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UCC29002: UCC29002 - Load share signal

user581824
Prodigy 10 points
Part Number: UCC29002

Hi

The company where I work have a project that use the UCC29002 and we are having problems with the LS signal: when we measure this signal in different boards with the same load, the signal is different. The output signal to load is same between boards. I would like to know how this signal LS should be and if exists some simulation tool for this component?

Output signal load: 5,2V

Current load: 3A

  • 0
    TI__Mastermind 40350 points
    Hello user581824,

    I will route your question to the appropriate team to help resolve it.

    Regards,
    Ulrich
  • 0 in reply to Ulrich Goerke
    TI__Mastermind 34465 points

    Hi,

    The LS (load share) signal is a command or error signal that is used to force all of the load sharing power supplies to output the same current. It is an error signal and it's purpose is to make each power supply contribute the same output current.
    It is natural for a different system of power sharing supplies to have a different LS value but the individual power supplies of a particular system must have the same LS value since they are wired together.   If your system is working properly the output current of each power supply should be the same for the same load conditions.

    And that's regardless of the LS value.

    Regards,

    John Griffin