The customer design with BQ25792, and set the charging current 1.5A, when the battery is 3V, then start to charge, but charge current sometimes100mA, sometimes 300mA, sometimes 1.5A.
Attached the register setting:
Schematic as below:
The waveform as below:
1. Battery voltage 3.1V: ch1:VSYS ch2:Vbat ch3:Ibat
2, When the battery voltage is charged to 3.16V, change a battery with 4.1V to confirm the charging current, the waveform is as follows:
3, Re-insert the battery that has just been charged to 3.16V, the charging current is 1.46A, repeatedly plugging in and out the USB and the battery, the charging current is always about 1.5A, there is no abnormality, at this time the VSYS voltage is about 4.2V
Please give some suggestion with this query.