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BQ76952: Multifunction Pin Controls

RP
Prodigy 70 points
Part Number: BQ76952
Other Parts Discussed in Thread: BQ78350-R1A, BQ76930

Hello,

There is a specific requirement in my BMS design using BQ76952 in standalone mode.

Here is a brief about the requirement.

  1. Need to turn on LED's using multifunction pins in a standalone mode based on SOC level.
  2. There are a total of four LED's will be available 
  3. For 25% SOC one LED, 50% SOC two LEDs, 75% three LEDs and 100% SOC four LEDs 

Need to know the feasibility of this requirement.

Regards,

Ravi

  • 0
    TI__Guru* 81034 points

    Hi Ravi,

    The GPO function of the BQ76952 multifunction pins are controlled by commands from the host processor. For example, if HDQ is configured as a GPO, the HDQ_HI() and HDQ_LO() commands can be sent to set this pin high or low. The BQ76952 is also not a gauge, so it cannot compute SOC. So the features you describe are not possible in standalone mode. You would need an MCU to calculate SOC and then send commands to set the GPO states.

    For the functionality you are seeking, you may want to look at the BQ76930 + BQ78350-R1A. This TI reference design shows how these can be used together: https://www.ti.com/tool/TIDA-00792

    Best regards,

    Matt

  • +1 in reply to Matt Sunna
    Prodigy 70 points

    Hello Matt Sunna,

    Thanks for your reply.

    Regards,

    Ravi