5Amp Constant Current LED Driver

LittleBill wrote:

SCVJeff wrote:


One thing never mentioned here is that the current draw from an LED WILL change upward as it warms up, and it can roll right through the max current for the device if you are running it hard. I have that problem with LEDZILLA, and resistors wont fix that either, so the second board I bought will replace the V only regulator on it.

i will say i see the exact opposite with a led array

Clicky


i have this hooked to a lab dc CV,CC PSU, after about 1 minute it starts dropping current requirements, roughly 1ma a minute, that said it is regulated as it doesn't drop regulation till about 10.5v

I did the same here and once I saw current slowly creeping up I quickly dialed the CC knob back down. No idea if there is a tendency for LED's to run away once started, but didn't want to find out either. We need a silicon engineer on the forums...