Technical Articles

Universal AC Power Factor Correction Benefits from Adaptive Cell Topology

Universal AC Power Factor Correction Benefits from Adaptive Cell Topology

Because of the wide variation in AC line voltages around the world, universal power supplies are typically designed to accept 85 VRMS to 264 VRMS inputs. This range has imposed significant design tradeoffs on the power factor corrected AC rectification typically used in front end converters.

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Achieving Optimized, Minimum-component Input Filters for Transformer-coupled ZVS Buck-Boost DC-DC Converters

Achieving Optimized, Minimum-component Input Filters for Transformer-coupled ZVS Buck-Boost DC-DC Converters

Transformer-coupled ZVS buck-boost DC-DC converters provide highly efficient solutions for telecommunication power systems. However they may need input filters for protection from electromagnetic interference (EMI) and high frequency input noise. These filters must be stable over the operating frequency range.

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What is a Buck Regulator?

November 7, 2012
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We interviewed the VP responsible for the Picor product line, Robert Gendron, tapping into his knowledge about the design and performance considerations for buck regulators when powering embedded devices. Because it turned out to be such a great interview, with lots of great information, we’ll be posting his responses as a series over the next couple of months.

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Using 400 Vdc for Efficient Distribution of Data Centre Power

November 5, 2012
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Using 400 Vdc for Efficient Distribution of Data Centre Power

Within telecommunications and data centres, continuing growth in processing equipment’s power demand is imposing evolutionary change on the power architecture that feeds it.

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Low-voltage ICs in Power-hungry Data Centers Benefit from High-voltage DC Supply Path

October 29, 2012
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Low-voltage ICs in Power-hungry Data Centers Benefit from High-voltage DC Supply Path

As rail voltages drop and currents increase, the key to efficient power delivery is use of higher voltages and DC conversion and distribution.

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Factorized Power Architecture Delivers Maximum Efficiency and Density with Design Flexibility

October 3, 2012
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Factorized Power Architecture Delivers Maximum Efficiency and Density with Design Flexibility

In the drive to reduce distribution losses and improve overall system efficiency and density, power architectures have evolved from centralized power architecture (CPA) to distributed power (DPA) and, more recently, to intermediate bus architectures (IBA).

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What’s the Problem with AC-DC Front Ends?

October 3, 2012
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The first in a series of posts looking at how the performance of AC-DC front ends can be improved looks at the limitations and issues being faced.

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