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BQ24600 system load connection

Evan W
Mastermind 39610 points
Other Parts Discussed in Thread: BQ24600, BQ24133

Hey team,

Can the BQ24600 be used by attaching the system load from the left side of Rsense on the picture attached?

Thanks,

Evan

  • 0
    TI__Mastermind 39610 points

    Picture did not attach. here you go. Please inquire asap.

    Thanks,

    Evan

  • 0 in reply to Evan W
    TI__Expert 5565 points

    Evan,

    This is not recommended since there is no way to monitor the total output current. If a short happens on the system load, it could burn out the external MOSFETs. It's not mentioned in the datasheet, but the charging current is limited to 3A when VBAT < 3V. This is to protect the body diode of the low side MOSFET so that it doesn't experience high current.

    If you need this functionality, I would recommend a charger that supports narrow voltage DC (NVDC) architecture. What is the customer's battery voltage? What is the desired charging current? I would recommend looking at the bq24133 (1-3 cells, 2.5A charging current) or the bq2417x (1-3 cells, 4A charging current).