Christian Rainer, Roberto Rizzolatti, S. Saggini, Mario Ursino
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Lossless Current Sensing Method for Hybrid Switched Capacitor Converter
Several applications are migrating to a 48-V power-delivery architecture, including hyper-scale data-centers and artificial intelligence (AI) server-racks power distribution. High level trends of AI applications pushes computation aggressively towards sensors and actuators, opening considerable research and business development windows. Within the 48-V power-delivery architecture, new intermediate bus converter (IBC) solutions so called hybrid switched capacitor converter (HSC) [1] for high efficiency and high power density applications are becoming essential. To increase the IBC robustness and current sharing quality this paper is proposing a lossless current sensing method for an HSC converter with autotransformer. Experimental results on a 450 W 48-V to 6-V HSC module are showing the effectiveness of the proposed solution.
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