In customer's system they use a BQ25611D as a charger for battery, and also the battery connect to a PFM boost SY7901 for Audio amplifier power supply.
when the PFM boost SY7901 work at light load, the switching frequency will drop to audible frequency range, in this case there is audible noise come from BQ25611D chip (not from the PFM boost).
this issue can be repeated on BQ25611D EVM using electronic load drawing transient current load at audible frequency , fox example 0A~2A transient load @1Khz-3Khz.
another issue is the charger BQ25611D can't terminate due to peak current draw by PFM boost is higher than termination current.
can you help to provide solution to fix this two issues?