MP24881 DC DC - Observations

DC-DC Power Converters
1

Hi, I’m using MP24881 in my design & below are the observation.

  1. While PWM dimming Noise is observed.

  2. While Increasing the PWM frequency Load regulation is worse.

  3. Output Ripple is observed(on Mobile camera)

I’m Taking fallow up from MPS team but yet i’m not getting any update on this.

2

Hi,

Were you reaching out to a local FAE in MPS? What is your test setup? Are you testing on the EVB or your own PCB? If you are testing on your PCB, can you share your schematic and layout with us? Thanks! If you can, I also want to see the waveforms for Vout, Vsw and the input voltage.

Best,

Fox

3

Hi,

We have checked with both EVB & Our PCB.

Same Schematic we have fallowed as given in the application note.

When we will increase the PWM frequency from 1Khz above then noise will remove but Load regulation is very worst.

Vin 59V CV,

Vout8-54V & Iout 150mA to 1050mA for Pout 20W max.