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TPSM82913EVM: Are Altium design files available for this EVM?

Stephen Goadhouse
Prodigy 20 points
Part Number: TPSM82913EVM

Looking for Altium design files for the TPSM82913EVM. Are they available?

  • 0
    TI__Expert 5470 points

    Hi Stephen,

    Normally we'll not share the EVM design files with customer.

    Thanks,

    Andrew

  • 0
    Prodigy 20 points

    The User's Guide for the EVM under section 4 Board Layout says, "The Gerbers are available on the EVM product page." I do not see them on the product page for the EVM. So is it possible to post the Gerber files for the EVM here?

  • +1 in reply to Stephen Goadhouse
    TI__Expert 5470 points

    Hi Stephen,

    I think you are right. It seems the EVM Gerber file was forgotten to be uploaded on product page.

    I uploaded the gerber file of EVM here.

    BSR213A_gerbers.zip

    Thanks,

    Andrew

  • 0
    Prodigy 150 points

    In case this helps... I just got back my first two boards using this part using an identical footprint to the reference design.

    I'm using a 4mil thick stencil. Be aware there is way too much paste on the pads with insufficient room for the excess to escape. The paste mask needs smaller apertures for the outside edge pads, and the pads need to be longer (e.g. extend outside the body of the chip) to allow the excess to escape.

    Of 4 boards placed, 2 have had solder bridges as a result of very large solder balls at the outer edge of the pins. In one case, wicking away extra from the outer edge fixed the problem. In another, the part had to be completely removed and replaced.

  • 0 in reply to Mike Neuman
    Prodigy 20 points

    Thanks for the feedback and tip, Mike. I almost always extend the length of pads for DFN / QFN footprints w.r.t. datasheet drawings. Primarily to make probing easier but I can see how it can help with solder as well. Did you by chance compare the datasheet footprint drawing to the reference design on the EVM? 

  • 0 in reply to Stephen Goadhouse
    Prodigy 150 points

    The Gerber matches the datasheet. In particular, I'm looking at the dedicated TI datasheet for the footprint: https://www.ti.com/lit/ml/mpqf678/mpqf678.pdf This seems to match the TPMS datasheet as well.

    For what it's worth, I just received the EVM here and the solder on it looks absolutely great. The part is "floating" above the board by .1mm or so, whereas mine is sitting flat on the board. I did reduce paste on the center pads to avoid the float. Maybe I did absolutely the wrong thing and this is my fault. 

    I'm resubmitting a board today that will have no reduction on the center pads paste mask so that it exactly matches the ref design. 

    I had a similar problem on another DFN/QFN and extending the length of the pads solved that issue, and so I was headed in that direction with this as well. However, now I'm questioning if it's my own fault for reducing the center mask.