loop study of DC/DC converter

[michaelhu]

I have several paper for DC/DC converter control loop.

 

[michaelhu]

This paper is talking about "current-mode control"

 

[lj053]

Can you give us the spice model of the switch.
Can spectre do the loop simulation with the spice model?

 

[flutecn]

this paper is a model mean about dc/dc
I am pleased if it could help

 

[lj053]

hi flutecn

Can you use spectre to simulation the loop phase margin?

 

[michaelhu]

yes, you can use spectre to do simulation. However, before you simulate, a model circuits should be ready. The circuits, I think, include Gm for error AMP, output impedence of error amp, current sense Gmcs, Cout, Rout and feedback ratio. Any way, make sure the pole/zero related to inductance should be much higher than crossover frequency.

 

[jonneylu]

if you want to know voltage mode feedback,you may read"simple seitcher and other switcher architectures" of NS.

 

[lj053]

yes, you can use spectre to do simulation. However, before you simulate, a model circuits should be ready. The circuits, I think, include Gm for error AMP, output impedence of error amp, current sense Gmcs, Cout, Rout and feedback ratio. Any way, make sure the pole/zero related to inductance should be much higher than crossover frequency.

hi:
But i don't know how to deal with the comparator,pwm generator and the buf.
Maybe you can give some more help.thanks.