White Papers

White Paper: Leveraging Bus Converters in Regulated DC-DC Applications

July 3, 2014
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White Paper: Leveraging Bus Converters in Regulated DC-DC Applications

This paper, presented at PCIM 2014 by David Bourner, one of our applications engineers, provides a comparison between Factorized Power Architecture (FPA) and the Yeaman Topology in a regulated, high density DC-DC application. It describes a variant on FPA that utilizes a Power Component Methodology, and compares FPA solutions against the Yeaman Topology. A description of the investigation methods used and outcomes of various tests to establish performance metrics follow. Practical aspects of applying power components to both FP and YT architectures are followed by a summary of salient attributes for each system. The Yeaman...

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White Paper: Optimize Thermal Management of ChiP Products

March 4, 2014
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White Paper: Optimize Thermal Management of ChiP Products

The ChiP Platform provides a dramatic improvement in thermal management, allowing cooling through both the top and bottom sides of the package, as well as the leads. The thermal performance of this new packaging technology helps power system designers keep pace with the demands to increase power density at a greater rate than improvements in converter efficiency.

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White Paper Explains How ZVS Technology Enables Higher Power Throughput in Buck Regulators

January 28, 2014
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The efficiency of conventional hard-switched niPOL regulators drops as the step-down ratio increases, and falls dramatically when required to accept a wide input range with step down ratios approaching 36:1. This means that designers have been forced to incorporate multiple converter stages, limiting the step-down ratio of each stage to maintain efficiency at acceptable levels.

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Techniques to Deal with Beat Frequencies Caused by Paralleling DC-DC Converters

December 6, 2013
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Power system designers are frequently required to develop solutions that provide more power than can be delivered by a single converter. Paralleling is a common technique, where the outputs of more than one converter are linked together to increase output current, and therefore output power. One problem with this approach is the generation of beat frequencies on the inputs of the converters.

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New white paper: high-voltage DC distribution is key to increased system efficiency and renewable-energy opportunities

August 13, 2013
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New white paper: high-voltage DC distribution is key to increased system efficiency and renewable-energy opportunities

The pressure throughout the energy supply chain to deliver electrical power more efficiently is intense and growing.  Partcularly given the enormous growth in high load applications such as datacenters. The latest white paper from Vicor highlights how a transition to 400 VDC for power transmission and conversion offers tangible and significant benefits for both sourcing options and system performance

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How Adaptive Cell Topology Benefits AC Applications

June 11, 2013
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With the wide variation in AC line voltages around the world, universal power supplies are typically designed to accept 85VRMS to 264VRMS inputs. This range has imposed significant design trade-offs on the power factor corrected AC rectification typically used in front end converters. The Vicor PFM isolated AC-DC converter with PFC, and the AC Front End Module both have Adaptive Cell™ topology at their heart, providing a breakthrough in AC front end power factor correction that addresses these trade-offs to provide a consistently efficient solution. It does so by introducing innovation at three different...

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Designing Power Distribution Networks for Automated Test Equipment

January 3, 2013
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The demands on power architectures designed for automated test equipment (ATE) applications have increased dramatically as these systems become more complex. Only a few years ago, many ATE systems used simple “silver box” supplies, but this is no longer a sustainable approach. Modern ATE circuitry requires more power to operate, whilst voltage and current requirements span a wide range. At the same time, these power systems need to accurately and quickly modulate various voltage rails in order to completely characterize the performance of a device under test (DUT). The power system has therefore become...

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