1. Question: Customer requirement 5~6V Vin= 5 to 6 V (not fixed)
I think that the package flush is peaked at this timing, because dropped voltage and charge current are maximum.
(Drop voltage= 5.0V-3.0V=2.0V, charge current = 1.5A , => the power loss is 3.0W RθJA = 40 °C/W)
Therefor, I think the charger IC(BQ42038) could not use with 1.5A charge current.
I would like to make sure that the device can meet this use case.
Not use
5~6V
Customer requirement
Vin= 5 to 6 V (not fixed)
Vbat= 4.36 V
I-Charge = 1.5A
Not use
4.36V
1.5A
3.0V