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Switch Mode Power Supply Measurements

Switch Mode Power Supply Measurements

Keysight Technologies, Inc. 3000T and 4000 X-Series oscilloscopes with the Power Measurements option provide a quick and easy way to analyze the reliability and efficiency of switching power supplies. This application note provides step-by-step instructions on how to perform a broad range of power analysis measurements on your switch mode power supply (SMPS), as well as detailed instructions on how to perform these same measurements when using Keysight’s SMPS Measurements Training Kit as the device under test (DUT).

The following power analysis measurements are enabled when a Keysight InfiniiVision 3000T or 4000 X-Series oscilloscope has been licensed with the Power Measurements option (DSOX3PWR or DSOX4PWR):

  • Input analysis
    – Power quality
    – Current harmonics
    – Inrush current
  • Switching/modulation analysis
    – Switching loss
    – Slew rate
    – Modulation
  • Output analysis
    – Output ripple
    – Turn on/Turn off
    – Transient response
    – Power supply rejection ratio (PSRR)
    – Efficiency

 

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