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Bodos Power Systems - who has written 804 posts on PowerGuru – Power Electronics Information Portal.

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DC-Link Capacitor Technology Comparison

Posted on 20 May 2015

      Aluminum Electrolytic vs. Film Capacitors By Dr. Arne Albertsen, Jianghai Europe Electronic Components GmbH Introduction The progress in semiconductor design sets the trend in current and future devices of power electronics: it manifests itself particularly in smaller dimensions, as well as in higher voltages and switching frequencies. Referring to intermediate circuit capacitors, [...]

New 800A/1200V Full SiC Module

Posted on 06 May 2015

      By using SiC-based semiconductors the performance of power electronic systems can be drastically improved. By Eckhard Thal, Koichi Masuda and Eugen Wiesner, Mitsubishi Electric Europe B.V., Ratingen, Germany The evolution of SiC technology in power modules and its principle loss reduction potential are shown in Figure 1. Mitsubishi has developed two new [...]

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 [...]

Ensuring System Efficiency

Posted on 29 April 2015

      Four Key Features to look for in a GaN-Ready Magnetics Supplier The dramatic rise in the popularity of Galium Nitride (GaN) switching technology is due to the very significant benefits it provides. Highly efficient GaN devices offer high dielectric strength, high operating temperatures, high current density, high-speed switching and exceptional carrier mobility. [...]

Performance Comparisons of SiC Transistors, GaN Cascodes and Si - Coolmos in SMPS

Posted on 20 April 2015

      How do available SiC - transistors and GaN cascodes stack up against Si - Coolmos in real-world SMPS? Proven by extensive tests, neither SiC transistors nor GaN cascodes beat Si Coolmos. Alleged advantages of GaN are due to the cascode, not the material. By Dr. – Ing. Artur Seibt, Vienna Introduction and [...]

Using “Normally on” JFETs in Power Systems

Posted on 17 April 2015

      A “normally on” device can get short shrift at times due to the negative turn off voltage requirement. Supply Voltage sequencing and single point failures tend to make designers skittish, and thus bypassing the die size/resistivity advantages of “normally on” devices, and the capacitive advantages that go along with using devices with [...]

A High Current, Low Inductance Wide Bandgap Power Module for High Performance Motor Drive Applications

Posted on 09 April 2015

      Over the past decade, substantial effort has been devoted to mature and commercialize wide bandgap power devices [1,2] for discrete and multi-chip power modules (MCPMs) meeting the demands of power electronic systems which include high speed motor drives [3], down-hole drilling [4], hybrid-electric and all-electric vehicle chargers [5], and solar/ wind inverters [...]

Power Modules Win Out, but Choose Wisely

Posted on 02 April 2015

      Power modules are the way to go when it comes to leveraging the expertise of power experts and getting your design to market quickly, but choose wisely. Power-module architecture choices can greatly affect your power supply’s performance. By Jian Yin, Intersil Corporation Whether evaluating step-down switching regulators at the silicon-level (controller with [...]

A Low-Cost LED Driver Module, 0.5 A/33 V

Posted on 31 March 2015

      For general use, with efficiency above 90% This article describes a simple constant current driver module with fast PWM input that can be used for driving mid and high power LEDs. By Valentin Kulikov, FuturoLighting This module operates from 8V to 33V and the output current can be configured from 0.1 to [...]

Angle Sensor Devices in On-Axis and Off-Axis Applications

Posted on 10 March 2015

      This article provides a basic under- standing of how Allegro’s precision Circular Vertical Hall based angle sensor integrated circuits are used in on-axis and off-axis applications. Allegro MicroSystems, LLC Hall based angle position sensor ICs are increasingly preferred over other Hall and non-Hall based sensor solutions for position monitoring applications. They are [...]