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Table 4 Comparison of stability analysis in digital domain of BBC in boost mode of operation

From: Characterization of analog and digital control loops for bidirectional buck–boost converter using PID/PIDN algorithms

SystemPM (degrees)GM (db)ωg (rad/s)ωp (rad/s)Delay margin (samples)Stability state
Open loop (digital_withoutpid)19.8InfInf31.50.111Stable with poor dynamic response
PID control (digital_PID_Cloop)177 and 158InfInf31.1 and 31.30.994 and 0.878Stable with good dynamic response
PIDN control (digital_PIDN_Cloop)82.5InfInf31.40.459Better stable with good dynamic response