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BQ25756: abnormal inductor whine

Zoey Wu
Expert 5855 points
Part Number: BQ25756

Tool/software:

hi team,

my customer found that when the inductor will wine in the system in 25.4V/2.5A output, 23-27 Vin. Attached is the inductor they are using. Do u have any advice? thanks!

  • 0
    TI__Mastermind 31145 points

    Hello Zoey,

    Thanks for working on this. I've got a few questions to help debug this:

    • Can you send me the schematic?
    • Can the customer measure SW1 and SW2 with an oscilloscope?
    • Does the charger behavior improve if the customer sets the bit EN_CONV_FAST_TRANSIENT=1?

    Best Regards,
    Ethan Galloway