Design of a buck converter with two switches

I need to design a buck converter with two switches (transistors) with a frequency of 330Khz. It has source voltage of 9v and outputs 3v-4v to the load.

I need to have a block diagram of all the elements for example, gate driver (LM27222), the two transistors, the u controller (TI F28027) plus J-tag pin assignments.

I am working with dip-trace, i need to have my design in order to fix my layout as soon as possible.


If anyone could just design the diagram, i will be grateful.

Roland

Dear Roland20
hope you are using TI chipsets. TI is giving the design tool(TI Swift) where you can set the desired frequencies and download the design to your PC. Otherwise, go through the datasheet and design. in worst case scenario, contact the corresponding Chipset representative and get the reference design.it may help you.

Why do you need two transistors? Is one for an active rectifier?

This was already discussed in another thread here: https://www.edaboard.com/threads/250741/.

Exactly the same requirements - probably someone else doing the same course as you.

Yes, but he probably needed the values, all I need is a schematic of the converter with elements as described above.

Goldsmith, I think you can refer to Prabesh's explanation.. i guess its clear than mine, I am fine with the values we got but what I require right now is the schematic of the whole system (Buck converter with a u-controller) then later i can fix the layout from Diptrace!


I hope it's clear now

---------- Post added at 10:15 ---------- Previous post was at 09:59 ----------

Yes, but he probably needed the values, all I need is a schematic of the converter with elements as described above.

Goldsmith, I think you can refer to Prabesh's explanation.. i guess its clear than mine, I am fine with the values we got but what I require right now is the schematic of the whole system (Buck converter with a u-controller) then later i can fix the layout from Diptrace!


I hope it's clear now

Dear Ronald
Hi
I'm a bit confused , you asking your question via PM , and then you are here in this thread !!!!!!!!
I don't know that what is your exact problem ?!?!

Oh sorry about that goldsmith, my browser got a problem so I thought i wasn't sent to the forum so i sent you a private message. Its why it appeared twice otherwise no problem.

Ok , forget it . now how can i help you ?

crutschow said:

Why do you need two transistors? Is one for an active rectifier?

Click to expand...

Absolutely!!