TPS54340: What are these columns in the SWIFTINV-CALC spreadsheet?

Benjamin

Part Number: TPS54340
Other Parts Discussed in Thread: LMR14050

I am using the Swift inverse Calculator spreadsheet from the TI website (SWIFTINV-CALC-REVE) to create buck-boost-inverting circuits.

It’s super helpful, but I don’t know what these extra columns are for on the right when calculating the compensation components (see pink arrows).

So my questions are:

- Should I be trying to aim for the values on the left, or somewhere in between the values on the left and the values in pink?

- Does anyone know if there is a plan to make an updated version of this for more modern components? Parts like the LMR14050 for example? This spreadsheet is incredibly useful for so many people, yet it hasn't been updated for so long.

- The Webench doesn't want to recognise any integrated switch components for Buck boost inverter. Why is that?

Thanks!

over 5 years ago

0 Frank De Stasi over 5 years ago

TI__Guru 65665 points

I believe that the values in column D are the next standard values of component.

The value in column C is the calculated value. It should pick the next standard value and put in column D

0 Benjamin over 5 years ago in reply to Frank De Stasi

Prodigy 250 points

Hi Frank thanks for the reply, but I don't think that is the case.

in the example on screen you can see that the calculated value is 11.232k but the value in column D is 49.9k.

Upon closer inspection I think this value isn't linked to any other equations. Just a constant value. So I guess I Should just try and get as close to Column C as possible?

0 Frank De Stasi over 5 years ago in reply to Benjamin

TI__Guru 65665 points

Yes, I would use the value in C

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TPS54340: What are these columns in the SWIFTINV-CALC spreadsheet?