Technical Articles

48 Vdc Distribution; a Safe, Practical and Efficient Solution for Equipment Racks

April 5, 2013
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48 Vdc Distribution; a Safe, Practical and Efficient Solution for Equipment Racks

Vicor’s new AC Front End Module has an isolated, regulated output of 330 W at 48 Vdc. Its applications are many and varied, including powering rack-mounted equipment in telecommunications or data centres. However designers for such applications sometimes ask why the DC output has been set at 48 V rather than 12 V, or even 5 V?

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400V DC Power Distribution Improves Efficiency for Telecom and Datacom Applications

With telecom and datacenters becoming ever more important to our work and leisure activities, the demand placed upon these applications is increasing dramatically. Every percentage-point increase in efficiency results in significant cash saving for the operator – and hopefully, the customer – in the cost of wasted power.

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What to Consider when Choosing a Buck Regulator

March 4, 2013
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What to Consider when Choosing a Buck Regulator

In our previous post, an interview with Robert Gendron, VP, Strategic Marketing and Business Development for Picor, we asked, What is a Buck Regulator? In this second in the series, we look at how to choose the product that is right for your design.

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Why Optimize Buck Regulators for 8V-18V Operation?

Why Optimize Buck Regulators for 8V-18V Operation?

Over the past few months, I have published a few articles discussing the advantages of our soft turn on ZVS Buck topology when it is applied to a wide ranging (8V-36V) input voltage combined with large step down ratios of as much as 36:1.

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Fast, Online Simulations Shape Advanced Power Supply Architectures

Fast, Online Simulations Shape Advanced Power Supply Architectures

The task of the power system engineer grows steadily more complex. At the level of individual PCBs, semiconductor devices – microprocessors, FPGAs and the like – demand a range of discrete voltage levels, frequently at around 1 V and at currents of tens of Amps. The physics of distributing power at these levels mandates regulation as close to the point-of-load as possible: I2R losses and minute but inescapable inductances are always poised to degrade the performance of low-voltage, high-current paths that see rapid step-changes in power demand. At the other end of the power-conversion...

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Synthesis of Input Line Current in Power Factor Correction Control

Synthesis of Input Line Current in Power Factor Correction Control

Last year, Vicor presented a poster session at PCIM Europe in Nuremberg, Germany. Below is the paper from the show. Vicor will again be attending and presenting at this year’s event. Here’s a link to the conference program PCIM Europe 2013. PCIM Europe 2013 (14-16 May in Nuremburg, Germany).

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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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