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UCC28911: faulty Xcel calc tool ?

Part Number: UCC28911

1. The Xcel calculator tool states that Macros are to be enabled; but I dont see any Macros in the calc tool when I open it, so is this a false statement or did the Xcel tool load improperly?

2. I am suspicious because the tool isn't working properly; I see the switch freq changing when I change 'Lp', but not much else is changing or making much sense. Changing the 'Ripk' value seems to have no effect on any operating parameters which cant be right.

  • 1. I did not see the macros requirement. There is no such statement from my try.

    2. I think Lp can only affect supposed affected. I suggest you do a full design and after you done that design and feel something in question, you can manually check based on the equations in the datasheet. Or, provide your excel sheet to E2E and ask to help check your excel sheet to confirm ok or resolve potential problems.