![]() ![]() The range available is wide, with different voltage ratings, on-resistances and package styles, and there is always the option to parallel parts. An optimum SiC FET for performance and cost can be found, but until now it has meant tediously iterating through simulation or bench testing with different parts. Now, UnitedSiC’s online FET-Jet Calculator has changed all that. The calculator takes care of that initial part selection. The tool is free-to-use without any registration and enables a designer to select an application, topology, electrical design parameters and ambient temperature, and quickly try a device from UnitedSiC’s range of SiC FETs and diodes with a chosen heatsink rating. ![]() Critical performance results are instantly calculated, including overall efficiency, with component losses separated out into dynamic and conduction contributions, along with junction temperatures and current stress levels. If a resulting voltage is above the rating of the selected part, a warning is given.ĭelving a little deeper, the applications that can be selected are AC-DC front-ends and isolated or non-isolated DC-DC converters. Within each application, a topology can be chosen from the most popular. For example, in the AC-DC category, a traditional boost PFC, Totem Pole PFC, Vienna Rectifier, or Two-Level Voltage Source Inverter are featured. In the non-isolated DC-DC category, buck or boost can be selected with or without synchronous rectification along with the three-level boost topology. In the isolated DC-DC category, the popular LLC converter can be selected, in either half or full bridge variants, along with the Phase-Shift Full bridge or Dual Active Bridge with phase shift control. Where relevant, conduction modes from continuous (CCM) to boundary (BCM) are supported. SiC FETs and diodes from the UnitedSiC range can be selected from drop-down menus which are regularly updated with the latest device releases and, helpfully, clicking on a device links to its product page with links to the datasheet and SPICE model. The displayed list of devices can also be sorted by rated voltage, package and series, with a slider restricting the selection to a rated current range.Īn example is the best way to show the power of the calculator if we select a Phase Shift Full Bridge topology in the isolated DC-DC section, we see the screen below.įigure 1: An example screenshot of the UnitedSiC FET-Jet calculator ![]()
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