How to Test Switch Mode Power Supplies with an Oscilloscope

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If you are working with switch mode power supplies, you are likely trying to improve efficiency, increase power density and reliability, comply with EMC regulations, improve power rail integrity, and decrease thermals. This is a lot to think about, and all this design optimization can increase test time. Learn how to easily test your switch mode power supplies and save time in the lab. The primary purpose of a power supply is to efficiently produce well-regulated and low-noise DC power from an input power rail. This video will show you how to test your switch mode power supplies with an oscilloscope. An oscilloscope is the most common tool for making power supply measurements since you can hook up both a voltage probe and a current probe to calculate power. Another reason why oscilloscopes are a great tool for characterizing power supplies, are the analysis applications that can run on them, making testing much more efficient. We'll demonstrate how to use power applications to efficiently measure and characterize your switch mode power supply.

To try out these measurements on your Keysight InfiniiVision oscilloscope, download a free trial of the power application software here: https://www.keysight.com/find/free-sw-trial-oscilloscopes

Learn more about testing switch mode power supplies in this webcast: https://www.youtube.com/watch?v=VLzcV9Sxt5Q

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The digital storage oscilloscope we used: Keysight InfiniiVision DSO-X 4154A http://bit.ly/4000XScope

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