Need input to get driver this 8000-11000 led !!!!

MikeAusC

Enlightened
Joined
Jul 8, 2010
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995
Location
Sydney, Australia
I'm in the process of writing up my modifications to a $12.00 DC-DC converter which will convert 12 volts to 30 volts at up to 3 amps to drive one of these LED arrays.

It's only 7 x 3 x 3 cm, but the heatsinking will need to be improved for long-term running at 100 watts.

I've modified the constant voltage output to add true current-sensing and it's designed to vary the current between 3 and 0.3 amps by changing the sensing resistor. I'm using Low=0.3, Mid=1.0, Hi=3.0 amps. There's only 0.5 volt across the resistor, so it's very efficient.

I have one of the Chinese 100 watt LED arrays and it's working well to drive that.
 
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