LM5180-Q1: detail information of Rset & Vref

Tool/software:

could you help me verify the my understanding for the information of datasheet?

I find the Vref in the datasheet in the figure of function diagram(follow the figure in page 9), but I don't find the maximum(minimum, typical) value of Vref in the datasheet.

https://www.ti.com/lit/ds/symlink/lm5180-q1.pdf?ts=1718078466150&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252Fzh-tw%252FLM5180-Q1

so I keep find the detail information in the datasheet(page11).  the equation is needed to use the Vref to calcalate the RFB.

but the other equation is different from the the other equation(page 25) these let me feel more confused about the two equations.

https://www.ti.com/lit/ds/symlink/lm5180-q1.pdf?ts=1718078466150&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252Fzh-tw%252FLM5180-Q1

LM5180 have the internal current source to output to Rset and make the constant Vref voltage to do the closed loop control?

Delta-Asker Cheng