Controlled-Bus Architecture with Voltage Equalization: a System Approach to Higher Efficiency in Low Voltage DC Distribution

May 23, 2013

At PCIM Europe 2013, Vicor presented a paper describing how “Central Offices” for Telecommunications have been historically powered by a wide range, negative-referenced 48V distribution system. The need for simple, direct battery-power backup has been the main driver behind this choice, which is regulated by global organizations standards. The relative simplicity of this distribution scheme has an immediate implication: line-card and server power systems need to accommodate for the wide input voltage range, which implies reducing both distribution and power conversion efficiency. As power levels increase, system designers are challenged to thermally manage more and more power. This paper describes an architectural approach (enabled by a particular converter configuration called “equalizer”), which not only increases the overall power system efficiency but also reduces the losses on line cards and servers.

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Other Presentation Paper Given at PCIM 2013

Control of a Discontinuous-Conduction-Mode ZVS Buck-Boost Topology for Microprocessor Core Power

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