The boost converter is the most common converter topology used for Power Factor Correction due to it’s low cost. This page shows some of the advantages and drawbacks of boost converters. Only one MOSFET is required and it’s driver/control voltage is referred to ground which simplifies the driver circuitry. Properly designed, it can deliver efficiency well above 90% with the right techniques. Using a single winding choke, the magnetic element has no problem with coupling or leakage inductance but must be able to handle high peak currents gracefully. The rectified bus voltage must be greater than the peak AC input voltage and the MOSFET must have a fairly high voltage capability because peak overshoots may extend VDS requirements by 15% over the typical output of 400 volts. The output capacitor requirements are somewhat demanding and must support high RMS ripple currents and for CCM mode high peak currents. Using both an electrolytic and film capacitor in parallel is often recommended. Last, in continuous conduction mode, the diode must be very fast with minimal Reverse Recovery Charge (QRR) to get high efficiency and reliability.