Also this year we organized an Open-Lab in the afternoon prior the Symposium, where participants could use our measurement equipment live and even bring their own designs to be tested. You can download the flyer with all important information.
6th Power Analysis & Design Symposium 2017
The 6th Power Analysis & Design Symposium took place on April 26th, 2017 in Eching near Munich (Germany).
Solving model predictive control challenges in spread spectrum modulated systems
Chaotic spread spectrum modulation in digitally controlled power supplies is very common and widely accepted as the most efficient technique to reduce electromagnetic interference and emissions.
However, this permanently active, unpredictable behavior of this modulation technique might impact other control methods where accurate predictions are vital. This presentation introduces a control system which utilizes sub-cycle model predictive control to achieve true diode emulated sync rectifier control. This is done without analog circuit support within a chaotically modulated PWM scheme in a multiphase architecture. Both techniques, spread spectrum modulation and diode emulation of synchronous rectifiers, are introduced and then incorporated into the multi-loop real-time control concept preventing disruptions between the three control domains.
Analog PFC Design: Step-by-Step
In this technical presentation the operation of the highly popular Continuous Conduction Mode Boost PFC is discussed. Starting from first principles the operation and design of the voltage loop, the current loop and the voltage feed forward filter are detailed. All design equations are presented along with a real life numerical design example. The session concludes with a live demonstration of a fully functioning PFC design.
All attendees will receive a complimentary license for Biricha Digital’s Analog and Digital Power Factor Loop Design Software (www.biricha.com/pld)
Architecture of digital PWM controllers for high current-slew-rate applications
Increased computation capabilities and improved ADC and DPWM IPs make microcontroller based digital PWM controllers a viable solution for many applications. Nevertheless in high current-slew-rate applications increased controller performance is required to provide tight regulation of the output voltage. Thus, dedicated digital PWM controllers, where analog and digital HW is optimized to execute specific control tasks, are the preferred choice.
In this presentation the architectural differences between a microcontroller based solution and a high performance digital PWM controller is explained. Further on a digital control method to achieve fast transient performance without sacrificing quiet and noise insensitive steady state operation will be presented.
Floating measurements with isolated channel oscilloscopes or differentials probes - pros & cons
Isolated channel oscilloscopes offer a safe and an economic way to measure floating voltages in switched mode power supplies. In the presence of fast common mode signal transitions the common mode rejection ratio becomes the critical parameter of the measurement system. In this case differential probes tend to be the best performing measurement concept. This presentation shows the performance differences between isolated input oscilloscopes and differential probes and gives hints on how to get the best out of your measurement.
Insight C - beyond the catalog
On catalog and internet pages MLCC and Polymer capacitors are described under standard test conditions in accordance to EIA-198-2. This means, typically at room temperature, 1 kHz frequency, 1 Vrms sinusoidal voltage and no DC-bias.
However, in real-life applications capacitors are operated at higher frequencies, with DC voltage applied and in a wide temperature range from subzero °C to over 100 °C. In this presentation a simulation tool is introduced that allows to predict the capacitor's behavior under various operating conditions. The simulation covers certain rarely documented cases such as ripple current, pulse capability, reliability, lifetime and anti-resonance effects.
Input impedance measurements for filter stability evaluation
Input filters for DC/DC converters are often required to meet today's EMC requirements. Generally input filters are designed to have low loss which can result in high-Q circuits that are subject to oscillation. This can have a negative impact on the stability of DC/DC converters. Further on, the input impedance of a DC/DC converter is the critical parameter for a proper filter design. This presentation focuses on the theory of the filter stability and how to avoid problems. Different input impedance measurement methods as well as their advantages and disadvantages are presented and compared based on real-life measurement results.
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- 03/05/2020 9th Power Analysis & Design Symposium 2020
- 04/04/2019 8th Power Analysis & Design Symposium 2019
- 04/26/2018 7th Power Analysis & Design Symposium 2018
- 04/21/2016 5th Power Analysis & Design Symposium 2016
- 05/06/2015 4th Power Analysis & Design Symposium 2015
- 05/15/2014 3rd Power Analysis & Design Symposium 2014
- 05/22/2013 2nd Power Analysis & Design Symposium 2013
- 05/03/2011 1st Power Analysis & Design Symposium 2011