Hi all, I am looking for a high power led driver for the following:
3 identical led's in series with a total forward voltage of 11voltsconstant current drive 800-1200ma
Input source is a 12Vrms AC with > 10Amp drive capability (Can not use a DC supply for this application)
Can anyone recommend an led driver or perhaps a manufacture to start with?
Thanks, James
Rectify & filter the input, feed it to the input of an LM317. Install a 3 ohm & 2 ohm in parallel from Vout to Adj of the 317 and take your output from Adj. That'll give you 1 amp cc. A 1 ohm in place of the parallel resistors will give you 1200 mA, or use parallel
3 ohm resistors for 800 mA. Use 2 watt or bigger resistors.Ed
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