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BQ2980: BQ29012RUGR

Adam Daluga
Expert 6385 points
Part Number: BQ2980
Other Parts Discussed in Thread: CSD85302L,

Hello,

I had some questions about the BQ29012. I'm trying to shut down my battery at ~45-60C

1. Does the circuit protect in over-current in both directions? (Current into or out of battery) Looking at page 8 of the datasheet it appears so but I would like to confirm.

2. How does the internal temp sensor work? Does the chip draw much power or is it better to use a ptc? Is there ptc selection guidance?

3. Would this NFET be compatible with csd85302L? I am discharging at <10mA rate.

Thanks for the help!

Adam

  • 0
    TI__Expert 7455 points

    Hi Adam,

    1. Yes the BQ2980 protects against over current during charge and discharge.
    2. The BQ298012 in particular has the temperature protection disabled. If you would like that feature, you would need to select another version of the device. Currently, we do not have a version of the device that is internally configured to use a PTC. It is an option for future devices, but you can also configure the pin externally. We don't have a part number in mind that we recommend.
    3. We recommend a FET with an abs max Vgs of around 8V. The CSD85302L is around 20V. Here is a link to the FET we use on our EVM: https://www.onsemi.com/pub/Collateral/EFC8811R-D.PDF

    Let me know if you have any additional questions!