SLUSC60B December 2017 – October 2019 UCC28064A
The selection of Q1, Q2, D1, and D2 are based on the power requirements of the design. For an explanation of how to select power semiconductor components for transition-mode PFC preregulators, refer to UCC38050 100-W Critical Conduction Power Factor Corrected (PFC) Pre-regulator.
The MOSFET (Q1, Q2) pulsed-drain maximum current is shown in Equation 38:
The MOSFET (Q1, Q2) RMS current calculation is shown in Equation 39:
To meet the power requirements of the design, IRFB11N50A 500-V MOSFETs were chosen for Q1 and Q2.
The boost diode (D1, D2) RMS current is shown in Equation 40:
To meet the power requirements of the design, MURS360T3, 600-V diodes were chosen for D1 and D2.