 Hello, welcome to this video. This video is an introduction to Schottky and FRD E-Tool. Schottky and FRD E-Tool is a software developed by ST Microelectronics to help designers to easily explore electrical characteristics of power Schottky and field effects rectifiers to quickly perform power loss calculation using application waveforms. The reason why this tool was developed comes from a very simple observation. The most basic way to compare products is to compare their datasheets. This is a slow and tedious process. Reading values on datasheet curves can be quite imprecise and it is easy to make mistakes. In addition of that, if you want to estimate power losses, the procedure is even longer. Then the question is, what if we had a tool that could do all these repetitive tasks for us? Here comes Schottky and FRD E-Tool. We have developed it exactly for this reason. The tool is accessible online and once directly in your internet browser. You can access to the software from this link. The main layout of Schottky and FRD E-Tool is quite simple. On the top, you can select the language of the user interface. Today, English and Chinese are proposed. In the info menu, a user manual is available as a PDF file. It contains all the information necessary to use the software. In the center, you can see a collection of diodes. The tool contains almost all power Schottky and field effect rectifiers offered by estimation electronics on the market. On the left, several search and filter functions are available, allowing to find easily a part number. To select a diode, just click on the basket icon. Once a diode is selected, it appears in the selection list at the bottom. From there, it is possible to explore the diode characteristics function of junction temperature. The tool offers two ways to explore diode electrical characteristics. A dynamic table and dynamic electrical characteristics plots. First, let's introduce the dynamic table. Typical forward voltage and typical leakage current values are shown at two temperatures, by default 25 and 125 degree Celsius. Forward voltage are given at two current levels, IF1 and IF2. By default, IF2 corresponds to current rating of the diode. IF1 is half of IF2. Leakage current is given at reverse voltage VR, which is set by default to voltage rating of the diode. All these parameters can be changed in table options and values are updated according to the new parameters. Note that parallel configurations can be analyzed up to six days in parallel. Click on forward chart to launch forward voltage plot. By default, typical forward voltage curves are shown at 25 and 125 degree Celsius. By moving the mouse cursor over the curves, you can read numeric values. Curves at other temperatures can be added or removed. Maximum forward voltage can be plotted by clicking on the corresponding button. Forward current range can be changed by clicking on chart options. Reverse characteristics plot shows leakage current function of reverse voltage. It works in the same way as forward chart. Dynamic table and dynamic plot are powerful features. They make possible to explore diode's electrical characteristics at any best condition and junction temperature. We can use them to make quick comparison between diodes. For example, let's compare a field effect diode to a shot key diode. FERD-20H-100STS versus STPS-20H-100CT. STPS-20H-100CT has a dual diode's configuration with common cathode. So let's connect the two dies in parallel to make an equivalent diode to the field effect one. We can observe that the field effect diode, FERD-20H-100STS, offers lower forward voltage over the shot key diode, especially at low current, which is a good advantage in rectification diode of flyback converters. The other important feature of shot key and FERD-20H-100CT is the Paralysis Calculation Module. To launch this module, you must have at least one diode selected. Paralysis calculation is done in a two steps procedure. The first step is to reproduce the application waveforms using a waveform editor. The second step is to associate created waveforms to selected diodes to obtain Paralysis. Let's introduce waveform editor module. This module allows to reproduce application current and voltage waveform patterns. To make this process simple, most common patterns of current voltage of switch mode power supplies are already predefined. The user has just to set amplitude, on time, off time, and switching period. For more complicated waveform, it is possible to import a waveform defined in the text file. Please refer to the user manual for more details about this procedure. Once a waveform is set, click on OK. The waveform is then available to make Paralysis calculation. Now, we can create one or several Paralysis simulations by associating created current voltage waveforms with selected diodes. In this example, we only have one diode selected and one waveform. Let's create a simulation. If you have several diodes in parallel, you can specify it in the simulation configuration up to six dice in parallel. The Paralysis are now ready. Click on Refresh button to show the results. This plot allows to explore Paralysis of the diodes. For shutkey and field effect diodes, we only have conduction and reverse Paralysis. We can observe the well-known effect of the exponential dependence of leakage current with temperature of shutkey diodes. So, the Paralysis curve function of junction temperature is very useful for assessing safe temperature limit in application. The tool gives the possibility to analyze different combinations of Paralysis. Conduction only, typical or maximum. Reverse only, typical or maximum. Or Total Paralysis, which is the sum of conduction and reverse Paralysis. You can export the figure as an image or export the data as a text or CSV file to work on it in a spreadsheet software like Microsoft Excel. Previously, we compared electrical characteristics of a field effect diode versus a shutkey diode. In the same way, we can also perform Paralysis comparison. Again, let's compare FERD-20H100STS and STPS-20H100CT. First, we have to define current and voltage waveform. This waveform shows current and voltage pattern that can be found in a rectification diode of a 19V 40W flyback notebook adapter. Next, we define a simulation profile for each diode. Calculated Paralysis shows the advantage of the field effect diode that has been observed in electrical characteristics curves. Up to 120 degree Celsius, FERD-20H100STS offers lower Paralysis, which means we can expect better efficiency in the power supply. Thank you for watching this video. We hope you enjoy using shutkey and FERDE tools.