150W, AC-19.5VDC PFC+LLC Demo Board This design uses a Critical Conduction Mode (CrCM/DCM) PFC (AC-400 VDC), followed by an LLC DC-DC (400-19.5 VDC). For both stages, the switching frequency was increased to the maximum allowed by the off-the-shelf control ICs available. The board is designed to be a ‘demonstration’ board, and is not yet optimized as a production design. With this design, a power density of 1.56 W/cc or 25.5 W/in3 is achieved, which is around 2x typical and 40% more than the best-on-class Si-based design today. Customer designs are expected to achieve even higher power density.