3.6 kW Bridgeless Totem-Pole PFC with Synchronous SiC MOSFETs

This reference design demonstrates the application of Wolfspeed’s C3M™ 650 V Silicon Carbide MOSFET Technology in TOLL (TO - Leadless) Package to create a 3.6kW bridgeless totem-pole PFC for server power supply, data center power supply, mining power supply, and telecom systems. Wolfspeed’s C3M™ 650 V Silicon Carbide MOSFET in a TOLL package offers low conduction and switching losses, which further enables smaller, lighter and highly efficient power conversion systems. The design accomplishes:

• Peak efficiencies of 99%
• Suitable for use in 80+ Platinum/Titanium, Energy Star, Lot9, and OCP3.0 supplies
• Power density of 92 W/in³
• 60 kHz switching frequency

This reference design is offered as a comprehensive design package which can be used as a starting point for new designs with Silicon Carbide power devices.

Ratings

• Input voltage range: 180-305VAC
• Output Voltage: 440VDC
• Output Power: 3.6kW (Derated at low line)
• Switching Frequency: 60kHz
• Peak Efficiency: 99%
• Forced air cooling