A dual interleaved buck converter could be suitable.
Schematic of my simulation:
The switches must be replaced by mosfets/transistors. Component values are theoretical and can be changed.
A single buck converter will not give you 9A. It only provides as much current as is available from the supply (that is, 6A).
Another type is transformer based (flyback). I had a simulation going, and I tried to make a transformer which provides 5V to the load. I have not succeeded. (Sending pulsed DC through a transformer gets tricky.)
Hi Prashanttiyagi
As Bradtherad said one of the best solutions is a buck converter . but there is another way available too . i think with this low voltage , you don't need any isolation , so a simple flyback converter , with non isolated feedback ( with two resistors and a common ground ) can be ok too .
But another thing , if you use a buck converter in discontinuous mode , out put current can be higher than input current .
Best Wishes
Goldsmith
thanks to all for this
but i told that i am new for this field
so please help me by sending some links or data for basic knowledge of these kind of supply
Hi again , if you are new , at this , process , i think you'd better to take a look at datasheet of UC3845 . it will be interesting ! then i think we can guide you more .
Best Wishes
Goldsmith