In each issue of How2Power Today, experts from industry and academia present the latest design techniques and solutions for power conversion in a wide range of applications. In this section, we provide some background on these authors.
Dr. Sunil Akre
Sunil Akre, a senior member of the technical staff, joined Maxim Integrated Products in 2006. Prior to joining Maxim he Worked for C&D Technologies and Martek Power Abbott, both in the U.S., as well as for Alpha Technologies in Canada, Artesyn Technologies in Ireland, Siemens A.G. in Germany, Advanced Microcomputers in Singapore, and Aditya Power Systems in India. In 2003 he earned a Ph.D. in Power Electronics from the University College in Cork, Ireland and in 1986, an undergraduate Degree in Electronics & Telecommunications from Govt. College of Engineering in Pune, India.
Articles written by Dr. Sunil Akre in How2Power Today:
Small-signal Analysis, Modeling and Design of a Synchronous Buck-Converter in Voltage-Mode Control
Don Alfano
Don Alfano serves as director of power products at Silicon Laboratories. Prior to Silicon Laboratories, Don was co-founder and vice president of marketing for Cygnal Integrated Products, which was acquired by Silicon Laboratories in 2003. Prior to founding Cygnal, he worked for TelCom Semiconductor, an analog and mixed-signal IC supplier, where he served as director of marketing and director of applications. Previously, Don served as vice president of marketing for NVE, Eastern area manager for Dallas Semiconductor and field applications engineer for Mostek. He has also held design engineering positions for analog and digital control equipment and telecommunication systems. Don holds a master’s degree in electrical engineering from Villanova University.
Articles written by Don Alfano in How2Power Today:
Digital Isolators: A Space-Saving Alternative to Gate-Drive Transformers in DC-DC Converters
C. Appere
Cédric Appere joined STMicroelectronics in Tours, France in 2000 and currently serves as a telecom application engineer. Cédric is a graduate of Ecole Centrale d'Electronique.
Integrated Protection and Careful Layout Protect PoE Systems from EOS and ESD
Christophe Basso
Christophe Basso is an Application Engineering Director at ON Semiconductor in Toulouse, France. He has originated numerous integrated circuits among which the NCP120X series has set new standards for low standby power converters. SPICE simulation is also one of his favorite subjects and he authored a second book, “Switch-Mode Power Supplies: SPICE Simulations and Practical Designs”, published by McGraw-Hill in 2008. His work was positively reviewed in several magazines and in a recent PELS newsletter. Christophe holds a BSEE-equivalent from the Montpellier University, France and a MSEE from the Institut National Polytechnique de Toulouse, France. He holds 7 patents on power conversion and often publishes papers in conferences and trade magazines.
Articles written by Christophe Basso in How2Power Today:
Ali M. Bazzi received the B.E. degree in electrical engineering in June 2006 (with high distinction), and the M.E. degree in electrical engineering in July 2007 from the American University of Beirut, Lebanon. Since August 2007, he has been pursuing the Ph.D. in electrical engineering at the University of Illinois at Urbana-Champaign.His research interests are power electronics applications in motor drives and renewable energy, mainly in the fields of control and optimization. He was the conference director of the 2010 Power and Energy Conference at Illinois, and is currently the chair of the IEEE PELS/PES joint Student Chapter at the University of Illinois at Urbana-Champaign. He is a student member of the IEEE, and a member of the IEEE Power Electronics Society, and IEEE Industry Applications Society, and IEEE Power and Energy Society.
Articles written by Ali M. Bazzi in How2Power Today:
Comprehensive Flux Estimator Implementation Procedures For Advanced Control Of Inverter-Fed Induction Machines
Bob Bell
Robert (Bob) Bell is the applications engineering manager for the National Semiconductor design center in Phoenix, Ariz. Products designed at the Phoenix design center include integrated switching regulators, next-generation PWM power controllers, gate drivers, and hot-swap and load-share controllers. He has been with National Semiconductor since September 2001. Prior to joining National, Bob designed power converters for military and space applications. Bob holds a Bachelor of Science degree in Electronic Engineering from Fairleigh Dickinson University. To date he has published 25 power design articles, 8 conference papers and 3 patents.
Frequency Dithering: A Tool for Overcoming Last-Minute EMC Hurdles
Dakshina Murthy Bellur
Dakshina Murthy Bellur received his BE degree in electrical engineering from Visveswaraiah Technological University, Belgaum, India, and MS from Wright State University, Dayton, OH in 2003, and 2006, respectively. He is currently pursuing PhD at Wright State University. His areas of interest are PWM dc-dc converters, resonant power converters, high-frequency magnetics, and renewable energy systems.
