How to design the feedback loop for the current-mode buck co

[ZhangJian]

Dear all:

I am building a buck converter to charge a battery, and the battery and the buck converter have been built, but I need a current mode feedback to charge the battery in a constant current.

I will upload some files to help you to understand.

In the first file, you can see the feedback is composed of compensator and modulator (comparator). But this document tells me how to build the feedback in voltage mode not current mode. I know I also need compensator and modulator in my current feedback. and I am not sure the difference of the two modes, because I need keep the current constant. What is more, I think you can understand what I want to build from the first document, because I think it is quite similar.
the first file is the link below
http://www.elecinfo.com/upload/communit ... -82913.pdf

And my circuit is like file2, and I will upload the Ltspice file too, if you can download the Ltspice which is free you can check it out.


Thanks and Regards,
ZJ