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BQ40Z50-R1: BQ40Z50 SMBus abnormal

Star Xu
Genius 9645 points
Part Number: BQ40Z50-R1

Hi

My customer use BQ40Z50 find some problems: data level (No. 9) can not be pulled down, and the clock is sometimes not too high or too low.

Attached waveform as below:

The application circuit is as follows: Battery output direct DSP, internal pull-up to 1.8V

Waiting for your reply.

Thanks

Star

  • 0
    TI__Mastermind 42535 points

    Hi Star,

    This does not seem to be caused by the gauge. Please check if the host lines to see if there's any issue with that. The gauge should not have issues with comms if the reference design is followed.