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BQ2970: BQ2970 Different Status monitor through controller

Aakash Dey
Intellectual 590 points
Part Number: BQ2970

Hi,

We are using BQ29700 for protecting a single cell Li-ion battery. The schematic is attached. In the datasheet, I have found that the different protection are based on the different voltage level on COUT, DOUT, BAT pins. So, Can I connect them to the controller pins/LED to monitor the different faults in the battery? If yes, can you provide me some information about the tentative connections from the IC to controller/LED.

Thanks.  

  • 0
    TI__Guru 54715 points

    Hi Aakash,

    The BQ2970 is a very simple protector, it does not communicate its state other than to control the COUT and DOUT. Decisions are made on the BAT and V- pin voltages and the current state as described in the data sheet.

    It may be possible to put an LED on the COUT and DOUT, hese would create a load, be sure you don't create a path to bypass the protection.

    To monitor the condition of a BMS device it may be better to select a single cell gauge with protection.  You could monitor it with a MCU and light LEDs for the states of interest.

  • 0 in reply to WM5295
    Intellectual 590 points

    Hi WM5295,

    OK. Right now we are implementing BQ2970 in our circuit without any monitoring.

    In future, we will definitely think about implementing BMS IC. On that time, I will contact to the TI for any suggestions/ help.

    Thanks.