For choosing topswitch in application note 16 (https://ac-dc.power.com/sites/default/files/product-docs/an16.pdf) is written start with the smallest TOPSwitch based on minimum current limit spec such that 0.9 x ILIMIT(minimum) ≥ Ip. So we can choose any topswitch with ILIMIT more than Ip/0.9 for a specified Ip(peak primary current) .
But in PI expert when I change the topswitch with more ILIMIT, this error appears : Peak flux density limit exceeded.Despite its ILIMIT has increased. I don't understand how can I choose topswitch.
Choosing topswitch based on current limit