SLUSC60B December 2017 – October 2019 UCC28064A
Resistor RC is selected to minimize loading on the power line when the PFC is disabled. Construct resistor RC from two or more resistors in series to meet high-voltage requirements. Resistor RD is then calculated based on RC, the reference voltage, VREF, and the required output voltage, VOUT. Based on the values shown in Equation 50 to Equation 53, the primary output overvoltage protection threshold should be as shown in Equation 54:
Select a standard value for RD.