Question
What is the input impedance of COMP pin of L5991? I need it to compute feedback loop gain of a flyback power supply.
I'm designing a insulated 45V 54W flyback power supply using L5991. Feedback is closed via TL431 and an optocoupler, as in figures 33 and 34 of datasheet. To compute the loop gain I need to know the impedance of COMP pin but I don't find it in datasheet.
May anyone help me? Thank you in advance. Best regards.
