Help needed in DC-DC converter

[Abhishekabs]

Hello Friends,
I am new in this field of designing DC-DC converter.
I want to make DC to DC converter with following specs.

Output current 20 A
Input Voltage varies from 12 to 35 V
Output Voltage 13 V DC


Also I need good EMC performance.

Can any body suggest me good solution?
How should I go further? Which DC-DC converter IC should I use?
Which FET should I use?

Please help me out

Thanks

 

[willi65]

Hi..

i think the best are an push pull converter..u can use the SG3524..the EMC good..

 

[blah1]

Your input voltage varies wildly, so you'll need a good control solution. I suggest having a look at UCC38C4x series of controllers from TI. Seach their website for that part and read the application note. It should get you started.
HTH
-Igs

 

[Abhishekabs]

Sorry for delay.
Thanks for the replies.