Part Number: LM22678
Other Parts Discussed in Thread: LM61460

LM22678-ADJ is used, the input voltage range is 19V-28.8V, and the simulation with WEBENCH for 12V 5A output is failed.
Why?
How is it calculated?
Please recommend a material to achieve the input voltage range of 19V-28.8V, and output 12V 5A ----- minimum load of 3A;