1. Buck-boost converter design. A variable-voltage-output supply is designed to use a regulated input voltage VRAW = +12 VDC to provide ative output voltage V, in the range of -6 to -18 VDC. The max current drawn from the supply output is 0.5 A, and the largest tol ripple voltage VRIPPLE is 50 mV (peak to peak). ВВ (a) Find the values for duty cycle DBB that will provide the needed voltage variation, and indicate which duty-cycle value correspo which output voltage, assuming an ideal switch is used. (b) If a switch frequency f= 100 kHz is used, find the value of C requi keep the peak-to-peak output ripple voltage less than 50 mV.
1. Buck-boost converter design. A variable-voltage-output supply is designed to use a regulated input voltage VRAW = +12 VDC to provide ative output voltage V, in the range of -6 to -18 VDC. The max current drawn from the supply output is 0.5 A, and the largest tol ripple voltage VRIPPLE is 50 mV (peak to peak). ВВ (a) Find the values for duty cycle DBB that will provide the needed voltage variation, and indicate which duty-cycle value correspo which output voltage, assuming an ideal switch is used. (b) If a switch frequency f= 100 kHz is used, find the value of C requi keep the peak-to-peak output ripple voltage less than 50 mV.
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10.10. Buck-boost converter design. A variable-voltage-output supply is to be
designed to use a regulated input voltage VW = +12 VDC to provide a neg-
ative output voltage V, in the range of -6 to -18 VDC. The maximum
current drawn from the supply output is 0.5 A, and the largest tolerable
ripple voltage VRIPPLE is 50 mV (peak to peak).
BB
(a) Find the values for duty cycle Dg that will provide the needed output
voltage variation, and indicate which duty-cycle value corresponds to
which output voltage, assuming an ideal switch is used.
(b) If a switch frequency f= 100 kHz is used, find the value of C required to
keep the peak-to-peak output ripple voltage less than 50 mV.
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