9 An unregulated dc input voltage varies over the range 35 V V, 70...
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9 An unregulated dc input voltage varies over the range 35 V ≤ V, ≤ 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 ≤ 1 kW. The element values and the switching frequency are: L = 22 µH C = 470 μF fs = 75 kHz Losses may be ignored. (a) Over what range of V, and load current does the converter operate in CCM? (b) Determine the maximum and minimum values of the steady-state transistor duty cycle. 9 An unregulated dc input voltage varies over the range 35 V ≤ V, ≤ 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 ≤ 1 kW. The element values and the switching frequency are: L = 22 µH C = 470 μF fs = 75 kHz Losses may be ignored. (a) Over what range of V, and load current does the converter operate in CCM? (b) Determine the maximum and minimum values of the steady-state transistor duty cycle.
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Related Book For
Advanced Financial Accounting
ISBN: 978-0078025624
10th edition
Authors: Theodore E. Christensen, David M. Cottrell, Richard E. Baker
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