Online Seminars

Signal Path | Video | Power

Overview

The Video and Power Application Seminars examine technical challenges faced by design engineers. The Video Application seminars provide a detailed look into the video portion of the signal path. The seminars cover topics such as: anti-aliasing and reconstruction video filtering, the advantages of using an integrated video filter driver, and video switching and routing.

Seminar	Presenter	Year
Signal Path
• An innovative serialization/deserialization solution for driving small displays, up to 5 inches in diameter, enabling lower EMI, board space, power and cost. - Fairchild's µSerDes™	Jon Whalen and Andrew Pederson	2005
Video
• Integrated vs. Discrete Video Filtering	Allen Watkins	2005
• Routing and Isolating Video and USB signals	Travis Williams and Graham Connolly	2005
• Why Filter in Video Applications?	Bryan Cox	2005
• Video Filter & Switch Matrix Demonstration (in DVD)	Allen Watkins	2005
Power Seminar
• Application Review and Comparative Evaluation of Low-Side MOSFET Drivers Power MOSFETs require a gate drive circuit to translate the on/off signals from an analog or digital controller into the power signals necessary to control the MOSFET. This topic provides details of MOSFET switching action in applications with clamped inductive load, when used as a synchronous rectifier, and driving pulse/gate drive transformers. Potential driver solutions including discrete and integrated driver designs are discussed. MOSFET driver datasheet current ratings are examined and circuits are presented to assist users in evaluating the performance of drivers on the lab bench.	Van Niemela	2007
• Low Cost, Isolated Current Source for LED Strings Learn "how to" design an isolated constant current source to drive high power LED’s from an AC power line. The constant current source is built using a flyback topology and has an efficiency greater than 80%. Conventional current sources need many components for this. This application is a low-cost solution based on an innovative circuit (patent filed) using a Fairchild Power Switch (FPS). The converter is a primary side regulated removing the need for an optocoupler and other additional components.	Carl Walding	2007
• Understanding Diode Reverse Recovery and Its Effect on Switching Losses Half-bridge structures are extensively used in power electronics applications: lighting, power supplies, UPS and motor drives. When these half-bridge circuits are hard switched, the low side diode reverse recovery affects system performance. This topic reviews the principle of diode reverse recovery and how this affects the semiconductor switch performance. Practical tests showing how di/dt and temperature affect performance are presented. Finally measurements using different devices are compared showing the curves for fast and soft recovery diodes, showing that in some cases, efficiency can be improved by adding capacitance in parallel with the diode.	Alex Craig	2007
• Tips and Tricks to get More out of your SPICE Simulations Circuit simulation tools are useful supplements to breadboarding for gaining fast and detailed design insight. A collection of simulation tips and tricks used by Fairchild’s Global Power Resource support group is presented. Interactive on-line design simulation tools and device models for off-line solutions are available on the Fairchild website.	Ron Vinsant	2007
• Design Review: Power Stage Design for a 200W Off-Line Power Supply New AC power supply designs in the range of 200W - 500W increasingly require power factor correction (PFC) which reduces the energy wasted in the power utility supply lines and increases the maximum power which can be drawn from a power outlet. This paper describes the design of a two switch forward power supply with a continuous PFC front end based on the FAN4800. Design options for such a power supply are reviewed. Practical topics including layout, EMI, magnetic design are discussed with the aim of helping practicing engineers to accelerate and improve their designs.	Ron Vinsant	2007
• Design Consideration of LLC Resonant Converter Recently the, LLC resonant converter has drawn a lot of attention due to its advantages over the conventional series resonant converter and parallel resonant converter; narrow frequency variation over wide load and input variation and Zero Voltage Switching (ZVS) of the switches for entire load range. This topic will discuss the analysis and practical design considerations of a LLC-type resonant converter. Included in this discussion will be the design of a transformer and the selection of components, a step-by-step design procedure, and a design example that will help engineers design the LLC resonant converter easily.	Laszlo Balogh	2007
• Understanding Modern Power MOSFETs Driven by new energy efficiency regulations, system designers are increasingly adopting synchronous buck controllers and half-bridge structures. This presents them with the new challenge of designing with power MOSFETs. This presentation provides a basic understanding of MOSFETs with more detailed explanation of synchronous buck and half-bridge structures.	John Harper	2006
• Applying Power MOSFETs in an Unclamped Inductive Switching Environment What is Unclamped Inductive Switching and why is it important to the designer? Terminology and definitions Understanding the UIS failure mechanism within a power MOSFET Determining the UIS capability of a power MOSFET Understanding and interpreting the Fairchild single pulse UIS data sheet graph Design Example #1 -- Choosing the correct power MOSFET for a single pulse UIS condition Design Example #2 -- Choosing the correct power MOSFET for a repetitive pulse UIS condition Conclusions	Alex Craig	2006
• A Fresh Approach to Switching Regulator Topologies and Implementations There are several alternatives to the widely used hard switched flyback topology which still has its place in many applications. This presentation identifies areas where new approaches provide performance and total system cost advantages.	David Fry	2006
• Practical Power Application Issues for High Power Systems Choosing the right products for high power systems is a critical challenge. This presentation will introduce new products for the system design of a power supply and frequency inverters that offer better reliability, higher efficiency and a reduction of board space.	Paul Schimel	2006
• Practical Power Application Issues for Switch-Mode Power Supplies EMI Reduction Techniques for Power Supplies: layout, input filter resonance, measuring common mode and differential mode noise separately, comparison of SEPIC and buck converters Stability of synchronous buck converters: how to design the compensation network What non-magnetics designers need to know about transformers: understanding transformer and core datasheets, what it takes to design a transformer yourself, how to specify a transformer so that you get what you want	Van Niemela	2006