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bq77908AEVM Evaluation Module

Boris Hahn
Prodigy 20 points
Other Parts Discussed in Thread: BQ77908A

Hi,

I´ve a short question referring to the bq77908AEVM Evaluation Module.  My colleague puts the module on my desk with the opinion that there is a charger circuit on the module.

I studies the manual and the schematics, but I couldn´t find anything about an integrated charger circuit. 

After this, my opinion is that I need an external CC/CV charger circuit, if I connect the module to a Li-Ion battery pack. The Evaluation Module is just a battery protection circuit.

Who is right, me or my colleague?

Best Regards

Boris

  • 0
    Mastermind 7925 points

    From http://www.ti.com/tool/bq77908aevm-001:

    The bq77908AEVM-001 evaluation module (EVM) is a complete evaluation system for the bq77908A, a 4-series to 8-series cell Li-Ion battery protection integrated circuit. The EVM consists of a bq77908A circuit module and a resistor cell simulator module, which can be used for simple evaluation of the bq77908A functions. The circuit module includes one bq77908A integrated circuit (IC), sense resistor, power FETs and all other onboard components necessary to protect the cells from overcharge, overdischarge, short circuit, and overcurrent discharge in a 8-series cell Li-Ion or Li-Polymer battery pack. The circuit module connects directly across the cells in a battery. With a compatible interface board and Windows®-based PC software, the user can view the bq77908A registers and program the IC configuration and protection limits.

  • 0 in reply to MaciejKucia
    Prodigy 20 points

    I read this information already.  I just want to now, have I overlooked something or is there definitively no Li-Ion / LiPo charging circuit on the module?

    Best Regards

    Boris

  • 0 in reply to Boris Hahn
    Mastermind 7925 points

    There is no charging circuitry in the chip itself nor EVM.