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TPS53015: Skip mode output ripple phenomenon

Jericho Tsai
Intellectual 380 points

Part Number: TPS53015

Hi Sir,

My customer measure Skip mode ripple and SW waveform difference data sheet

Datasheet waveform 

m

Customer measure waveform

Zoom in

SW wave form Zoom in.

Why SW have many plus not one plus?

can we fine tune what component will similar datahesst waveform??

Thanks

  • 0
    TI__Guru**** 191445 points

    Jericho,

    There are no waveforms like that in the datasheet.  What circuit did you use to measure the top 2 waveforms?  Are all four waveforms from the same circuit, just zoomed in?  Can you provide your schematic and layout?

  • 0 in reply to JohnTucker
    Intellectual 380 points

    There are no waveforms like that in the datasheet.-->the waveform as below this skip mode output voltage and SW waveform form datasheet figure 15.  

     

    What circuit did you use to measure the top 2 waveforms? 

    Are all four waveforms from the same circuit, just zoomed in? yes.

    Can you provide your schematic and layout? you can refer to below

    https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/196/PH10SU_5F00_PTP_5F00_DB_5F00_PWR_5F00_0509_5F00_1500_5F00_R0A.7z
    Thanks  

  • 0 in reply to Jericho Tsai
    TI__Guru**** 191445 points

    Jericho,

    Yes that is the waveform from the datasheet, but not the same from your original post.  We are going to move this off line.  I'll close this thread now.