Part Number:UCC28780
I am having trouble with calculations coming out wrong in the sluc644 Mathcad worksheets for this IC. In another thread I was told that I should arbitrarily override a couple of the calculated variables. This makes me really uncomfortable -- it means the worksheet calculations are wrong or incomplete, and I also don't know what the downstream effect would be of jamming in values in like this.
Can someone help me fix the worksheets so my ROPP no longer comes out negative? I have been tracing back through the equations with no success. The worksheets are a great help when they work, but when they don't it is really difficult to figure out where the problem lies.
I have made a number of changes to the worksheets and can provide my versions. I have different operating conditions and components than the worksheets were originally written for.