Interpretation and Prediction of Loop Gain Characteristics For Switching Power Converters Loaded with General Load Subsystem

This paper presents a qualitative method to analyze and interpret loop gain characteristics of switching power converters loaded with a practical load subsystem. Effects of the load subsystem´s input impedance on the loop gain of switching power converters are investigated. Based on the analysis results, a simple qualitative method is established that facilitates the interpretation and prediction of the loop gain characteristics for switching power converters. Theoretical predictions of the paper are supported by both computer simulations and experimental results