Hello
1.Datasheet contains a Chapter “Application and Implementation”. This chapter is an example of calculation of converter with numerical data for this particular converter. Formulas 151 and 154 in this chapter use parameters CS and KA, but I could not find any numerical value for these parameters, calculated or set before it have been used in these formulas.
2. There is a circuit diagram on page 1 of datasheet. On this diagram dividers RAHI&RA and RAEFHI&RAEF are connected to CS pin of controller. But on page 38 (Figure 48) these dividers are connected to VREF pin. At the same time, on page 20 it says that this divider connected to CS(“RA and RAHI define the portion of voltage at pin CS applied to the pin ADEL (See Figure 48)”) . On page 55 these dividers are connected to CS. On page 62 these dividers are connected to VREF but also can be connected to CS. Note that in your Excel calculation tool (SLUC222D) these dividers are connected to VREF. I could not find any explanation for this.