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bq24610 / NDVC configuration

S.Satoshi
Guru 21675 points
Other Parts Discussed in Thread: BQ24610

Hi All,

I'd like to know if bq24610 can be used with NDVC configuration like attached. Please let me know the point to be care if it can be used.

Best Regards,

Sonoki / Japan Disty

  • 0
    Guru 21675 points

    Hi All,

    I'm waiting for your comments. Your response will be appreciated.

    Best Regards,

    Sonoki / Japan Disty

  • 0
    TI__Mastermind 46551 points

    What are your input voltage, battery voltage and charge current? Will you be able to use bq2419x which is designed for NVDC?

    Thanks!

  • 0 in reply to Ning T
    Guru 21675 points

    Hi,

    The battery is 1s and charging current is 6A. The input voltage is 12V to reduce input current because the charging current is too high. So integlated FET charger like bq2419x can not be selected.

    They don't want to provide 12V to system, this is the reason why they are considering NVDC.

    Best Regards,

    Sonoki

  • 0 in reply to S.Satoshi
    TI__Mastermind 46551 points

    Hi,

    1. Your schematic does not work well because SYS and BAT are connected togerther so that the charge current can not be well controled.

    2. You should have a BATFET between SYS and BAT for NVDC configuration. Since bq24610 does not maintain minimum system voltage (e.g. 3.5V for 1s) as bq2419x does, SYS will not be able to start to work until BAT is charged to certain high enough voltage. It is up to the customer whether this is acceptable or not.

     

    Thanks!