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TPS40211EVM-352: PCB not running in advertised limits, loud audible ringing

Davian Larente
Prodigy 20 points

Part Number: TPS40211EVM-352

Is there a known issue with this development PCB? When using PWM, a audible ringing is coming from the circuit.

The output is not stable with a LED load, Cannot run more then LED forward voltage of 25V. Output collapses quickly after running and settles out at 13V. Behavior is present on DC load as well.

Is there a know modfication needed for PCB operation on HPA353 REVA?

  • 0
    TI__Guru 64861 points

    Hi Davian,

    thank you for using the E2E forum.

    I do not know from any issue with that EVM.

    Can you try to use an resistive load instead of the LED for further investigation, e.g.

    25V/0.7A = 35 Ohm

    30V/0.7A = 43 Ohm

    Best regards,

     Stefan