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BQ25892: BQ25892

user6342741
Prodigy 50 points
Part Number: BQ25892

Hi ,

Can you provide the maximum output current of bq25892（output voltage is 3.8V）？

And the rated current of MOS transistor Q1 、Q2、Q3 and Q4？

Since the peak current of my system startup is 11A（voltage is 3.8V）, I am not sure whether the output current of bq25892 can meet the requirement

  • 0
    TI__Guru 57341 points

    Hi,

    BQ25892 is a 5-A charger. It can handle up to 5A total current, i.e. the sum of the charging current and the system current. If there's no battery, the maximum system current can be 5A. Please note that the max input current limit is 3.25A, the system current and/or may also be limited by the input power.

    If there's no SYS load, the maximum charge current can be 5A if the input power allows.

    Thanks,

    Ning.

  • 0 in reply to Ning T
    Prodigy 50 points

    Hi 

        If the design is VBUS and battery power supply at the same time（see picture below）, what is the maximum output current of the system?

  • 0 in reply to user6342741
    TI__Guru 57341 points

    Hi,

    Both the charging current (IBAT) and the system current (ISYS) are considered the output current of the charger. If there's no battery (i.e.no battery charging current), the maximum system current (ISYS, i.e. the SYS load you highlighted in red) can be 5A. Please note that the max input current limit is 3.25A, the system current and/or may also be limited by the input power.

    Please visit https://e2e.ti.com/support/power-management/f/196/t/875386 for BQ2589x/BQ25898x FAQs.

     

    Thanks,

    Ning.