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UCC29002: schematic check

Tommy Tzeng
Genius 5135 points
Part Number: UCC29002

Tool/software:

Hi Team,

could help check this schematic is ok? or there any suggestion and modify? thanks for your support.

UCC29002 (1).pdf

  • 0
    TI__Mastermind 32500 points

    Hello Tommy, 

    Thank you for your interest in the UCC29002 load-share controller. 

    The UCC29002 requires access to the remote-sense input of the power supply unit (PSU) at CN1 and CN2, but there is no pin on either connector for that. 
    I am assuming that the PSU for each input VIN1 and VIN2 are identical. 

    If the PSU does not have a remote-sense input, then the UCC29002 cannot be used unless the feedback sense point can be accessed and disconnected at the PSU.
    In any case, each ADJ signal needs a dedicated pin in the respective PSU connectors.

    Other issues: 
    1. VCC for each UCC29002 should be connected to VINx of their respective PSU connectors. 
    2. Disable switches Q15 and Q16 are only needed if the application requires that either of the load-share controllers must be disabled at some time for some reason. 
    3. The Excel design tool  https://www.ti.com/tool/download/SLUC684 should be filled out with the target parameters for this application to determine the supporting component values.  The voltage-loop gain curve of the PSU will be required to design the load-sharing. 
    4. The UCC29002 datasheet  https://www.ti.com/lit/gpn/ucc29002 should be read thoroughly to gain an understanding of how this load-share controller works. 
        The lack of an ADJx pin on CN1 and CN2 suggests that the voltage-adjustment concept for load-sharing is not fully understood. 

    Regards,
    Ulrich