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TPS56121: TPS40K spreadsheet vs Web Bench

Ray Vincent Aranzaso
Genius 13495 points
Part Number: TPS56121
Other Parts Discussed in Thread: TPS56221, TPS65121

Hi,

Good Day. I have a customer who has a query about TPS56121. Please see below for your reference. Thank you very much.

I have a question concerning the TPS40K spreadsheet vs Web Bench when I switch from a design based on the TPS56121 to the TPS56221.
We would like to use both in our designs. The spec sheet for both parts appears to have identical low frequency driver gains.
Using The TPS40K _compensataor spreadsheet and switching from TPS65121 to TPS56221 results in a low frequency driver gain change of 15.5 to 19 dB or close to 3dB for identical designs. Web bench for the same components results in identical Fc and PM for the two parts. Is web bench correct or the TPS40K spreadsheet?
Can I get an un-protected version of the spreadsheet? I would like to extract the driver equations for the part and covert to a Mathcad file to speed up the design process.

Best Regards,

Ray Vincent