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1. Un convertidor boost presenta una entrada de 5 V y una salida de 20 W a 15 V. La corriente mínima en la bobina no debe ser menor que el 50 % de la media. El rizado de la tensión debe ser menor que un 1 %. La frecuencia de conmutación es de 30 kHz. Determine el ciclo de trabajo, el valor mínimo de la bobina y el valor mínimo del condensador Vi ≔ 5 V

Po ≔ 20 W

Vo ≔ 15 V ΔILminp ≔ 50

Vi = 666.667 ⋅ 10 -3 D ≔ 1 - ―― Vo

ΔVop ≔ 0.9

Vo 2 = 11.25 Ω R ≔ ―― Po

ΔILminp =2 A ILmin ≔ Il ⋅ ――― 100 Vi = ⎛⎝2.778 ⋅ 10 -5⎞⎠ H L ≔ D ⋅ ――― ΔIL ⋅ f D ⋅ Vo = ⎛⎝2.195 ⋅ 10 -4⎞⎠ F C ≔ ―――― ΔVo ⋅ R ⋅ f

f ≔ 30 kHz

Vi =4 A Il ≔ ―――― 2 R ⋅ ((1 - D))

ΔIL ≔ 2 ⎛⎝Il - ILmin⎞⎠ = 4 A ΔVop = 0.135 V ΔVo ≔ Vo ⋅ ――― 100

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