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Original question:

TPS61081: inductor scream

TPS61081: Inductor screams

user5036420
Prodigy 20 points
Part Number: TPS61081

Hi, everyone:
The board I designed refers to the Buck topology of JW1130, when I use a PWM wave to control the EN / DIM pin. Everything works, but the inductor screams.

  • 0
    TI__Guru* 78070 points

    Hi User,

    Thank you for using the TPS61081.  It seems your inductor vibrates remarkably to cause the audible noise.  Can you increase  your dimming PWM frequency to above 20kHz so the vibration is out side the hearing frequency range?  Or check with the inductor vendor to get a different make not causing audible noise?

    Thanks,

    Youhao Xi, Applications Engineering