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bq51013b output question

Jerry Chu
Genius 4915 points
Other Parts Discussed in Thread: BQ51013B

Hi Expert,

My customer used bq51013b for RX solution, the TX is other vendor solution. In the other project, it works well. But in new project, we found the below waveform. We have fine tuned some Cs/Cd/Ccm1/Ccm2, not improved.

The CH2 is RX output voltage, CH4 is the RX output current. When we added the loading, that can get the waveform.

Do you have any idea for it? Thanks!

  • 0
    TI__Genius 14890 points

    Jerry,

    Can you look at the RECT voltage on the bq51013B during this time?  What is the frequency at AC1?  It would be best to get this value at the steady state of no load, during the addition of the load, during the increased VOUT and during the steady state with full load.

    The steps of the increased VOUT are occurring after communication pulses.

    What are you using for a load step?

    Regards,

    Dick