In the rapidly evolving landscape of artificial intelligence (AI), the demand for computational power has surged, placing datacenters at the forefront of technological progress. This increasing need for computational resources has led to a corresponding rise in energy consumption, currently estimated between 450 and 650 TWh/year and expected to reach 1000 TWh/year, driven by the emergence of the next-generation 2kW GPUs. Wide-bandgap (WBG) devices, including gallium nitride (GaN) and silicon carbide (SiC), offer the potential for up to a 1% efficiency improvement in applications such as state-of-the-art two-stage AC/DC converters, which currently achieve efficiencies of up to 98%. This paper proposes a novel quasi-single-stage AC/DC topology that relies on partial power processing to tight control both the input current and the output voltage. The eXtended Smart-Link (XS-Link) integrates both voltage and current regulation across the two stages of AC/DC converters, effectively reducing overall power losses and improving efficiency.
