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UCC28742: SLUC652b Calculator - Undefined Values

Part Number: UCC28742


Tool/software:

Hello,

I am trying to use the design calculator tool (SLUC652b). I have inputted my values and chosen a desired minimum valley voltage of 0V. This leads to a recommended input bulk capacitance of 13.7 uF. However, when I then input 13.7 uF as the actual bulk capacitance, it breaks the calculation for many other cells resulting in #NUM!.

Am I using the tool incorrectly? I have also noted in the default values in the tool that a minimum valley voltage of 50 V is chosen. It was my understanding that you wanted to minimise this value to improve efficiency? 

I have attached the calculator in its current error state.

Kind regards,

Tom

UCC28742 Calculator.xlsx