for 10 A output buck converter design

[Nicx]

are there any specific tips or precautions to be taken when designing a buck converter with a 10 A output? for example, are there stages needed? or extra safety circuits needed anywhere? or can a basic configuration work just fine?

ive constructed one and im using a UC3843 PWM controller for the gate drive of the mosfet and my inductor is a ferrite core toroid awg12 magnet wire. i selected the mosfet and diode to be adequate for 10 A. is there anything else i need to consider? i really need help. i get stuck at 3 A load. further than that, the supply voltage starts to drop and apparently gets drawn into the circuit. my design was based on these specs: Vin min = 30V, Vin max = 60V, Vout = 24V Iout max = 10A.

 

[Tahmid]

Hi,
You could add a short-circuit/overload protection using shunt and comparator so that no damage is done if the load pulls too much current or shorts the output. Anyway, could we have a look at your schematic?

Hope this helps.
Tahmid.

 

[exnol]

Maxim has got great design guides/tutorials. So has TI. Here is link to maxim's site :

**broken link removed**

 

[Nicx]

hi thanks for replying. here's my schematic. my inductance is currently 22uH

 

[exnol]

I am not much sure, since I am not familiar with switchers. But still, do you think R12 is needed? It's current feed back, so I guess R12 not needed.