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current value

Yiyi Guan
Prodigy 10 points

I was using DPL Lightcrafters evaluation module. In order to get a higher light intensity, I input a very high current value.  The original value was 274 for all three LEDs, and I tried to input 400. Since I didn't see a higher light intensity,  then I tried 500 and 600.  I didn't feel any heat on the board, but now none of RGB light can be lit on.  I have checked RGB LEDs using external a power source, it seems that the LEDs are OK, still working.  What caused this problem? Is there any quick way to fix it?  Thank you.