Category | Power Supply

Optimizing Control of Both the Synchronous Rectifier and Primary MOSFET in Flyback Power Supplies Improves Efficiency and Reliability

Posted on 04 May 2015

      Overcomes the limitations of Schottky diode rectifier designs without the complexity of traditional synchronous rectifier implementations By Silvestro Fimiani, Senior Product Manager, Power Integrations Designers of flyback power supplies have generally used Schottky diode rectification in the output stage due to its simplicity and low cost. Diode-rectifier designs have proven adequate in [...]

Philosophy of Topology and Components Selection for Cost and Performance in Automotive Converters

Posted on 17 February 2015

      The goal of this article is to draw the attention of power electronics design engineers who work, or are going to work, for the automotive industry. The general main requirements of electronics equipments for the automotive industry are Cost, Reliability, and Electromagnetic Compatibility (EMI). Obviously, this subject is too big for the [...]

The Power Supply Industry – What’s Happening?

Posted on 28 November 2014

      The power supply industry is in the middle of a period of change. New opportunities are growing quickly whilst established markets falter. Because of this, the global market for AC-DC and DC-DC power supplies is set for healthy expansion from this year until at least 2017; revenue during these three years is [...]

Optimising the Quasi Resonant Flyback Transformer

Posted on 14 November 2014

      Most of the Isolated Offline Power Supplies less than 100W are flybacks. These converters have many advantages over other topologies. It is the least expensive isolated topology because it uses the fewest number of components. The transformer behaves as a coupled inductor, which stores the energy in the gap. This eliminates the [...]

Optimized Core and Bobbin Allow for more than 25 Percent Increase in Power Handling

Posted on 15 October 2014

      DC/DC SMT transformer for PoE+, datacom, and industrial are the applications There are a wide variety of applications, including Power over Ethernet (PoE and PoE+), datacom/telecom and industrial, operating from a 12v, 24v or 48v input, that require an isolated switch mode power supply solution to convert the available input voltage to [...]

What to Watch for when Turning on a SMPS for the First Time

Posted on 10 September 2014

      In the near future, SMPS will completely displace conventional supplies, hence also engineers who are no specialists will have to cope with them. Turning on a new or unknown SMPS, especially offline - SMPS, can have unexpected and disastrous effects. This article describes some dangers, precautions and procedures for setting up and [...]

Comparing the Benefits of Using an Integrated Power Module versus a Discrete Regulator

Posted on 01 September 2014

      Today’s power systems for communications and computing infrastructure support high current loads from increasingly power hungry FPGAs, ASICs and microprocessors. To supply these high current circuits, equipment makers often rely on discrete power solutions that are complicated, take up valuable real-estate and may have significant power output limitations. By Chance Dunlap, Intersil [...]

Getting the Best Performance from AC to DC Power Supplies in Abusive Environments

Posted on 29 August 2014

      By Ira J. Pitel Ph.D., Magna Power Electronics INTRODUCTION Ac to dc power supplies can be found in applications where power needs to be processed from the ac power mains to loads requiring a fixed or variable dc voltage or current. While such equipment has few input and output connections, engineers frequently [...]

Flexible Power Based on a Modular Concept

Posted on 27 March 2014

      Ready-to-use inverters from the most varied manufacturers in diverse power classes simplify the realisation of projects because no expensive development of the electronic output stage is required. The user receives a complete and qualified solution, but variability and consideration of specific wishes are often neglected. VARIS™, the new modular inverter system, has [...]

SEPIC-Fed Buck Topology Boosts Performance in Non-Isolated DC-DC Converters

Posted on 06 March 2014

      A point-of-load (POL) converter is a step-down dc-dc converter designed to supply constant voltage to a load, (almost) independently of load currents. It has become a popular solution for a wide variety of applications: from networking and telecommunications to data-communications and computing applications. By Fariborz Musavi, Director of Engineering, CUI The use [...]