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PMP5141 REVA REVB confusion

embedengg
Prodigy 110 points

Hi ,

I plan to build the reference design PMP5141, directly from the gerber files attached. But i notice that the schematics is of version REVB and PCB files are for version REVA and also the bottom layer picture posted in this webpage shows a diode crookedly placed. Is there any changes to be done for the PCB ? Do i have to create a new pCB file from the schematics?

Kindly post your feedback.

Thanks,

Sudha

  • 0
    TI__Genius 15910 points

    Sorry for the confusion.  In an effort to reduce cost, the pcb for a reference design isn"t usually respun for new revisions unless there are a large amount of modifications required for the new revision and a demand for more boards to be built.  The photo in the test report is the actual board that was tested to generate the report, and matches the Rev B schematic and BOM.  However the layout is at a Rev A level.

     If you look closely at the photo, you will see D12 is the SOT-23 diode, located just to the right of the SOT-89 that is actually Q100, which did not exist in the original Rev A layout.  (Any components with reference designators >99 did not exist on the original layout Rev A layout.)

     D8 is skewed as part of the modifications from Rev A to Rev B.

  • 0 in reply to Lisa Dinwoodie
    Prodigy 110 points

    Thanks for the feedback.As the changes are minor, i'm proceeding with the gerber file and plan to make the changes as per the schematics .