Other Parts Discussed in Thread: TL431, TL431LI
Hello TI Engineers,
I am using TL431LIBQ to design the feedback compensation network for single switch forward converter. I have two questions in this regard,
1. In the datasheet Fig. 6 there is the frequency response of TL431. Could you please explain what voltage gain does it refer to? And does this put some limit in the switching frequency of our power supply?
2. Also there is dynamic impedance vs frequency curve in Fig. 8 as below:
In datasheet dynamic impedance is mentioned to be around 0.3ohm to 0.75ohm but from Fig. 8 it seems this may vary with frequency. So do I need to take into consideration the switching frequency and then this impedance while biasing the TL431?