Hello,
We're using the BQ24257 in a new design. In stand alone mode USB detection doesn't seem to be working correctly. A dedicated USB-charger, capable of supplying 2.1A is sometimes recognized as charger and charges with the set current limit of 1.8A, sometimes it charges with a current of maximum 500 mA and most of the time the current is no higher than 100 mA.
We'd like to know why the BQ24257 doesn't recognize the USB charger consistently.
See the attached battery charger schematics.
Regards,
Niels Kooy