An unregulated dc input voltage Vg varies over the range 35 V ≤ Vg ≤ 70 V. A buck converter reduces this voltage to 28 V; a feedback loop varies the duty cycle as necessary such that the converter output voltage is always equal to 28 V. The load power varies over the range 10 W ≤ Pload ≤ 1000 W. The element values are L = 22 µH C = 470 µF fs = 75 kHz Losses may be ignored. (a) Over what range of Vg and load current does the converter operate in CCM? (b) Determine the maximum and minimum values of the steady-state transistor duty cy- cle.

An unregulated dc input voltage Vg varies over the range 35 V ≤ Vg ≤ 70 V. A buck converter reduces this voltage to 28 V; a feedback loop varies the duty cycle as necessary such that the converter output voltage is always equal to 28 V. The load power varies over the range 10 W ≤ Pload ≤ 1000 W. The element values are L = 22 µH C = 470 µF fs = 75 kHz Losses may be ignored. (a) Over what range of Vg and load current does the converter operate in CCM? (b) Determine the maximum and minimum values of the steady-state transistor duty cy- cle.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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