA.

You should run those COB arrays at currents below their rated 300mA anyway as they look to be 3 rows of diodes wired in parallel internally, so pushing them to max is asking for them to burn out........

[karimwassef]

+1 on the DC voltage risk. Don't go above 50V unless you're super confident in your design and implementation abilities. So, only 5 LEDs on a string at 10V each.

The higher the voltage, the greater the potential for a ground fault due to dirt, salt, water or any other contaminants from the peak voltage to ground. Assuming you're properly grounded, it would trip your GFCI (good for you) and cause more headaches.

[zachts]

+1 on the DC voltage risk. Don't go above 50V unless you're super confident in your design and implementation abilities. So, only 5 LEDs on a string at 10V each.

The higher the voltage, the greater the potential for a ground fault due to dirt, salt, water or any other contaminants from the peak voltage to ground. Assuming you're properly grounded, it would trip your GFCI (good for you) and cause more headaches.

I've been told by a few electritians that the DC side of drivers and PSU's are isolated from the wall outlet and AC mains and more than likely will just keep on shocking you and not trip the GFCI. Thus one of the reasons for much higher risk with DC voltage supplies over 50 volts. 50 volts can't do much harm to you in most cases (could still stop your heart under the right conditions just not likely). but higher than 50 volts gets potentially very dangerous.

[karimwassef]

The LEDs are isolated, but I always ground my fixtures.