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BQ40Z80: Can you reccommend smart charger

Ivo K
Prodigy 240 points
Part Number: BQ40Z80
Other Parts Discussed in Thread: BQ24770, BQ25710

I am looking for smart charger IC for using together with this part above. Can you reccomend some pn? 4Cells in series with charging current 6 to 10A. System will have a mcu.

Second part of question is can you quide me in implementing battery pack which will have only 2 battery pack terminals and they are used both for charging and load supply (in turns of course)?

Thank you!

  • 0
    TI__Mastermind 42535 points

    Hi Ivo,

    Please refer to our datasheet for an application example of how to design the circuit using the bq40z80.

    Your question about chargers has been referred to them.

  • 0 in reply to Batt
    TI__Genius 10385 points

    Ivo,

    If you are looking for a buck charger take a look at the bq247XX family of devices. Most of this family supports 1s-4s charging at 8-10 A. The exceptions are 702, 703, and 715. If you are looking for a buck-boost charger, I recommend you take a look at the bq257XX family as they all support 1s-4s charging at 8 A.

    Thanks,

    Ricardo

  • 0
    TI__Genius 10385 points

    Ivo,

    We have not heard back from you in a while. Please let us know if you have any further questions, otherwise we will consider this thread resolved.

    Thanks,

    Ricardo

  • 0 in reply to Ricardo
    Prodigy 240 points

    Thank you for charger suggestions! I will check those.

    What about commutation and topology if battery includes charger and outside world sees only 2 battery terminals. Software will control charger and discharge according to some logic and commands from outside. What would be effective way to control charger connection when schematic is based on bq40z80 evaluation kit principles?

  • 0 in reply to Ivo K
    TI__Genius 10385 points

    Ivo, 

    The bq40z80 IC uses SMBus to communicate. bq 25700A, bq25710, and bq24770 are capable of SMBus communication. You will need a host controller capable of this protocol to control the gauge and charger IC via software.

    Thanks,

    Ricardo