Hi, all! Have a nice day!
I'm a rookie in designing power-switching converter. My circuit simulation tool is HSPICE and MATLAB.
I'm designing current-mode PWM boost and buck converters for driving the white light LED.
In my thought, the PWM converter is like PLL. I need a small signal model to predict the AC response.
So I can see the phase margin and design a proper compensating network.

Is there anyone can show how to derive the small signal model for current-mode PWM converter?
Or how you to design this circuit?
Thanks very much!

BEST REGARDS

Thanks! Matthieu
Sorry I don't have other simulator but only HSIPCE. I think it couldn't handle the Periodic Steady state analysis.
I have read many papers about the small signal model of PWM.

R.B. Ridley, "A new continuous time model for current mode control"
V. Vorpérian, "Simplified Analysis of PWM Converters Using the Model of the PWM Switch: Parts I and II"

I follow the method of the paper to derive the model but still can't get the correct form.  

I referred the datasheet of NATIONAL SEMICONDUCTOR LM3430.
It said the transfer function is

Vo/Vc=Gps=Aps*(1+s/Wzesr)*(1-s/WRHP)/[(1+s/WLEP)*(1+s/(Qn*Wn)+S^2/Wn^2)]

Vo: output voltage; Vc: control voltage
Aps: DC gain
Wzer: system esr Zero
WRHP: right half plane Zero
WLEP: low frequency pole
Qn: current sampling double pole quality factor

Anyone can show how to derive this transfer function?
Or what papers or data should I refer to?
Thanks a lot!

BEST REGARDS