Hi all,

Can anyone provide me working feedback circuit for buck converter.
Here output of buck is 13V.

 

All you need is the feedback circuit?
What about the rest of the circuit?

 

Often one or two resistors will do the trick.

You need to ask a more detailed question in order to obtain a helpful answer.

Schematic diagram?

What chip/controller are you using.

 

I tested the feedback circuit with voltage divider. But it is not working perfectly.
Controller used is dspic30f2010. Frequency for PWM is 50Khz.
Circuit is synchrounous buck converter. Aim is to convert 24Vdc 100A to 12Vdc for load 500W.

 

Why it has to use a chip ?
What if we are going analog with discrete components all the way... Who has a working schematic?
Everyone is scientist enough to use a ready controller

 

tested the feedback circuit with voltage divider. But it is not working perfectly.

And how is it "not working perfectly"?

 

100A?! That's a lot to expect from a home brew switching regulator and at 50kHz your going to need a very beefy inductor. Your really best looking for an off the shelf IC that can cope with this, as the manufacturers put a great deal of working into optimising efficiency and minimising noise, as well as preventing cross over, instability etc.