Question eight
For a 12-V input, 1.0-V output, 4-MHz 25-A buck converter, the designer wants to get the best performance and minimum loss on the low side (Sync) FET. The controller has a minimum dead time of 25 ns. dIL = 4 A. Calculate the Sync FET losses assuming a BSZ0901NS. (Hint: From the BSZ0901NS data sheet, VDS = 30 V, RDS(on)max = 2.1 mΩ, ID=25 A. Qrr = 2 nC, VSD (30A)= 0.75 V, Freq = 4MHz)
A. 0.94 W
B. 3.0 W
C. 4.44 W W
D. 6.2 W
E. 2.7 W
[…] Go to the quiz […]