Category | Application and Design

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 [...]

More Light with Less Power

Posted on 07 January 2015

      Report from LpS 2014 The LED professional Symposium + Expo 2014 (LpS 2014) took place from September 30th to October 2nd in Bregenz, Austria. 58 multidisciplinary expert talks, 5 hands on workshops and 2 tech-panels were hosted to inform the visitors about all aspects of LED lighting. Close to 100 companies were [...]

Automated Acoustic Inspection for IGBT Modules

Posted on 05 January 2015

      High-power IGBT modules have long needed a non-destructive method to inspect for internal structural defects such as voids, non-bonds, delaminations and cracks. The best time for such inspection is after assembly but before encapsulation, which prevents rework. X-ray won’t find all of these defects, but the ultrasound of acoustic micro imaging systems [...]

Active Vibration Control in Ultrasonic Wire Bonding

Posted on 17 December 2014

      Improving Bondability on Demanding Surfaces Ultrasonic wire bonding is an established technology for connecting the electrodes of microelectronic devices as well as power electronic modules. Bonding on demanding surfaces like connector pins embedded in plastic frames can challenging. A new approach for surpressing unwanted vertical vibrations by an active vibration control can [...]

Tiny Power Components for Wireless Charging, Step Down Conversion and “Always On” Devices

Posted on 15 December 2014

      Texas Instruments used electronica 2014 in Munich to showcase its broad portfolio of new products corresponding to the slogan coming from the Jack Kilby Day “TI technology is fundamentally changing the way we live our lifes – from wireless charging to autonomous vehicles, from smart cities and factories of the future to [...]

LLC Resonant Converter Simulation Using PLECS

Posted on 03 December 2014

      Soft-switching capabilities of resonant converters allow for power supplies with smaller packaging and higher power density. PLECS is a simulation tool developed for power electronics engineers that offers very efficient and robust modeling of power supplies with multi-physical domains and associated controls. In this study, a full-bridge LLC converter with variable-frequency operation [...]

The Power Supply Industry – What’s Happening?

Posted on 28 November 2014

      The power supply industry is in the middle of a period of change. New opportunities are growing quickly whilst established markets falter. Because of this, the global market for AC-DC and DC-DC power supplies is set for healthy expansion from this year until at least 2017; revenue during these three years is [...]

The Nichols Chart - the Practical Tool for Design and Test

Posted on 26 November 2014

      Stability of feedback amplifiers and control systems like SMPS are targeted Comprehensive articles and books about feedback loop design and test abound, Bode Plots and Nyquist Diagrams, both highly impractical, are discussed at great length and recommended, while the superior Nichols Chart is hardly ever mentioned. By Dr.- Ing. Artur Seibt The [...]

Protection Components for LED Lighting Systems

Posted on 19 November 2014

      All-round ESD and heat protection LED lighting systems require high-performance ESD and overtemperature protection if they are to live up to their potential in terms of lifetime, low maintenance costs and overall reliability. EPCOS protection components provide effective and cost-efficient protection for the LED arrays, their power supplies and control circuits. By [...]

Optimising the Quasi Resonant Flyback Transformer

Posted on 14 November 2014

      Most of the Isolated Offline Power Supplies less than 100W are flybacks. These converters have many advantages over other topologies. It is the least expensive isolated topology because it uses the fewest number of components. The transformer behaves as a coupled inductor, which stores the energy in the gap. This eliminates the [...]