Data center electricity consumption has been in-creasing rapidly in the last few years as computation moves into cloud computing [1]. In order to reduce the conduction losses in the DC bus, recently 48 V has been proposed to replace the existing 12 V bus voltage. In an attempt to adapt the old 12 V infrastructure with the new one a DC-DC converter can provide the interface between the 48 V bus and the regulated 12 V rail. This paper focuses on a novel cascaded converter consisting of a resonant switched capacitor converter and a novel dual phase three-level buck converter, which intrinsically enables flying capacitor balancing throughout inductive energy. Experimental results for a 600W prototype in 8th brick low profile achieving 1.846kW /in3 power density, are showing the effectiveness of the proposed approach.

Novel highly efficient Two-stage regulated 48 v - To - 12 v converter with dual phase 3-level buck converter featuring natural voltage balancing

Rizzolatti R.;Saggini S.;
2023-01-01

Abstract

Data center electricity consumption has been in-creasing rapidly in the last few years as computation moves into cloud computing [1]. In order to reduce the conduction losses in the DC bus, recently 48 V has been proposed to replace the existing 12 V bus voltage. In an attempt to adapt the old 12 V infrastructure with the new one a DC-DC converter can provide the interface between the 48 V bus and the regulated 12 V rail. This paper focuses on a novel cascaded converter consisting of a resonant switched capacitor converter and a novel dual phase three-level buck converter, which intrinsically enables flying capacitor balancing throughout inductive energy. Experimental results for a 600W prototype in 8th brick low profile achieving 1.846kW /in3 power density, are showing the effectiveness of the proposed approach.
2023
978-1-6654-7539-6
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11390/1251906
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