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TIDA-01494: discrepancy between BOM and gerbers/assembly drawing

jb nouvel
Prodigy 120 points
Part Number: TIDA-01494

Hello,

We are building the TIDA-01494. PCBs were made but when came assembly time we discovered some issues.

For instance:

In the BOM, C22 is 4u7/100V/1210, but the corresponding footprint is 0603 (located in a low voltage area).

C11 pitch is 22.5mm in the BOM, but 15.24mm in the gerbers.

L4 is SMD in the BOM when the PCB is THT.

Can you please share the BOM that coerresponds to the published gerbers?

Many thanks,

Jean-Baptiste.

  • 0
    TI__Expert 6090 points

    Hi, 

    All I have is the file same with TI.com.

    Let me try to contact this original designer, to see if he has kept it.

  • 0 in reply to Desheng, Guo
    Prodigy 120 points

    Thanks - fingers crossed.

  • 0 in reply to Desheng, Guo
    Prodigy 120 points

    Hello,

    any success there?

    Our engineer has just listed to me more discrepancies.

    In some cases we can guess what the solution is - in some other cases not.

    Thanks.

  • 0 in reply to jb nouvel
    Prodigy 20 points

    Hello,

    I found especially some inconsistencies in part references between schematics/BOM and PCB/assembly drawing:

    in the LLC controller region:

    • Q14
    • Q4
    • R14
    • C21
    • R2
    • R25
    • C22
    • Q13
    • Q14
    • D12

    in the PFC controller region:

    • D14

    in the inrush limiter region:

    • R62
    • R63
    • R65
    • R66
    • D8
    • C58


    (all the above components exist on the PCB but not in the current schematics neither in the BOM)


    It would be nice to get the last version of the schematics to figure out what are the modifications applied on the initial design and get a chance of having something working at the end...

    In addition to that list, I'm wondering why the R31 R22 R10 series resistors (1K5) are connected from mains voltage to the HV pin of U2 (pin1 of the LLC controller). It seems to be dangerous because in the DS of U2 it is stipulated that this pin should be tied to PGND (not mains !).

    Thanks a lot in advance for helping us !

    Regards,

    Pierre

  • 0 in reply to VAYSSE Pierre
    TI__Intellectual 2815 points

    Dear Pierre,

    Please use the latest design files online to generate the board manufacturing and assembly files. This will eliminate the mismatches you see.

    For the U2 controller, there are variants of the ic for which we use the HV startup, so the resistors R31, R22 & R22 are populated. When you use the version UCC25630-3, you could depop them if you need.

    Best Regards,

    Ram