![]() Since the average voltage across an inductor is zero for periodic operation,Ħ-41) Discontinuous current for the buck-boost converter: Let DT be the time that the switch is closed and D1T be the time that the switch is open and the current in the inductor is positive. When the switch is open in the interval (1 - D)T, When the switch is closed, the voltage across L2 for the interval DT isĪssuming that the voltage across C1 remains constant at its average value of Vs The value of C is 56.8 ♟ for the worst case of Vs = 10 V and P = 10 W.Ħ-34) Equation (6-69) for the average voltage across the capacitor C1 applies: Using another common criterion of ΔiL = 40% of IL, again for 14 V and 10 W, L = 104 µH. Select the value of L at least 25% larger than Lmin (26.1 ♟). The value of L should be based on Vs = 14 V and P = 10 W, where Lmin = 20.9 µH. The current is then expressed asĪnd using f = 100 kHz (designer’s choice), results are shown in the table. The output voltage is mainly the dc term and the first ac term.Ĭapacitor current: (define t=0 at peak current)Ĭapacitor current: For convenience, redefine t = 0 at the peak current. Other values of L and C are valid if the inductor current is continuous with margin.Ħ-12) (Based on the example design in 6-11) ![]() ![]() Prévia do material em texto CHAPTER 6 SOLUTIONS
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