GaN’s Tipping Point – Why GaN in AI Server?
In facing the transformation of energy efficiency, EPC and Power Electronics Lab of NTUST embrace the same vision of contributing to create a better world supported by extensive applications fuelled by gallium nitride-based power electronics technology.
Introduction - AI Server Demand Accelerates DC-DC and AC-DC Converter Development
Speaker: Josh Feng
Session 1: Exceeding 5kW/in3 in a high density 48V-12V DC-DC converter
Speaker: Michael de Rooij
Details of a 1kW reference design, with performance measurements, will be presented that covers device choice, transformer integration and over-coming testing challenges.
Session 2: Using a multi-level PFC topology to shrink the physical size while exceeding 99% efficiency in an AI PSU (power supply unit)
Speaker: Michael de Rooij
Multi-level PFC has proven to increase power density in high power server PSU without compromising efficiency. Details, including design and measurements, of a proof of concept converter will be given followed by design details of a 4.8 kW version. The synergy between AC-to-DC conversion leads to expansion of multi-level topology in motor drives and details of the benefits and approach will also be covered.
Session 3: High-density high voltage to low voltage isolated Conversion
Speaker: Michael de Rooij
The final section presents work on the isolation stage in the complete converter chain that meets the safety requirements between the grid and server. Two approaches will be covered; 1) a phase shift resonant bridge converter with active clamp and 2) a 4 cascade LLC converter with very high power density.
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