Articles written by Dakshina Murthy Bellur in How2Power Today:
An Overview and Simulation of DC-DC-AC and Z-Source Grid Connected Inverters
Cyril Borchard
Cyril Borchard is a product marketing engineer responsible for rectifiers in the power segment at STMicroelectronics, France. He was previously in charge of marketing activities for rectifiers, protections, IPAD, thyristors and triacs in the consumer segment. In that scope, Cyril Borchard participated as marketing representative in the development of dedicated rectifiers for flat-panel displays (LCD and PDP) as well as specific protections and IPAD for consumer applications such as HDMI. Cyril Borchard holds a degree in Microelectronics and Automation from the Ecole Polytechnique de Montpellier.
Articles written by Cyril Borchard in How2Power Today:
PFC Efficiency Improvement Using SiC Power Schottky Rectifiers
A. Bremond
André Bremond was with STMicroelectronics in Tours, France from 1987 through 2009 where he served as a telecom application lab manager. André is a graduate of the Conservatoire National des Arts et Métiers.
Articles written by A. Bremond in How2Power Today:
Integrated Protection and Careful Layout Protect PoE Systems from EOS and ESD
Oliver Brennan
Oliver Brennan is a senior IC design engineer with Analog Devices where has worked for 12 years. He currently works on Power Management Products. Previously, Oliver worked on data converters.
Articles written by Oliver Brennan in How2Power Today:
Switching-Regulator Insights: Achieving Longer Battery Life in DSP Systems
Frank Cathell
Frank Cathell has been a senior applications engineer with ON Semiconductor for over 6 years. Frank has worked in the power electronics industry for over 35 years and has obtained several patents for power conversion circuits and has written numerous articles and/or papers on the subject. Frank’s previous employment has included Lambda Electronics, International Power Systems, Maxwell Laboratories, Tectrol Inc. and others in addition to his own past consulting business.
Articles written by Frank Cathell in How2Power Today:
Mark Christini is a lead application engineer for Ansoft and has over 20 years experience in the field of computational electromagnetics. He is a licensed professional engineer, a senior member of IEEE and a former editor for IEEE Transactions on Power Delivery. He has a BSEE from Penn State and a MSEPE from Rensselaer Polytechnic Institute.
Articles written by Mark Christini in How2Power Today:
Majid Dadafshar is currently working for Fairchild Semiconductor as a field application engineer. He has over 25 years of design engineering experience in power electronics, both in commercial and military applications. He received his engineering degree in 1984 from Northern Arizona University majoring in electronics. He has been employed by ITT Power systems, ITT courier, ITT Aerospace/Defense, Sony Electronics, Eastman Kodak, and Pulse Engineering. He holds four patents and has published a number of technical papers in power supply design, magnetics, EMI, loop stability and conducted numerous domestic and international electronic technical meetings in different symposiums.
Articles written by Majid Dadafshar in How2Power Today:
Increasing Active-Mode Efficiency And Reducing Standby Power for Energy Star
Barry Dagan
Barry Dagan, P. E. is chief technology officer of Cool Innovations. Barry has more than 25 years of experience in thermal management design and holds multiple patents in this area.
Articles written by Barry Dagan in How2Power Today:
Flared Pin Fin Heat Sink Keeps LED Light Burning Brightly
Rakesh Dhawan
Rakesh Dhawan is a twenty years veteran of Power Electronics Industry. Rakesh has a BTech in Electrical Engineering from the Indian Institute of Technology, Kharagpur, a Masters’ of Electrical Engineering (MSEE) from the University of Minnesota, and an MBA from Old Dominion University, Virginia. Rakesh has been an entrepreneur who has built several high-quality technology businesses. Rakesh has six approved and filed patents and twenty five conference and journal publications to his credit. Rakesh founded Strategic Technology Group to further his passion in power electronics. His interests include electric bicycles, electric vehicles, permanent magnet brushless motor drives, switch-mode power supplies, solar inverters, simulation, statistics, project management and new and ultra-fast product development. Rakesh has built and managed several high-technology product development teams in his career. He has been directly responsible for over twenty five product launches.
Articles written by Rakesh Dhawan in How2Power Today:
Integrating Statistics and Manufacturing Data into Simulation of Permanent Magnet Motor Drives
Dennis Feucht
Dennis Feucht has been involved in power electronics for 20 years, designing motor-drives and power converters. He has an instrument background from Tektronix, where he designed test and measurement equipment and did research in Tek Labs. He has lately been doing current-loop converter modeling.
