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UCD90240: MON[x] and EN[x] Dependence

Ryan.Bishop
Expert 3900 points
Part Number: UCD90240

Hello,

I have a customer that would like to monitor different rails than they are enabling.

They have 24 rails to monitor, and will enable 18 of them. So for MON[0:17] and EN[0:17] they each are directly related and monitoring/enabling the same rail.

However, the trouble is for the remaining 6 rails. They will use MON[18:23] to monitor them, but would like to use EN[18:23] to enable completely separate regulators. The fusion GUI only allows you to setup 24 rails though. So in the GUI we can make 18 rails for MON[0:17] / EN[0:17], and then another 6 rails for MON[18:23], but then we are unable to make an additional 6 rails for EN[18:23].

Is it possible to have MON[x] and EN[x] be configured independent of each other? If so, how can this be achieve with the 24 rail limit on the GUI?

Thank you!

Ryan B.

  • 0
    TI__Guru 60800 points
    Hi Ryan
    The MON and EN are totally independent. Users can do its own combination with GUI.
    GUI assigns MON and EN pin by the numeric order, Users can just click the assigned MON/EN Pin( it it s a hyperlink) again to choose varios pin options.
    Regards
    Yihe
  • 0 in reply to yihe
    TI__Expert 3900 points

    Hi Yihe,

    Sorry for the late follow up. Thanks for clarifying my understanding, I do have one more question.

    Are there any concerns if I configure a rail in the tool to monitor one voltage but enable a different voltage? I'm a little worried that some "cause and effect" could happen. For example, if we configure rail #1 in the tool to monitor/enable different rails, and say we disable rail #1, will rail #1 still monitor the voltage?

    I hope that makes sense.

    Regards,

    Ryan Bishop

  • 0 in reply to Ryan.Bishop
    TI__Guru 60800 points

    Hi Ryan

    It is not a common use case. Device always monitor the input all the time regarldess the EN. But when the monitoring rail has a fault, device may shutdown the EN if a proper fault response is set. you have to be carefully about what you plan to do.

    Regards

    Yihe