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BQ28Z610: BQ28Z610

Dohyun Kim
Prodigy 20 points
Part Number: BQ28Z610

Hi everyone, I have a quistion.

There is a switch(S1) at the bq28z610 EVM board.

Because my system supplied power from the battery pack, i'm using this switch to power up the bq28z610 after battery pack connection.

Before push the switch, my system is off, so i can't command that set the chg/dsg fets.

My quistion is,

is there any solution that automatically power up the bq28z610 after battery pack connect to bq28z610(without command).

  • 0
    TI__Expert 6575 points
    Typically the device is initially in shutdown, and connecting only the cell side will not exit the device from shutdown.
    To exit shutdown, the device needs to see a voltage on PACK+ and PACK- (typically a charger being connected).
    Pushing S1 essentially connects the Cell stack voltage to PACK+ and that is why it is able to exit shutdown.
    So the only way to automatically power up bq28z610 would be to either put a voltage on PACK+ or disabling shutdown of the device once it is powered up.
    Regards,
    Swami
  • 0 in reply to Swaminathan Ramanathan75031
    Prodigy 20 points
    Thanks for yout reply.
    I think another way.

    1. replace the S1 Switch to a electrical switch(ES). And set this switch to active state(if the switch active low, then pull down).
    2. connect the battery
    3. because the ES is active state, bq28z610 will power up.
    4. my system is powered up, then the mcu controll the ES to OFF state.

    how do you think this solution??