Interleaved CCM Totem Pole Bridgeless Power Factor Correction (PFC) Reference Design

Interleaved Continuous Conduction Mode (CCM) Totem Pole (TTPL) Bridgeless Power Factor Correction (PFC) using high-bandgap GaN devices is an attractive power topology due to its high power efficiency and reduced size. This design illustrates the use of a C2000™ MCU and LMG3410 GaN FET module to control this power stage. To improve efficiency, this design uses adaptive dead time and phase shedding methods. Nonlinear voltage compensators are designed to reduce overshoot and undershoot during transients. This design chooses a software phase locked loop (SPLL) based approach to accurately drive the totem pole bridge. The hardware and software used in this design help reduce your time to market.

characteristic

• ● With AC input (90-230Vrms), 50-60Hz and 3.3KW rated power on high voltage lines
• ● Peak efficiency is 98.75% and total harmonic distortion (THD) is less than 2%
• ● Provides powerSUITE support to easily adapt designs to user requirements
• ● Built-in frequency response analyzer (SFRA) to verify and design control loops
• ● Low zero-crossing distortion
• ● Explains the implementation of adaptive dead time, phase shedding and non-linear voltage compensator
• ● Power stage control can run on C28x CPU or parallel CLA