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BQ76940: Schematic review

Part Number: BQ76940
Other Parts Discussed in Thread: TIDA-00792

Dear TI,

Can you guys help me regarding the review of my schematic.

I will share the schematic privately.

Am getting some issues with AFE 

1. Some times AFE getting damaged during testing.

2. Some time am getting wrong cell readings while testing.

  • Hi Harish,

    I will send you a friend request for private messaging.

    Best,

    Andria

  • Hi Harish,

    After reviewing your schematic, I did not see any major issues, but I did notice a few minor things:

    • Please review your alert pin configuration.  The recommended configuration is to have a ~510 kOhm resistor in parallel with a 470 pF capacitor.  TIDA-00792 has a great example of this.  TIDA-00792 reference design | TI.com
    • Although I was unable to see exactly where your SDA and SCL line connects led, please ensure that there are pullup resistors on these lines. (You may already have them, just on another page)
    • Currently, you do not have a boot circuit for your TS1 pin.  A rising edge on the TS1 pin is used to wake the device.  You may find this app note helpful: bq769x0 boot switch alternatives.
    • I cannot see your charge and discharge FET circuitry, so I cannot comment on that.
    • I also cannot see your system host (gauge or MCU), so I cannot comment on that.

    Best,

    Andria