My design consists of 2 TPS92602-Q1, which gives 4 LED channels in total. If I turn on all 4 channels at the same time with full power (100% duty), the 4th channel seems to detect overcurrent (DIAGx measured at 3.3V). This doesn't happen if all channels running with lower duty or if the 4th channel is running without the others.
I suppose this could have something to do with unwanted noise. Is there a good way or starting point for finding the root cause? What could I try?
Thanks for any help in advance!