T
treez
Guest
Hello,
This Flyback power supply's vout rings at 1.2KHz when its starting up. However, the ringing ceases totally when it gets into regulation (30V =Vout). Also, there is no overshoot on start-up.
Would you say that this SMPS has poor phase margin, due to the ringing that occurs during start-up, whilst Vout is rising?
LTspice simulation and schematic attached, as well as waveform shot of vout, COMP pin (control input to PWM comparator), and the 30V line
This Flyback power supply's vout rings at 1.2KHz when its starting up. However, the ringing ceases totally when it gets into regulation (30V =Vout). Also, there is no overshoot on start-up.
Would you say that this SMPS has poor phase margin, due to the ringing that occurs during start-up, whilst Vout is rising?
LTspice simulation and schematic attached, as well as waveform shot of vout, COMP pin (control input to PWM comparator), and the 30V line