請問一下 PWM Current mode 如何AC分析??

happybull

This is a very good one.
Just one question: Is this a real model for a product?
Becasue I think the number on the plot can't be real.
This circuit can't meet all load condition for sure.  DC gain is too high and ErroAmp gain too high. Also you did't counter gain from Current Mode.

Except that ,every thing is great.

happybull

MA 0.5 到 1 都是合适的. 0.75很适中
voltage mode跟current mode補償設計有不同之处.
current mode 有SLOP COMP 的POLE, 而且RCS 会有一个GAIN STAGE, 相当于在ERROR AMP 后,加了一个RCS 的GM, GAIN=ROUT/RCS.

happybull

请问MONKEYBAD,你的这片BOOST 回来了吗?
我在想应该有更好的compensation,不必用Co=100e-6.