How to compensate DC-DC voltage mode control?

[bomba]

I'm using the lm3524 and I want to know if it necessary to compensate, and witch is the better way to compensate the feedback control. I read about single-pole, zero-pole pair and two-pole-two-zero compensation. But the advantages of these techniques are not clear for me. Although, is it possible implement a PID compensation?

Any suggestions are welcome

Thanks in advance

 

[VVV]

First of all, what topology are you using? The compensation network has to be designed accordingly.

For good transient response performance, the closed-loop bandwidth has to be as high as possible, with adequate phase margin.

As a general rule, the single-pole (or dominant pole) compensation will result in poor transient response, as the dominant pole will be placed at a low frequency, thus limiting the bandwidth.

For a forward topology in voltage mode you are best off with a two-pole-two-zero compensation.

 

[IanP]

The error amplifier of the LM3524 has nominal gain of ≈85dB (open circuit at pin 9) and is usually set by output loading. Typical valuse are 50kΩ resistor in series with 1nF capacitor between pin 9 and GND, and that is your compensation.
In fact you can use no compensation at all by connecting only pure resistive load..

 

[bomba]

I planing to use a full bridge topology, or a half bridge topology.

VVV do you know a good bock, paper, document or link about this subject.

Thanks you

 

[VVV]

The book I know is Abraham I Pressmann's "Switching Power Supply Design".
I think it's pretty good. I also have Keith Billings's book, but I think Pressmann is better.

Also, D. Venable is renowned in the industry for his stability analysis. Check out the knowledge base of Venable Industries.
www.venable.biz/tr-papers2.html

Search the board for Venable, too.