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Original question:

BQ40Z80: BQ40Z80

BQ40Z80: BQ40Z80

avi hai
Prodigy 40 points
Part Number: BQ40Z80

Tool/software:

dear,

thanks for your answer.

With your permission, I want to double-check the issue -
I mean that once I configure all the parameters such as overcurrent, minimum cell voltage, setting the function of each leg, for example PCHG, etc. - are all of these saved when power is disconnected totally from the component or does everything have to be reconfigured when power is reconnected?

Another question -
I previously contacted you for help regarding protecting the battery inputs (VC1 - VC6) from reverse voltage that may be caused by connecting a battery or batteries in reverse, and you did not have a solution for this (see previous thread). The issue is very important and is a safety issue to prevent damage to the component or battery and I would greatly appreciate if you could provide a solution for this. I have thought of some solution and would be happy to hear your opinion - see attached drawing. Will these 2 PMOS transistors protect the component from reverse battery connection?

thanks for all the help

regards

  • 0
    TI__Mastermind 28470 points

    Hello,

    avi hai said:
    I mean that once I configure all the parameters such as overcurrent, minimum cell voltage, setting the function of each leg, for example PCHG, etc. - are all of these saved when power is disconnected totally from the component or does everything have to be reconfigured when power is reconnected?

    Yes, if the configuration is properly written to the data flash then they will be available after power has been reconnected.

    avi hai said:
    I previously contacted you for help regarding protecting the battery inputs (VC1 - VC6) from reverse voltage that may be caused by connecting a battery or batteries in reverse, and you did not have a solution for this (see previous thread). The issue is very important and is a safety issue to prevent damage to the component or battery and I would greatly appreciate if you could provide a solution for this. I have thought of some solution and would be happy to hear your opinion - see attached drawing. Will these 2 PMOS transistors protect the component from reverse battery connection?

    The addition of the FETs at this point can cause extra resistance at the cell connections, which in turn can affect the accuracy of the sense resistor. How are the cells being connected? Is there a way that the reverse battery connection protection could be done mechanically (using a one way connector, etc)?

    Regards,

    Anthony