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BQ25700A: enter CV mode chage current oscillated

Part Number: BQ25700A
Other Parts Discussed in Thread: BQ25700

BQ25700 Solution:

input 12V:

charge voltage 13.2V; 

questions:CC stage   is normal; once enter the CV mode, charge current oscillated, as attached. how to fix? Please give me your suggestions ASAP. thanks

BQ25700 issue.docx

  • Hey Jelly,

    If you apply a load to VSYS, does this oscillation go away? Was this test done with a load on VSYS or with a load?

    Can you take a scope capture of the SW2 node when the battery voltage is this high?

    When the oscillation is occuring, can you capture the all the charger register settings?


    Regards,
    Joel H