Question

Calculate the output power of the Buck converter if the supply voltage is 4 V and duty cycle value is .1 for 4 Ω load.

(a) 40 mW

(b) 20 mW

(c) 50 mW

(d) 60 mW

This question was posed to me by my school principal while I was bunking the class.

This key question is from Solid State Controlled Drives in portion Introduction to Solid State Controlled Drives of Electric Drives

Answer 1

The correct choice is (a) 40 mW

The explanation is: The output voltage of the buck converter is Vo = Vin×(D)=.4. The value of the duty cycle is less than one which makes the Vo < Vin. The buck converter is used to step down the voltage. The output power is Vo^2÷R=40 mW.