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LED Driver Voltage Question
Posted: Thu Mar 22, 2012 12:04 pm
by sjmusic2
I am in the process of building a driver for 6 x 10w leds (10-12v Vf, 1A If) but saw a pre-made driver on alibaba that is dimmable (1-10v) and is current clamped (1A). It will output at least 114v DC and my question is will the excess voltage cause me any problems, I think not but want to be sure.
Re: LED Driver Voltage Question
Posted: Thu Mar 22, 2012 12:16 pm
by rimai
Well, the meanwell ELN-60-48 is constant current too with 60W at 48V, but being constant current, the voltage fluctuates according to the Vf of the LED string.
So, if you add 8 Crees, you only get about 30V give or take. That makes it for lower performance and higher cut off on the dimming. It would probably cut off at 20% or so. The cut off is trully based on voltage and not the %.