Military, Aerospace & Hi-Rel

September 2016

Advanced IGBT tech is critical for next-gen energy systems

Anjum Jabeen, Taku Takaku, and Yasuyuki Kobayashi, Fuji Electric

Energy conservation and reduction in CO2-emissions are key factors in mitigating global warming and preserving our future environment. These positive trends are leading to wider usage of power semiconductors in energy conversion systems supplying the rapidly growing global energy demand. IGBT (Insulated Gate Bi

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Date:

09/29/2016

Wolfspeed claims highest-power L-Band radar GaN HEMT

900W CGHV14800 GaN HEMT

Wolfspeed claims highest-power L-Band radar GaN HEMT

Wolfspeed, a Cree company and a leading supplier of GaN-on-SiC high electron mobility transistors (HEMTs) and monolithic microwave integrated circuits (MMICs) with best-in-class reliability, will release the highest power 50V GaN HEMT demonstrated to date — its 900W CGHV14800 GaN HEMT for L-Band radar applications �

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Date:

09/20/2016

50A to 300A, Scalable µModule Regulator Needs 60% Less Capacitance to Power Sub-28nm GPUs, FPGAs, ASICs & Processors

µModule® Regulator with Precision DC & Transient Voltage Accuracy for Advanced Digital Devices

50A to 300A, Scalable µModule Regulator Needs 60% Less Capacitance to Power Sub-28nm GPUs, FPGAs, ASICs & Processors

Linear Technology Corporation introduces the LTM4650-1A and LTM4650-1B, dual 25A or single 50A µModule® (power module) regulators scalable to deliver 300A to high power, low voltage sub-28nm GPUs, FPGAs, ASICs and microprocessors. The low core voltage of these digital devices requires very accurate voltage regu

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Date:

09/08/2016

Driving flyback supplies

Stefan Preimel, Infineon Technologies

Smaller, smarter, and more powerful are market trends for low-power switched-mode power supply (SMPS) applications. Smaller requires the SMPS to have a more compact form factor – and, thus higher power density. Smarter requires intelligent system-to-system/system-to-human communication to ensure the systems are

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Date:

09/05/2016

Designing efficient industrial systems

Nazzareno (Reno) Rossetti, Ramesh Giri, and Viral Vaidya, Maxim Integrated

Industrial automation systems are undergoing a revolution to reduce latency and down time. This directly translates to increased profits for factory operators and machine builders. Dubbed Industry 4.0, this effort will add more intelligence across the factory floor from HMI panels and controllers to communication mo

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Date:

09/05/2016

A look at Virginia Tech’s Little Box Challenge design

Xiaonan Zhao, Lanhua Zhang and Rachael Born, Virginia Tech

In response to Google’s Little Box Challenge (LBC), our Virginia Tech team, the Future Energy Electronics Center (FEEC), decided to design a power inverter. As shown below, our design significantly surpassed the LBC specifications. Our final design exhibited a power density of 61.2 W/in3, exceeding the LBC goa

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Date:

09/05/2016

Delivering digital in small spaces

Tony Armstrong, Linear Technology

It should come as no surprise to anyone that a the continuing adoption of Digital Power System Management (DPSM) within the communications and computer industries continues to be driven, in large part, to the high current levels demanded by the sub-20nm ASICs and/or FPGAs that are at the core of their sys

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Date:

09/05/2016

Inductor investigation

Ray Ridley, Ridley Engineering

Here we’ll show how Spice can be used to provide proximity loss results for magnetics windings. Proximity loss equations are solved for a set of frequencies, and a simulation circuit is generated which predicts the proper AC losses regardless of the current waveform. Inductor winding AC resistance calcul

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Date:

09/05/2016

Mouser and Grant Imahara release video on first-of-its-kind I.S.S. Design Challenge

I.S.S. Design Challenge

Mouser and Grant Imahara release video on first-of-its-kind I.S.S. Design Challenge

Mouser Electronics, a leading distributor of electronic components, released a new video for the International Space Station (I.S.S.) Design Challenge, part of Mouser’s award-winning Empowering Innovation Together program. In this new video, celebrity engineer Grant Imahara describes the first-of-its-kind gl

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Date:

09/03/2016

Current-mode control history part V

Ray Ridley, Ridley Engineering

In the last part of this series, we saw that only one of the modulator gains found in the literature can be confirmed with measurements. Furthermore, it is shown that the discrepancies in all the models are easily resolved by proper sampling of the system. Different current-mode modulator models In the

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Date:

09/03/2016

Testing the emerging Smart Grid

Ken Christensen, Keysight Technologies

The implementation of the “Smart Grid” is accelerating rapidly. Once just a vision in eyes of power engineers and utilities, the Smart Grid is swiftly taking shape. A major driver in realizing a truly smart electrical grid is the adoption of distributed energy resources (DERs). Grid-connected di

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Date:

09/03/2016

Testing switching power supplies

Wolfgang Bartels, Rigol Technologies Europe

This software, in combination with Rigol oscilloscopes (series DS/MSO2000A, DS/MSO4000 or DS6000) allows customers to set up small test systems, which represent a reasonably priced alternative for measuring switching power supply parameters during the development phase. Switching power supplies are commonly us

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Date:

09/03/2016

Evaluating GaN-based power amplifiers

Walt DeMore, Analog Devices

In the last few years GaN based devices, both discrete FET’s and MMIC’s, have been released and widely used in high power microwave amplifier systems. These devices, available from several foundry sources, are typically fabricated on 100mm SiC wafers. GaN on Si processes are also under consideration, ho

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Date:

09/03/2016

The importance of thermal design

Mike Farrer, Technical Director, Stadium Group

Thermal behavior is important to determining the lifetime performance of electronic system design and the power supply is a critical element in determining that behavior. Heat has a number of effects on a system. The most problematic at a system level is one of long-term reliability. High operating temperatures te

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Date:

09/03/2016

Measuring Tiny Resistances Accurately

Phil Ebbert, Riedon

Measuring the resistance of something is a great deal more complicated if that resistance is very small. With bigger resistances, measurements can be as simple as connecting two leads between a digital multi-meter (DMM) and the device under test (DUT) and reading the number. With small resistances, the multitude of

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Date:

09/03/2016

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