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BQ76952: bq76952-PTO

jmyang
Expert 1186 points
Part Number: BQ76952

Hello, Ti experts，

              According to the specification, when the PTO occurs, CHG-FET will be automatically started.

              However, the actual test found that after the CUV, then I made bq76952 trigger the PTO.

              At this time, I found that the battery could not be charged or discharged.

             shouldn't CHG-FET be automatically enabled? 

             I don't know if my understanding is correct.  

           

  • 0
    TI__Guru* 81034 points

    Hi, 

    I think this may be an error in the pre-production version of the datasheet. The new documentation for the device (which should release to ti.com next week) has this for the paragraph you highlighted:

    When a PTO fault is triggered, the device will turn off the PCHG FET if configured for autonomous FET control, based on the setting in Settings:Protection:CHG FET Protections C[PTO]. Precharge mode cannot restart until this fault is cleared by sending the PTO_RECOVER() subcommand.

    So the CHG FET will not be automatically enabled.

    Best regards,

    Matt