LED Driver/Power Supply question

It could work but there would be so many additional variables involved that it would not be worth the trouble. The LDD drivers are basicly designed to run a a DC voltage supply which depending on the current requirement of the system could be much less expensive.

Personaly I find the dimmable drivers that are designed to run on 90 to 250 volts of AC wall current much more practical than running a seperate power supply and multiple LDD drivers. Dependent on your set up there is not always a big difference in cost either.
 
Ironically.. I'm fairly sure that picture is just a regular "constant voltage" power supply like you could use for the LDD's though and not the proper "constant current" power supply. Its just false Chinese labeling or lack of a clear definition of what the LED drivers we commonly use and refer to are. They just slap "LED" on it to sell more. or its "intended" use is for other led strip lights,etc.. that already have built in current limiting.
 
yes after examining the label it is probably a standard switching supply capable of handling a hair over 60 Watts. If your using them with LDD drivers think of one power supply per LDD driver. Now compare that price plus the cost of the LDD to what you need in if you use an ELN 60 series driver.
 
Nah, typically the power supplies supply enough Amps to run a few ldds. Like I have 2 power supplies @ $30 each supplying 12 ldd's...

but yeah thats why i was asking about this...hopefully I can power the ldd's and achieve dimming capability on a previously non-dimmable led light...for under $20!
 
Aqualund said:
Nah, typically the power supplies supply enough Amps to run a few ldds. Like I have 2 power supplies @ $30 each supplying 12 ldd's...

but yeah thats why i was asking about this...hopefully I can power the ldd's and achieve dimming capability on a previously non-dimmable led light...for under $20!
Click to expand...

Well the one in the picture can only supply 1.5A or 72W max.. So thats only 1 or 2 LDD drivers depending on which one you have.
 
Aqualund said:
I know, thanks. There's only 1 circuit being driven in this fixture that I'd be hacking.
Click to expand...

Give us the specs on the LED's you will be driving. How many, maximium current, and operating voltage. I'm sure you will get some economical answers.

I'm one for watching the budget myself and some of my budget cutting ideas do turn some heads. As a example I only run dimmable drivers on the white LED's with my blues on a simple on off timer.
 
My full spectrum arduino driven led array is already built and working great.

What I am asking about here is something completely different and on a side note to see if I can indeed hack these ecorays and make them dimmable by simply adding an ldd driver after the existing power supply.

That is the only way this would actually be a cost effective hack...otherwise if I get new drivers and power supply I might as well just throw these in the garbage and make my own unit.

Thanks for all of your help.
 
The 42-48V 1.3 amp LED driver part of the label and that its powering an ECO Ray LED light makes me think it has some internal current limiting by some means.

But the narrow voltage range and the 48V 1.5 amp output rating makes me think it will work as a constant voltage supply if connected to an LDD. It likely has an internal pot that is factory set for 1.3 amp current limiting within the range of 42 volts minimum and 48 volts maximum output for the light it's driving. All you can do is try it.

If in doubt I'd just get a known power supply for an LDD driver for peace of mind.
 
Yes spec wise is sounds like it should work. But it is also current limiting and the question is if the LDD driver needs more input current than it is capable of supplying. If it does then the voltage from the suppu will probably be reduced and will itbe in the operating range of the LDD driver to light the LED's as breight as you want them.

In worst case senerio I would not expect any of the components to burn out. But the LED's might not get to the full power you desire do to limited voltage. If the voltage is limited to much your LED's might not even have enough to turn on.

I would try it and see what happens. Measure your voltage across a few LD's after power up and if that is with in range go with it.
 
Yeah, you could run only up to the 1.3 amp current from the PSU, so only 1 LDD over 700mA to be safe or a combination that does not add up to more than 1300mA (unless one of those LDDs only had a couple LEDs on it, but that's a side track of them being able to convert over voltage into current, reducing their current draw from a PSU)
 
Cool yeah thanks to both of you thats what I thought. I just wanted to verify before I started my house on fire.

Do they make 1300mA ldd's yet?
 
The LDD-L series just came out with some at 1200mA and 1500mA. Limited to 36 volt input however, perhaps very soon though.
 
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