Tool/software: WEBENCH® Design Tools
I used Webench to do a design with these parameters:
The result used a UCC2813DTR-0.
The transformer was specified as follows:
My transformer guy's design put the Rs2 resistance at close to 100 m-ohms instead of 700 u-ohms. I believe that this winding in the one that provides VCC to the UCC2813.
My questions is this: Does this resistance really need to be that low?