Rack-Level DC Power Solution for Volume Servers

System-Level Requirements of DC-DC Converters for Dynamic Power Supplies of Power Amplifiers

The energy efficiency of battery-operated portable applications can be improved by increasing the efficiency of power amplifiers (PAs). By dynamically changing the supply voltage from the fixed battery supply using a DC-DC converter, the PA can be operated with high efficiency during power back-off. This paper presents the system level requirements for a buck converter and other blocks in a dyn...

RackCC: Rack-level Congestion Control

Many data center traffic patterns exhibit abundant concurrent connections and high churn. In the face of these characteristics, server-centric congestion control is a poor fit—each connection, no matter how small, must start from scratch testing when and how much to send along a given path. This is despite the fact that there are a large number of flows that may have already probed the exact sa...

A DC-DC Converter Efficiency Model for System Level Analysis in Ultra Low Power Applications

This paper presents a model of inductor based DC-DC converters that can be used to study the impact of power management techniques such as dynamic voltage and frequency scaling (DVFS). System level power models of low power systems on chip (SoCs) and power management strategies cannot be correctly established without accounting for the associated overhead related to the DC-DC converters that pr...

Five Level Dc-dc Converter with Asymmetrical Control Strategy for High Power Applications

In this paper an asymmetrical duty cycle control strategy was proposed to the TPTL dc/dc converter. The modified converter remains all the advantages of original control strategy; meanwhile, soft-switching can be achieved using the energy stored in output filter inductance and leakage inductances of transformers (or resonant inductances).Three-phase three-level (TPTL) dc/dc converter has the ad...

Novel DC/DC Converters For High-Power Distributed Power Systems