Equation 7 on page 17 of rev C of the UCC28513 datasheet does not seem to be correct. By my analysis, there's an extra -1 term in the denominator. Using the component ref des as in Figure 1, I get
Imax = Vref * R7 / R14 / R2
This seems to agree with the description for PKLMT UC3854 discussed in https://e2e.ti.com/support/power_management/isolated_controllers/f/188/p/83332/525279#525279
Please confirm my equation or provide more details on the derivation of the equation in the datasheet.