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BQ76907: Is there a delay in current detection when using the CC1 register on the BQ76907?

Ferlyn Chua
Prodigy 100 points
Part Number: BQ76907

Tool/software:

Hi,

Is there a delay in current detection when using the CC1 register on the BQ76907? In my application, the firmware reads the CC1 register every 250 ms, but we observe a delay of approximately 400 ms between applying a -10A discharge current and the CC1 register reflecting the -10A value.

Regards,

Ferlyn

  • 0
    Prodigy 100 points

    Hi,

    Any update on this?

    Regards,

    Ferlyn

  • 0 in reply to Ferlyn Chua
    TI__Expert 5090 points

    Hi Ferlyn,

    You might make sure the device is not in SLEEP mode when you apply the current.  That may result in some additional delay until you see a new CC1 result.  Also, it is possible the CC1 current was being measured starting at T=0 to T=250ms, for example.  If you changed the current from 0A to 10A at T=125ms, then the result reported at T=250ms would be ~ 5A, since CC1 is effectively averaging the current across the 250ms window.  Then the next CC1 measurement over T=250ms to T=500ms would report at value of 10A at T=500ms.  Is it possible this is what you are seeing?

    Thanks,

    Terry