How can I get a bode plot from buck converter circuit schematic?

Hi,

I've simulated the following circuit (https://ibb.co/kOY2Bw) and tried to draw the bode plot with the input and outputs shown in the circuit schematic. However, as seen in linear analysis tool (https://ibb.co/iw5M4G), I couldn't do it. Can you explain why I can't get bode plot properly?

[Birdman]

Can you share your model?

[Nicolas Schmit]

The PWM block is a highly nonlinear block. The linear analysis tool might not linearize it in a meaningful way.

[Olgun Erdogan]

Here is my model.

[SimTec]

hello Nicolas, I have the same problem and my PWM block is just a Matlab function .how do we linearized it then?

Answer 1

[Abhishek Ballaney]

https://in.mathworks.com/discovery/bode-plot.html