Other Parts Discussed in Thread: BQ4050
Dear Expert
Set BQ25798 charging current to 3200mA and cutoff current to 80mA,. The measured cut-off current is 182mA, which cannot meet the specified standard ≤100mA.
BQ25798 sets the same charging cutoff current of 80mA. The accuracy of the cutoff current varies between setting a charging current of 1000mA and 3200mA
Sample. The charging current is 3200mA, and the measured cutoff current is around 182mA. For a charging current of 1000mA, the measured cutoff current is 77mA. Is it possible to
Explain what causes this phenomenon?
1. Use a 70W USB-C Power Adapter PD for charging, with charge current (REG03) set to 3200mA and term current (REG09) set to 80mA. The cut-off current read by the charging terminal BQ4050 is 182mA
Charging current 3200mA, cut-off current 182mA
charge current Set 3200mA
term current set 80mA
Using a 70W USB-C Power Adapter PD for charging, set the charge current (REG03) to 1000mA and the term current (REG09) to 80mA. The cut-off current read by the charging terminal BQ4050 is 77mA
2.During the charging activation process, when the charger is first connected, the LDO voltage REGN of BQ25798_ 5V will suddenly drop to 0V, making it impossible to start charging. The second time it is connected to charging, it can be charged normally. May I ask what conditions can cause a REGN of BQ25798_ 5V off?
