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Special Measurements

Power Switching Loss

Revision 1.0, November 2013
By: ASA
Free

Description

This Special Measurement provides parameters for the measurement of Switching Loss across the FET of a switching power supply.

Specifications/Details

Spec Level:  N/A

App Update Level/Date:      1.0, November 2013

Minimum M1 version required:      v7.00

Measurements Made:

  • There are 3 DLLs in this Special Measurement:
    • Measure Switching Loss during Turn-On time and Turn-Off time
    • Measure Switching Loss during Conducting and Non-Conducting time
    • Measure Total Switching Loss across the entire switching cycle
  • For each time interval, the following parameters are measured:
    • Minimum Switching Loss in that interval across all cycles evaluated
    • MaximumSwitching Loss in that interval across all cycles evaluated
    • Mean Switching Loss in that interval across all cycles evaluated
    • Standard Deviation of the Switching Losses in that interval across all cycles evaluated
    • Number of cycles evaluated (Total DLL only)
    • Switching Frequency (Total DLL only)

Statistics Produced:

  • (as listed above)

Assumptions:

  • Voltage (V) and Current (I) probes should be placed as shown below:

probing diagram

 

 

 

 

 

 

Features

  • Not Applicable for this App

Comments

  1. The user can select whether they wish the results to be displayed in Power (Watts) or Energy (Joules) units.
  2. ASA is in the process of adding a variety of power-related Measurement Apps, to be followed shortly by a complete Power Application to organize and expand these measurements.

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