Meanwell DC-DC LDD Drier question

[Neogenocide]

Gents,

A quick question, is there a minimum number of LED's I have to use with these so I don't risk burning them up? I recently had 2 UV's hooked up and they quit working after 2 days.

Basic Setup, Bluefish, to LDD-H-4 Driver Board, Running Mean Well LDD-700H dimmable driver.

Thanks all!!

 

[oreo57]

too much current and/or not enough cooling...

 

[n2585722]

What is the input voltage to the LDD and how many LED's in the string? I use 12 volts for 2-3 LED's. For 6 LED's I use 24 volts as an example. I don't have any more than 6 LED's to a string.

 

[Neogenocide]

On the LDD-H-4 Driver Board, I have 4 drivers. 1 - LDD-1000H, and 3 LDD-700H's. There are 12 LED's on the first, and 12 LED's on the second, two on the third, and two on the 4th. Voltage from the power supply to the board is currently set at 48v.

 

[oreo57]

Which "UV's"??? (brand,model) .. Doesn't seem to be anything to do w/ voltage.. Either bad chips, bad attachments, or 700mA is "too much".. (all 3 are related btw)..

example:

Max Drive Current: 350mA to 800mA Viewing Angle: 125°
Forward Voltage @ 500mA: 3.2VDC to 4.2VDC

would "do" 500mA or less as SOP..
http://www.ledsupply.com/leds/ultra-violet-uv-high-power-led-star?gclid=CIviruTbiNECFQ-1wAodOZkIEg

NOT an endorsement of any part. LED..