Hello Shuai,
That's a very large range for Vin and Vout.
I found a reference design for for a 4-switch buck-boost that is very close to those requirements: PMP21278 .
Vin = 9V to 50V, Vout = 12V, Iout = 25A.
There is also a design for USB-C at 20V…
Hello,
Yes the inductor will affect the efficiency of the efficiency of the converter. One way to improve efficiency is to find an inductor with a relatively lower dc resistance. MOSFET selection has a large influence on efficiency and should be selected…