I have trouble enabling the overcurrent fault detection in the SLG46580V. When increasing the load at the output I can see the output current limits to around 200mA. When in the current limited state I am expecting the nFAULT signal to go low, but it stays high. If completely short-circuiting the output so the voltage drops below 0.5V, the nFAULT signal go low as expected.
I have tried both high power and low power mode.
Am I missing something, do you need to enable any additional circuits in order to activate the nFAULT overcurrent detection?
Hi There, let me take a look and I'll talk with one of the apps engineers on this... will revert back shortly... BR JE_REN
It seems that you checked everything right. I have to check this issue on the hardware. nFAULT should go low when Over-Current Limit triggers and the output current should rise above ~210 mA. This feature works only in HP mode.
I just made the testing using my equipment and I replicated this issue. I still have to make some further testing on this issue
We investigated this issue and found that both conditions Over-Current Limit and Short-Circuit internally go through AND gate, which means that only when two of them were triggered, the nFault goes LOW. This is the datasheet typo and it will be corrected soon. Sorry for incoinvinces.