Considerations for measuring loop gain in power supplies

Loop gain measurements show how stable a power supply is and provide insight to improve output transient response. This four-part training video series discusses the theory of open-loop transfer functions and empirical loop gain measurement methods. It also demonstrates how to configure the frequency analyzer and prepare the power supply under test for accurate loop gain measurements. Examples are provided to illustrate proper loop gain measurement techniques.

Why should I take this training?

• The loop response of a switch-mode power supply gives insight to its performance during various loading conditions
• The method of measurement is crucial in achieving an accurate result

What will I learn?

• How to accurately measure loop gain in a SMPS
• Considerations for different control methods
• Examples of measurements using modern equipment