A MOSFET rated for 15 A, carries a periodic current as shown in figure. The ON state resistance of the MOSFET is 0.15 Ω. The average ON state loss in the MOSFET is [Figure description: A plot of current versus ωt: a rectangular pulse of height 10 A from 0 to π, zero from π to 2π, again 10 A from 2π to 3π, and so on (square pulse train, 50% duty cycle).]
- A. 33.8 W
- B. 15 W
- C. 7.5 W
- D. 3.8 W
Answer: C. 7.5 W
Explanation: MOSFET conduction power loss P = I_rms² × R_ds(on) = 7.5 W.