MP24881 DC DC converter

vijaybhong555 · June 17, 2025, 9:58am

Hi I’m using the MP24881 IC in one of the LED driver application. When I have check Radiated Emission Test then my driver getting failed around 50Mhz Frequency. When i saw the Waveforms then ringing is present while switch on & OFF.
Can any one give the proper guidance regarding the same.

kathleen.lum · June 17, 2025, 5:50pm

Hi,
Welcome to the MPS Technical Forum!
This is likely an EMI problem. Can you show me your waveform for EMI testing, as well as, the settings for the EMI testing?

Thanks,
Kathleen

vijaybhong555 · June 18, 2025, 5:46am

Yes Sure.
Please find the attached Image.

kathleen.lum · June 23, 2025, 4:27pm

Thanks for attaching the image. I am working on getting the recommended EMI performance for this part.

kathleen.lum · June 23, 2025, 5:49pm

Hi,
This could be a layout issue. Would you be able to provide a waveform of the ringing you mentioned as well as your layout for this component?

Thanks,
Kathleen

vijaybhong555 · July 1, 2025, 7:43am

Ok.
Can you please send the DC DC designer tool for MP24881.
So it is possible to get the other parameter’s also.
Please share it will be beneficial for me in next design also.

Thanks,
Vijay