Articles written by Dennis Feucht in How2Power Today:
Rediscovering The Integrated-Magnetics Isolated Ćuk Topology
Veda Prakash Galigekere
Veda Prakash Galigekere received the B.E, M.S Degrees from Visveswaraiah Technological University, Belgaum, India and Wright State University, Dayton, Ohio in 2004 and 2007, respectively. He is currently pursuing his PhD at Wright State University. His areas of interests are PWM dc-dc and dc-ac inverters, power semiconductor devices, renewable energy systems and system-level simulations of the same.
Articles written by Veda Prakash Galigekere in How2Power Today:
An Overview and Simulation of DC-DC-AC and Z-Source Grid Connected Inverters
Frederic Gautier
Frederic Gautier is an application engineer at STMicroelectronics, France. He has been an expert in switched-mode power supply applications and the industrial and power segments within the Application & System Engineering department since 1998. Frederic Gautier graduated with a technical degree in electronics and holds several patents in the switched-mode power supply domain within STMicroelectronics.
Articles written by Frederic Gautier in How2Power Today:
PFC Efficiency Improvement Using SiC Power Schottky Rectifiers
Sridhar Gurram
Sridhar Gurram joined Analog Devices in 2006 and currently is a staff applications engineer with the company’s Power Management Products group in San Jose, Calif., focusing on switching regulators for industrial and infrastructure markets. Earlier, he was a product marketing engineer for the dc-dc switching regulator product line. He has 12 years of experience in power-management IC design, applications and marketing. Sridhar has a master’s degree in electrical engineering and is currently working on a master’s degree in business administration
Articles written by Sridhar Gurram in How2Power Today:
Switching-Regulator Insights: Achieving Longer Battery Life in DSP Systems
Chad Hall
Currently serving as chief operating officer of Ioxus, Chad Hall has used his extensive mechanical engineering and business experience to take Ioxus from funding to factory to launch. Chad is responsible for manufacturing and testing of standard products, as well as further establishing the company and building the team, increasing sales, locating funding, and spurring continued product development. Chad is also responsible for educating the market on Ioxus products and training sales personnel on the technical aspects of the expanding product line.
Chad spent 14 years with Ioxus’ parent company, Custom Electronics, Inc. (CEI). In addition, he has been involved in several high-voltage, high-reliability capacitor projects at national labs. Chad attended State University of New York, Delhi and received a 3-M certificate in electro-mechanical design and drafting. Chad is a member of the American Society of Mechanical Engineers (ASME).
Ajay Hari is an Applications Engineer at the National Semiconductor design center in Phoenix, Arizona. He has been with National Semiconductor since 2007. Prior to National, he worked for General Electric designing power converters for lighting applications. He holds a Master’s in Electrical Engineering from the University of Florida. Ajay has published several papers and articles in the area of power electronics and holds one U.S. patent.
Frequency Dithering: A Tool for Overcoming Last-Minute EMC Hurdles
Sanjay Havanur
Sanjay Havanur is currently the principal applications engineer at Alpha & Omega Semiconductor, Inc. Since receiving his Master's Degree in Power Electronics and Drives at the Indian Institute of Technology, Mumbai in 1983, Havanur has gained extensive experience in the field of power electronics, having worked in design and applications in both India and the U.S.
He has published papers and application notes in technical journals, and holds several patents relating to high-frequency power conversion. Sanjay Havanur's current interests include novel and efficient power conversion topologies, energy harvesting techniques and solar power.
Articles written by Sanjay Havanur in How2Power Today:
Timothy Hegarty is a principal applications engineer for the National Semiconductor design center in Tucson, Ariz. He received the B.E.(Elec.) and M.Eng.Sc degrees in Electrical Engineering from University College Cork, Ireland in 1995 and 1997, respectively. Prior to joining National, he worked for Artesyn Technologies designing isolated board-mounted brick converters. His areas of interest are integrated PWM switching regulators and controllers, LDOs, references, hot-swap controllers, renewable energy systems, and system-level simulation of same.
Articles written by Timothy Hegarty in How2Power Today:
SIMPLIS Simulation Tames Analysis of Stability, Transient Response, and Startup For DC-DC Converters
Jun Honda
Jun Honda is a senior staff engineer in International Rectifier’s Energy Savings Product Business Unit in El Segundo, Calif. Jun has more than 15 years of experience in designing consumer, as well as professional audio circuits, including class D audio amplifiers.
