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BQ25710: Application requirement

Yadong Duan
Intellectual 1200 points
Part Number: BQ25710
Other Parts Discussed in Thread: BQ25720

Hi Team,

The charging current of the customer project needs up to 12A. The datasheet of BQ25710 shown that when it is 10mohm, the maximum charging current can supported 8.128A. Can BQ25710 change the charging precision resistor to 5mohm to support the charging current to 16A?
Can you help me confirm if this is possible? If feasible, how to design the layout?

Many thanks~

  • 0
    TI__Mastermind 33445 points

    Hi Yadong,

    Theoretically, the customer could change the current sense and double the output current using BQ25710. 

    In fact, the customer is better off to use BQ25720, which has enhanced gate drive, and supports 5mohm current sense. 

    We have a 140W reference design on the web. Please check it out. 

    https://www.ti.com/tool/PMP22419

    Regards,

    Tiger

  • 0
    Intellectual 325 points

    Hi Tiger:

               Wanna know the difference between BQ25710 and BQ25720? Do you have comparison table on these two devices?

  • 0 in reply to liting Lei
    TI__Mastermind 33445 points

    Hi Liting,

    The BQ25720 has enhanced gate drive for high power, and additional feature. 

    Items

    BQ25720

    BQ25710

    Vin

    3.5V~26V

    3.5V~24V

    Maximum Charge Current

    16.256A

    8.128A

    Max Input Current Limit

    10A

    6.35A

    Current Sense

    10m/5m

    20m/10m

    Q1 and Q4 Gate Drive

    Normal/Strong (programmable)

    Normal

    Battery discharge current

    Two level

    One level

    OTG voltage range

    3-24V

    3-20.8V

    OTG Voltage Resolution

    8mV

    8mV

    PTM Mode (Patented)

    Yes

    Yes

    PTM quiescent current

    2.5mA

    5mA

    Fast Role Swap(FRS)

    Yes

    No

    Frequency Dithering (Patented)

    Yes

    No

    VAP mode(Intel)

    Mode 1/2/3

    Mode 1

    Other improvements

    Fast IINDPM, BATOVP

    -

    Package

    4x4 mm QFN-32 (P2P)

    4x4 mm QFN-32 (P2P)

    Regards,

    Tiger