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TPS54360B: What is the current sense resistor and slope compensation in TPS54360B?

Ye Zhao
Prodigy 170 points
Part Number: TPS54360B
Other Parts Discussed in Thread: TPS54361, TPS54360, LM76003

hello TI engineers

I would like to use TPS54360B for make a negative voltage of -15V, with input voltage 24V.

I would like to use TPS54360B as in a buck-boost converter.

My questions are:

1) What is the current sense resistor in TPS54360B? 

In my opinion, Rsen = 1/gm_ps = 1 / (12 A/V) = 1/12 ohm. Is this correct?

Reference: SLVAE22A–July 2018–Revised March 2019

2) And what is the slope compensation Se? I didn't find anything about it in the datasheet

In the following reference (family excel tool), it shows Se = 1 A/V

I think Se should have a unit as V/Sec or V/uSec

Can you please give me a better explanation and definition on Se?

Reference: 

CALCULATION TOOL, TPS54360 and TPS54361 Family Design Excel Tool (Rev. E), SLVC452E.ZIP (245 KB)

3) Is there any other better solution to create a +24Vin, -15Vout and 1A non-isolated DC-DC converter?

Thanks

Ye