Integrated Driver Shrinks Class D Audio Amplifiers
Charles Hymowitz
Charles Hymowitz is a technologist, marketer and business executive with over 25 years of experience in the engineering services and EDA software markets. Mr. Hymowitz has been Chairman and CEO of AEi Systems, LLC since its re-organization in 2002. He currently guides all aspects of the company’s operations including technical services, product quality, sales and a staff of over 30 in-house and consulting engineers.
Articles written by Charles Hymowitz in How2Power Today:
Lost in Space: Unpredictable Aging Can Send Resistor Accuracy Way Off Course
Suresh Kariyadan
Suresh Kariyadan joined International Rectifier in June 2009 as senior staff engineer for POL Applications, Enterprise Power Business Unit (EPBU) where he is responsible for all Point Of Load customer support for the EPBU. The role involves understanding the customer’s power supply requirements, providing reference designs, layout of PCBs, design verification tests, troubleshooting customer application boards and evaluating new product performance in application circuits.
Prior to joining International Rectifier, Suresh held senior engineering positions with Maxim Integrated Products and Cherokee International. He holds a Bachelor Degree in Electronics and Telecommunication from Kerala University, India.
Articles written by Suresh Kariyadan in How2Power Today:
Reverse-Current Phenomenon in Synchronous Rectifiers
Marian K. Kazimierczuk
Marian K. Kazimierczuk received the M.S., Ph.D., and D.Sci. degrees in electronics engineering from the Department of Electronics, Technical University of Warsaw, Warsaw, Poland, in 1971, 1978, and 1984, respectively. He is currently a professor of electrical engineering at Wright State University, Dayton, OH. His areas of research are in high-frequency high-efficiency RF power amplifiers, resonant and PWM dc-dc power converters, high-frequency rectifiers, modeling and control of converters, high-frequency magnetics, power semiconductor devices, electronic ballasts, RF transmitters, sensors, and superconductivity. He is a Fellow of IEEE and has published more than 230 papers
Articles written by Marian K. Kazimierczuk in How2Power Today:
An Overview and Simulation of DC-DC-AC and Z-Source Grid Connected Inverters
Sameer Kelkar
Sameer Kelkar joined Power Integrations in 2002 and is currently a senior applications engineer. He has a Masters degree in Electrical Engineering from the University of Minnesota.
Articles written by Sameer Kelkar in How2Power Today:
Software Speeds Transformer Design For AC-DC Power Supplies
Philip T. Krein
Philip T. Krein received the B.S. degree in electrical engineering and the A.B. degree in economics and business from Lafayette College, Easton, Pennsylvania, and the M.S. and Ph.D. degrees in electrical engineering from the University of Illinois, Urbana. He was an engineer with Tektronix in Beaverton, Oregon, then returned to the University of Illinois. At present he holds the Grainger Endowed Director’s Chair in Electric
Machinery and Electromechanics as director of the Grainger Center for Electric Machinery and Electromechanics. His research interests address all aspects of power electronics, machines, and drives, with emphasis on nonlinear control approaches. He published an undergraduate textbook, Elements of Power Electronics (Oxford University Press, 1998). In 2001, he helped initiate the International Future Energy Challenge, a major student competition involving fuel cell power conversion and energy efficiency for machines. He holds twelve U.S. and four European patents. Dr. Krein is a registered professional engineer in Illinois and in Oregon. He was a senior Fulbright Scholar at the University of Surrey in the United Kingdom in 1997-98, and was recognized as a University Scholar in 1999, the highest research award at the University of Illinois. In 2003 he received the IEEE William E. Newell Award in Power Electronics. From 2005 to 2007 he was a Distinguished Lecturer of the IEEE Power Electronics Society.
Articles written by Philip T. Krein in How2Power Today:
Comprehensive Flux Estimator Implementation Procedures For Advanced Control Of Inverter-Fed Induction Machines
Julie J. Lee
Julie J. Lee holds a BS and MS in electrical engineering from Wright State University. She is currently pursuing her PhD in Electrical Engineering from Wright State University, and working as a research assistant and a graduate teaching assistant in the Department of Electrical Engineering at WSU. Her research interests are in power electronics, PWM dc-dc converters, and power semiconductors. Ms. Lee is a member of Tau Beta Pi and an IEEE student member.
