Part Number: UCC28780
We have several dc-dc modules designed with UCC28780 controller.
We obtain all design values from the spreadsheet SLUC664b.
Consider a design with 380V DC input with very little input ripple, output 5v/4 amp, we use NV6117 primary GaN and EPC output sync rectifier using UCC7138 controller.
A lot of values in the spreadsheet come out "####", or " divide/0" or negative in DC-DC converter case.
If we use all the ac input values by default, we get no such error results.
Will highly appreciate if you can point out why the DC-DC case does this & how to input several of the ac case inputs that are consistent with the formulas used behind the scene and yet not conflicting with our DC input(Please visit the site to view this file).
Pl see attached example .
robin