Measuring Power Supply Switching Loss with an Oscilloscope

Measuring Switching Loss with an Oscilloscope

Losses due to dissipation in switching devices such as MOSFET's and IGBT's contribute significantly to the overall losses in switch mode power supplies.  This application note explains how to measure switching loss and conduction loss in power supply switches using an oscilloscope equipped with a current probe and differential voltage probe.  It covers both manual and automated techniques, along with guidance on making connections.




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