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BQ27Z746: BQ27Z746

Jack Claude
Prodigy 10 points
Part Number: BQ27Z746

Tool/software:

Good afternoon,

I purchased a BQ27Z746 chip and intend to use it as part of my battery management system for my electronics engineering capstone project. 

The intended use I had for this chip was to determine the charge life of a lithium-polymer battery (similar to how your phone displays the percentage of battery remaining). I was hoping to send battery charge life data to a microcontroller through the SPI function. However, as I am starting to design my circuits, I am unsure if this chip is actually capable of doing this. 

My question is simply whether or not my desired use of this chip is actually possible. If it is not would there be another chip that could perform this function?

Thanks for any help,

Jack 

  • 0
    TI__Mastermind 24685 points

    Hello Jack,

    Yes the BQ27Z746 chip would be a good choose to determine the charge life of a Li-ion cell for only a single cell application, typically seen with phones, tablets, watches and etc. The chip is able to talk to the MCU with i2c function. I would strongly recommend doing a proof of concept with the evaluation board BQ27Z746EVM-047 and the MCU EVM aswell and following the "Techinical document>>User guide>> BQ27Z746 Impedance Track Battery Gas Gauge and Protection Solution for 1-Series" documentation to start testing the system.

    However if you are planning using more cells in series than refer to the chart below.

    BQ27Z746EVM-047 link:
    https://www.ti.com/tool/BQ27Z746EVM-047




    Thank you,
    Alan