Author Archives | Bodos Power Systems

Bodos Power Systems - who has written 799 posts on PowerGuru – Power Electronics Information Portal.

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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 [...]

4in1 400A/1200V Module with T-type Topology for 3-Level Applications

Posted on 02 March 2015

      A growing demand for 3-level inverter technology combining reduced power loss and increased power capacity is originating from power conversion applications like wind and PV inverter as well as from industrial equipment such as uninterruptible power supplies (UPS) and recently active front ends of 4-quadrant drives. By Marco Honsberg and Thomas Radke, [...]

Unlocking Digital Power

Posted on 18 February 2015

      This is a story of change, a story that began 5 years ago when a small power company entered an uncertain market dominated by larger firms. Unlocking the true potential of digital power has required an approach very different to what had traditionally existed in the power supply industry. This company’s vision [...]

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 [...]

Power Supply in Inductor

Posted on 06 February 2015

      Inductor and packaging to optimize the POL Point of load regulators (POL) are very widely used in distributed power systems to deliver the final voltage required by the load, particularly for high performance ICs and ASICs. In most cases, these POLs utilize the Buck Converter switching topology to achieve high density and [...]

Applying Power Circulation Theory to More Accurately Measure Power Loss and Efficiency

Posted on 26 January 2015

      The race is on to push efficiency in power conversion beyond 99%. It is a contest with innovative new topologies running neck-on-neck with standard half-bridge solutions featuring SiC and GaN semiconductors. A wide range of applications requires bidirectional power conversion, and it has to be ultra efficient for everything from solar inverters [...]