The values in the small control board in the UCC28950EVM do not match the ones calculated in the SLUA560B. Compare for example R3, R4 that instead of 30,1K are 15,4K.
The problem is that the PCB IS WRONG! The connexion from the IC pin CS to CS and VREF has errors.
Instead of correcting the PCB, TI has set ADEL and ADELF to 0 and has changed the resistence values. I f you want to experiment with other fixed voltages in this pins, this is not possible. Owing to the PCB error R16 and R19 cannot be connected to Vref.
The document SLUA560B shows the values and thbe schematics that should exist. The document SLUU421A shows the values that are mounted and the schematic with the PCB errors. I have not found any TI document explaining the error.
By the way, the graphs for the delays A-B and C-D in the datasheet are wrong. TI was aware of it long time ago. In my knowledge they have not yet been corrected.