Articles written by Julie J. Lee in How2Power Today:
Effects of Load Changes On The Control-to-Output Transfer Function Of A Buck-Boost Converter In CCM
Greg Lubarsky
Greg Lubarsky is a senior applications engineer with National Semiconductor’s Grass Valley design center and works in the Mobile Devices Power group. He received his Bachelor of Science degree in Electrical Engineering from the University of California, Davis in 2002. Lubarsky has over seven years of experience as an applications engineer working with white LED backlight drivers, LED flash drivers and other power management electronics.
Articles written by Greg Lubarsky in How2Power Today:
Give Your Battery A Rest With A Supercapacitor-based Power Subsystem
Amitabha Mallik
Amitabha Mallik received his Bachelor’s of Engineering from Visveswaraiah Technological University, Belgaum, India in 2008. He is pursuing his MTech at MIT, Manipal University, Manipal, India, in Power Electronics Systems and Control. He is currently working at Strategic Technology Group, Pune, India. His areas of interests are power semiconductor devices, motor drives and control, PWM dc-dc converters, and OrCAD/PSPICE (system-level simulations).
T. K. Man
T. K. Man received the BSc (Hon) degree at Manchester Polytechnic in 1984, MSc degree in engineering at Hong Kong Polytechnic University in 1999 and MSc degree in IC Design Engineering at Hong Kong Science and Technology University in 2007. Man has 22 years experience in power supply design, both linear and switching. He joined National Semiconductor in 2004 as a product application manager in Hong Kong. Prior to National, Man worked at Motorola and ON Semiconductor. His research interests include control modeling of SMPS, LED lighting systems and energy harvest technology. He is a senior member of IEEE.
Colonel W. T. McLyman
A recognized authority in the field of magnetics design with 47 years of experience, Colonel McLyman is an accomplished inventor, author, and lecturer. He holds fourteen U.S. Patents on magnetics-related concepts and has written four popular textbooks including the recently revised and expanded, Third Edition of Transformer and Inductor Design Handbook.
McLyman retired as a senior member of the Avionics Equipment Section of the Jet Propulsion Laboratory (JPL). In his thirty years at JPL in power conversion and as the magnetics specialist, McLyman wrote over seventy JPL Technical Memorandums, New Technology Reports, and Tech-Briefs on the subject of magnetics and circuit designs for power conversion, fifty of which have been published by NASA. McLyman is President of Kg Magnetics, Inc., which specializes in power magnetics design.
Articles written by Colonel W. T. McLyman in How2Power Today:
David G. Morrison, Editor/Publisher of How2Power.com, is a veteran technical writer and editor. Prior to founding How2Power.com, Morrison served as Editor-in-Chief of Power Electronics Technology (PET) magazine. Prior to joining Power Electronics Technology, Morrison served as a Technology Editor at Electronic Design magazine where he reported on analog & power technologies, and as an associate editor at Electronic Products magazine, where he reported on analog ICs and other components.
Before becoming an editor, Morrison worked for several years as an electrical engineer at audio and RF electronics companies. Morrison received a BSEE from the University of Rochester.
Kim Nielson
Kim Nielson is a Sr. Engineering Technician for National Semiconductor's Design Center (Phoenix), where he has worked for five years. The center's products include next-generation PWM power controllers, gate drivers, and hot-swap and load-share controllers. Before joining National Semiconductor, Nielson spent 15 years as a power supply proto-type development specialist for commercial, military, and space applications. In his spare time, he enjoys golf, music, and travel.
Articles written by Kim Nielson in How2Power Today:
Increase Boost Regulator Efficiency With Synchronous Rectification
Michael O'Loughlin
Michael O'Loughlin is an applications engineer with the Power Supply Control Products group at Texas Instruments. He specializes in offline and isolated power supply design and has authored numerous articles on power factor correction and power supply design related topics. Michael received his Bachelor of Science degree from the University of Massachusetts.
Jeff Perry
Jeff Perry is the senior development manager for National Semiconductor's WEBENCH online design environment. He spent the first part of his career in semiconductor process engineering and the latter portion in power supply applications and development. He has been involved with the WEBENCH tool since it's inception in 1999. Jeff graduated from UCLA with a BS in physics and received an MBA from San Jose State University. He holds 10 patents.
Articles written by Jeff Perry in How2Power Today:
Roberto Prieto was born in Madrid, Spain. He received the M.Sc. and Ph.D. degree in electronic engineering from the Technical University of Madrid, Spain, in 1993 and 1998 respectively. Since 1994, he has been an assistant professor at the Technical University of Madrid, where he is currently associate professor and deputy vice-president for research. He has published more than 100 papers in International conferences and journals, most of them from the IEEE. His research interests include high-frequency magnetic components, modeling of power electronics systems and development of CAD tools for power electronics applications.
