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Original question:

Stand-alone usage of BQ40Z60

BQ40Z60: Standalone configration

Mayank Kothari
Prodigy 20 points
Part Number: BQ40Z60
Other Parts Discussed in Thread: BQSTUDIO

Hello

I am working on the BQ40z60 EVM. I am able to manually charge and discharge the cell. But I am still not able to configure the charging current and make it as a standalone system. Could someone guide me for the same? The reference documents I have used are following

  • 0
    TI__Intellectual 2146 points

    Hi Mayank,

    Can you explain a bit more what you're trying to do with the gauge? What do you mean by a standalone system? The gauge also doesn't set the charging current - this depends on the charger you're using.

  • 0 in reply to Albert Anwar
    Prodigy 20 points

    Hello Albert

    The BQ40z60 can have an integrated charging + gauging + Protection. I am able to enable charge, discharge and load connect via the BQStudio tool. It has a programmable charge current,  path selection etc. The IC communicates on SMBus. I am trying to figure out how we set the IC parameters such as 

    Cell Config - 3S

    Charge current - 4A

    Balancing - Enable

    The gauging can be displayed on the LED using the GPIO available using 4 LED. So, I want to understand if can be done without controller communication. 

    I hope i am able to put my point.

  • 0 in reply to Mayank Kothari
    TI__Intellectual 2146 points

    Mayank,

    Cell configuration can be set under the Settings > Configuration > DA Configuration register by setting the CC bits. In your case these bits would be 0b10.

    The device cannot set the charge current. This is up to the charger you use to provide. You can set the current limit during charging to 4A though, but if the charger provides less than that then the device cannot do anything about it. For setting the current limit, see section 4 of the TRM.

    Cell balancing can be enabled under the Settings > Configuration > Balancing Configuration, and setting the CB bit.

    Yes, you can use LEDs without controller communication. See section 6.2.6 in the TRM for setting that up.