Take the chance to join us for a great day packed with lectures, practical examples and demonstrations by international power supply experts. On the evening prior the symposium you are invited to join our "Open Lab" after work measuring event.
Open Lab: Wednesday, April 25th, 15:00 - 19:00
Symposium: Thursday, April 26th, 08:30 - 17:00
85386 Eching (near Munich)
The participation in our symposium is free of charge and includes lunch and refreshments during the breaks.
However, the seats are limited, so you better register sooner than later.
We are looking forward to welcome you at the 7th Power Analysis & Design Symposium!
Registration closes on April 11th, 2018.
Practical EMI Filter Design to Pass Your EMC Test
by Dr. Ali Shirsavar - Biricha Digital
There are many factors that must be taken into consideration when designing input filters. Many of these factors are based on size, cost and manufacturing process and therefore are beyond the control of the design engineer. Furthermore, there is so much uncertainty involved in the design that exact, mathematically elegant, academic equations seldom resemble what happens in real life. This has led some calling this field “black magic”; it is not!
In this highly technical session, Dr. Ali Shirsavar from Biricha Digital presents a very pragmatic and simple methodology for designing EMI input filters to meet your specifications. A complete numerical design example, with full equations and calculations, down to component will be represented. Finally, experimental results will be provided in order to verify the theory.
Solving Control Challenges in Tightly Coupled, Cascaded Multistage GaN Converters
by Andreas Reiter - Microchip Technology
Data centers are one of the biggest consumers of electrical energy today and also one of the fastest growing sectors. The implied challenges this industry is facing ranges from the impact on global warming, the challenges of building new power plants and infrastructure down to basic, economic aspects of how to run server farms competitively. The biggest information supplies like Google or Facebook are therefore working very closely with system vendors like HP, EMC/Dell and component vendors like Intel to push the envelope in solving the trade-off between energy efficiency and performance. The latest push for system optimization is to increase the internal server bus voltage from 12 V to 48 V to save losses between AC/DC or high voltage DC/DC front-end converters and the CPU blade and volume units. One of the greatest technical challenges to solve, are the CPU voltage regulator modules (VRM) directly converting 48 V down to 1 V while still being able to meet the quite tough transient response requirements. Although these requirements are extreme and may only affect a small range of applications today, partial aspects are also relevant for many other applications like automotive 48 V rail applications, telecommunication or lighting systems.
In this presentation, a non-isolated low-cost converter architecture is introduced where an intelligent, digital control approach is used to operate two tightly coupled, GaN-based buck converter stages meeting the major design targets of achieving highest efficiencies and a wide dynamic range, at the same time.
A quick EMI pre-compliance test solution for PCBs helps to get to market faster.
by Axel Hahn - dataTec AG
The use of RF and Microwave Measurement utilities has a necessary impact on today's developers. The evaluation of hardware designs in their function and signal integrity is well supported by measurement tools like Oscilloscopes, Spectrum Analyzers and Network Analyzers. Meanwhile the measuring of unwanted parasitics like EMI is an emerging focus for development engineers. The knowledge of conducted or radiated emissions provides necessary information for improvements in design and hardware components. Modern test solutions can give support in getting to market faster by evaluating new products beside development, production and quality control. An EMI scanner-board with magnetic near-field probes provides a solution which is easy to use, delivers reproducible measurement results and gives the information where the unwanted distortion is located.
Do you really know your EMC ferrites?
by Markus Holzbrecher - Würth Elektronik
This presentation provides an overview on different ferrite types, their different materials and application areas. The influence of temperature and DC bias currents on the impedance in the high frequency range is shown. Finally different filter circuits and their properties are presented in detail.
PWM controller with integrated feedback loop isolators.
by Bernhard Strzalkowski - Analog Devices
A fully integrated PWM current mode fixed frequency active-clamp synchronous forward controller has been designed for isolated DC/DC power supplies. Bi-directional and high bandwidth digital couplers are integrated to eliminate the bulky signal transformers and opto-couplers. With the integrated isolators and gate-drivers on both, the primary and the secondary side, the controller offers a compact system level design and yields a higher efficiency than a non-synchronous forward converter. Output regulation is achieved by sensing the output voltage on the secondary side, where the feedback and the PWM signals are transmitted between the primary and secondary through integrated micro-transformers. By encoding the feedback signal and multiplexing with output over-voltage protection (OVP), over temperature protection (OTP) a high level of system protection has been achieved. To gain the power efficiency, programmable gate delay, dead time and light-load mode are implemented. Test results show very good power efficiency and a high bandwidth feedback loop.
Linear Power Amplifiers for Test Applications
by Helmut Rohrer - Rohrer GmbH
The lab-testing of electronic circuits has become more and more important. In the automotive industry, testing standards such as LV124 and LV148 have been established to ensure proper operation of the electronic components during all expected supply voltage variations. Linear power amplifiers help to solve test challenges by offering an outstanding wide frequency range from DC up to MHz. The linear regulation provides advantages over switched amplifiers such as a precise zero crossing and very low signal distortions.
This presentation provides an overview on the advantages and characteristics of linear power amplifiers. The use of linear amplifiers in applications such as laboratory, component tests, calibration, renewable energy and drive technology is explained. This presentation helps engineers to understand the different types of linear amplifiers and provides knowledge on how to choose the correct amplifier for test applications.
Output Impedance is an Important Design Parameter of a Power Supply
by Florian Hämmerle - OMICRON Lab
Any regulated voltage supply, no matter if linear or switched, has the goal to provide a stable voltage to the load. This is only possible if the output impedance of the supply is sufficiently low. Due to bandwidth limits in the regulation this cannot be ensured for any frequency. To overcome this, capacitors are used to support the power supply in the higher frequency areas. The presence of high-Q capacitors such as MLCCs in combination with parasitic trace inductance or ferrite beads can lead to multiple resonance frequencies. These resonances can dramatically reduce the performance of the load and raise the risk of potential stability problems.
In this presentation the risks of supply resonances and their impact on the load are demonstrated, based on real-live measurement examples and theory. Different output impedance measurement setups and their applications are presented in detail.
Join our Open Lab after your daily work is done. We will have several measurement benches ready for you, where we can measure loop stability, PSRR, output impedance and more...
So come whenever you want, have a beer, bring your power supplies and do some great measurements with us.
The Lab will be open on April 25th from 15:00 - 19:00.
Travel & Hotel information
The journey time from the airport is approx. 20 minutes by car and approx. 15 minutes by S-Bahn.
From the central railway station, the journey time by S-Bahn is approx. 30 minutes. The S-Bahn station "Eching" is within walking distance from the Bürgerhaus Eching.
If you travel by car, you can find a parking garage approx. 100 meters away from the Seminar venue.
You can find a route map here or in the download area.
Accommodation proposals (within walking distance):
Hotel Angermeier Eching
If you are interested in the topics of the past symposiums, check out this link!