Articles written by Roberto Prieto in How2Power Today:
Since joining International Rectifier (IR) in 1996, Tom Ribarich has been the director of IR’s Lighting IC Design Center where he is responsible for developing control ICs for the global lighting market, including fluorescent, halogen, HID, LED and LCD backlighting applications. Prior to that, Tom was employed by Knobel Lighting Components in Switzerland where he designed dimmable electronic ballast systems for a variety of applications. Tom holds a BSEE degree from California State University, Northridge and a Master’s degree in ASIC design from University of Rapperswil, Switzerland.
Articles written by Tom Ribarich in How2Power Today:
Steve Sandler has over 30 years of experience in engineering. He is the founder and CTO of AEi Systems, LLC and is responsible for worst-case circuit analysis of power, RF, and linear systems as well as the design of AEi Systems’ line of rad-hard dc-dc converters. Mr. Sandler is president of SM Sandler Holdings, LLC and is a recognized author, educator and entrepreneur in the areas of power, RF and instrumentation
Articles written by Steve Sandler in How2Power Today:
Lost in Space: Unpredictable Aging Can Send Resistor Accuracy Way Off Course
Paul Schimel
Paul Schimel spent his early years developing a wide ranging interest in all this electrical and mechanical, investigating and eventually repairing all types of equipment. He was working conventional machine tools and welding by 14. Through high school, he fixed most anything that was breakable including yard equipment, two-way radio gear, power tools, TVs, and stereos. He attended the School of Electrical Engineering at the University of Illinois at Urbana Champaign, specializing in power electronics where he earned a BSEE degree.
After this, he spent eight years in successful design engineering roles in consumer equipment including power supply design for projection and direct view televisions and telecommunications equipment including ring generators, battery rectifiers/eliminators, dc-dc converters, and UPSs—both switch-mode and ferroresonant. He then moved on to field applications engineering where he has spent the last six years on power management support and design work for Unitrode/TI, Fairchild and International Rectifier. He has assisted successful designs from mW to MVA and from prototype stages to finished end equipment. He moonlights in broadcasting, antique test equipment restoration, metal working, wood working, TIG welding, loudspeaker building, and amateur radio (K5NJP). He holds a commercial radio telephone license, a refrigeration license, and PE license. Mr Schimel holds several patents on magnetic structures for power electronics and novel circuitry.
Johan Strydom
Johan Strydom is currently the head of Applications Engineering at EPC Corporation. He received his Ph.D from the Rand Afrikaans University, South Africa in 2001. From 1999 to 2002 he was working as a GRA and post-doctoral researcher at the Center for Power Electronics (CPES), Virginia Tech. Prior to joining EPC, he held various application engineering positions at International Rectifier Corporation (IRF) and more recently at Linear Technology Corporation (LLTC), working on a wide range of consumer and industrial applications including motor drives, class-D audio, hybrid power modules and dc-dc converters for VRM and POL.
Articles written by Johan Strydom in How2Power Today:
Paul Vrabel has worked at Sandia National Laboratories for 25 years. Most of those years were designing test circuits, fixtures and testers for various components throughout the Labs. During the past seven years, he has
worked in the Magnetics Department designing, developing, and qualifying function, in-process and design testers. Paul is a member of the Product Realization Team (PRT). Sandia is a multi-program laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy’s National Nuclear Security Administration under contract DE-AC04-94AL85000.
Articles written by Paul Vrabel in How2Power Today:
Testing Military Grade Magnetics: Transformers, Inductors and Coils
Tim Wilkerson
Tim Wilkerson joined Analog Devices in 2001 as a senior field applications engineer located in San Jose, Calif. Prior to that Tim was with STMicroelectronics and Waferscale Integration in central applications. Previous work includes 20 years in design and development for several companies in the Midwest, most recently at Basler Electric working on protective relays for power systems. Tim received a BSEE from Purdue in 1976 and an MSE with Electrical option in 1997 from Southern Illinois University.
Articles written by Tim Wilkerson in How2Power Today:
Switching-Regulator Insights: Achieving Longer Battery Life in DSP Systems
L.K. Wong
L. K. Wong received his Ph.D. degree at the Hong Kong Polytechnic University in 1999. Wong joined National Semiconductor as a senior product application engineer in 2006, working in the area of power electronics including modeling, control, and dc-dc power converter design. Currently, he is focusing on high-efficiency, high-performance LED driver design for general illumination and backlight applications. He is a member of the IEEE.
