Other Parts Discussed in Thread: LM5157
Tool/software:
Hi,
I am doing the AC Sweep simulation for LM5157 Sepic converter by using the Average model suggested by TI.
I have connected the AC source in series with the FB line and try to do the Bode plot with trace expression "Bode plot dB-Seperate(V(Vout)/VACIN)). This will be across the AC source (Vout is OUT side and VAC IN is other side of the AC source). But my results is not as expected. Whether i am doing the right methode? or any limitation to the LM5157 model to perform this kind of Simulation.
I have checked the Average model simulation provided by TI, but here the AC source is connected to GND through capacitor (Value 100Meg), also one high value 100Meg inductor added at the secondary. This is not the SEPIC i thing.
Can you help me by providing some details, how to perform the Bode plot analysis for SEPIC converter using LM5157 IC.
Regards
Rayees
