products

• Switch Mode Transformers
• 50Hz/60Hz/500Hz Transformers
• Isolation Transformers
• RF Inductors
• Power Inductors
• Common Mode Chokes
• Current Sense Transformers
• Base Drive Transformers
• Noise Cut Transformers

downloads

• Product Catalog (pdf)
• Compliance Statement (pdf)
• ITAR Certification (pdf)
• ISO Certification (pdf)

important info

• New Inductor Technology
• Technical Links
• News and Press
• RoHS Compliance
• Custom Designs
• Seminars

Articles and Resources

In the coming weeks this area will be filling with more content. Please check back soon.

Design/Application Notes

• Switch Mode Transformer Application Notes
• Transformer Design Data Downloads
• Design Your Inductors for More Efficient Applications -- published in the March 2010 issue of Electronic Design Magazine
• Low AC Resistance Foil Inductor note
• Flyback transformer application note

Articles

• Designing High Power, High Frequency Magnetics - by Weyman Lundquist in
  
• Electronic Design, Sept. 27, 2011
  Valuable information for those wanting to work with the newest & latest design innovations.
• Minimize Winding Losses in High-Frequency Inductors- by Weyman Lundquist in Power Electronics Technology, Jul 2008
  A foil-winding technology, which reduces losses of inductors at high ripple currents and high power levels, and a freeware program, which optimizes designs using Litz wire, offer new tools for reducing winding losses at high frequencies.

Presentations

• Foil Windings in Power Inductors: Methods of Reducing AC Resistance -- given at the Applied Power Electronics Conference in February 2010
• 2007 Magnetics Conference Presentation
• 2008 Magnetics Conference Presentation
• 2009 Magnetics Conference Presentation

IEEE Journal Publications

Predicting Inductance Roll Off with DC Excitations

• The ability to predict how the inductance of an inductor will change with applied dc current is investigated for several different magnetic core materials.

2D Models for Simulations and Gap Reluctance Formulas

• An Improved Two-Dimensional Numerical Modeling Method for E-Core Transformers

Core Loss in Ferrites with Arbitrary Flux Waveforms

• Accurate Prediction of Ferrite Core Loss with Nonsinusoidal Waveforms Using Only Steinmetz Parameters
• Improved Calculation of Core Loss With Nonsinusoidal Waveforms

High Frequency Winding Loss Analysis

• A 2D Equivalent Complex Permeability Model for Round-Wire Windings
• An Equivalent Complex Permeability Model for Litz-Wire Windings
• An Improved Calculation of Proximity-Effect Loss in HF Windings of Round Conductors
• Simplified High-Accuracy Calculation of Eddy-Current Losses in Round-Wire Windings
• Winding Loss Calculation with Multiple Waveforms, Arbitrary Waveforms and 2D Field Geometry

Inductor Design for Low AC Resistance

• AC Resistance of Planar Power Inductors and the Quasidistributed Gap Technique
• Analysis of Minimum Cost in Shape-Optimized Litz-Wire Inductor Windings
• Analytical Method for Generalization of Numerically Optimized Inductor Winding Shapes
• Optimal Core Dimensional Ratios for Minimizing Winding Loss in HF Gapped-Inductor Windings
• Optimization of Shapes for Round Wire, High Frequency Gapped Inductor Windings

Litz-Wire

• Computationally Efficient Winding Loss Calculation with Multiple Windings, Arbitrary Waveforms and 2 or 3D Field Geometry
• Cost-Constrained Selection of Strand Wire and Number in a Litz-Wire Transformer Winding
• Easy-To-Use CAD Tools for Litz-Wire Winding Optimization
• Optimal Choice for Number of Strands in a Litz-Wire Transformer Winding
• Optimization of a Flyback Transformer Winding Considering 2D Field Effects, Cost and Loss
• Stranded Wire With Uninsulated Strands as a Low-Cost Alternative to Litz Wire

Barrel-Wond Foil Windings

• The Design of Barrel-Wound Foil Windings with Multiple Layers Interchanged to Balance Layer Currents