350W, 374 to 425V AC to DC Single Output Power Supply for Desktops and Servers

350W two phase interleaved power factor corrected pre-regulator. This power converter achieves PFC with the use of the UCC28528 PFC/PWM controller along with the UCC28220 interleaved PWM controller that is used to interleave the two power stages. The converter also has a 2W auxiliary bias supply that supplies power to the converters gate drive and PWM/PFC circuitry