The steady-state duty cycle of the buck converter is k = 50, and the output power is 150 W at an average output voltage of Va = 20 V. If the duty cycle is changed by a small amount of ? = +5, use the small-signal model in Figure 5.33a to determine the percentage change in the input current I1 and output voltage V2.

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i₁(1) V₁(0) iz(1) + V₂(1) V₁ + V1₁ h+h (a) Buck converter 1:k 12+12 V₂+ V2 i₁(1) V₁(0) iz(1) + V₂(1) V₁ + V1₁ h+h (a) Buck converter 1:k 12+12 V₂+ V2