UCC28950EVM-442: Need help to design Shim Inductance to design 4KW Phase shift full bridge Converter

Please refer to the below e2e post about shim inductance selection.c

https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/957006/ucc28951-how-to-select-or-design-shim-inductor-for-psfb-topology

I used this below link but still I got wrong value,I don't know .

I used this formula  LS ≥ (2 × COSS_QA_AVG*( (VINMAX) ^2 / (IPP 2 − ΔILOUT 2 × a1 )^2)) − LLK  and I got 1.4nH 

Can u please calculate Shim Inductance value for above spec and provide correct Shim Inductance value for our design?.

Can you please put your design parameter in this tool to calculate the inductance? https://www.ti.com/tool/download/SLUC222

If you still have an issue, please share the calculator you used.

Thanks,

Ning

If I rearrange the above formula we can find Lsh .If I use this formua ,I got 5.6uH Shim Inductance value.

The Excel tool give me a value of 2.4nH .Which one is correct .

2.4nH doesn't make much sense because it is too small. Something is missed in your calculation. I still recommend to use the calculator for SLIM .What is transformer turns ratio? what is Llk and Lmag?