We face a problem that the bq24297 appears to suddenly shut down the path from USB to VSYS for a moment so that the connected Palmas PMIC shuts off.
I have tried everything, incl. setting the ILIM resistor to 0R and programming the ILIM to 0x07 (3A), but we still have these sudden system shutdowns. They do not occur if we supply VSYS from an external buck converter (TLV62090 for ~3.7V).
System current is between 600 mA and 1200 mA, so it remains well below the 3A limit and the voltage at the ILIM pin remains below 1V.
So it is most likely not the IINLIM mechanism.
But I got in one experiment a status register change interrupt from 0x05 to 0x0d (we test without battery and NTC).
I interpret this as SYSOVP but the description in the data sheet is quite short.
From this I could imagine that VSYS did overshoot by some external condition we still have to find, but then it undershoots because the bq24297 turns off the HSFET for a time too long to keep VSYS stable (which has approx. 130 uF decoupling).
So let me ask:
* what is the exact condition to trigger SYSOVP?
* what is meant by converter stops "immediately"? How long does this take?
* is this condition resolved automatically?
* how long does it take to recover?
* can VSYS break down below ca. 3.2V before the regulator restarts?