LM5010: The inductive device is howling

Rhea Gao

Part Number: LM5010

Hi,

The test inductance in the LM5010SD/NOPB power supply circuit has been "howling", resulting in our audio acquisition equipment can recover the problem of inductance "howling".

The usage requirement is Vin 12-48V, Vout 5V, Iout 100mA, frequency 169KHz.
Documentation is schematic diagram,and layout.

LM5010.docx

Please help to support this case. Thanks a lot!

over 2 years ago

0 Richard Fu22 over 2 years ago

TI__Mastermind 31315 points

Hi Rhea,

Thanks for sending the images.

The layout and schematic looks fine to me. Do you have a separate ground plane? Can you add a RC snubber across the diode (R = 2Ohm, C = 1-2nF) to see if this helps reduce the noise?

Regards,

Richard

Power management

Power management forum

LM5010: The inductive device is howling