Consider the boost converter circuit shown. Assume that the semiconductor devices are ideal. In steady state, the inductor current rises linearly from 0 A to 6 A in the first  and then falls linearly from 6 A to 0 A in the next  of every switching cycle as shown. The load resistance  is  and the capacitance  is .

Neglect the ripple in the output voltage. What is the input voltage  ?

Consider the boost converter shown. Switch Q is operating at 25 kHz with a duty cycle of 0.6. Assume the diode and switch to be ideal. Under steady-state condition, the average resistance  as seen by the source is _______Ω. (Round off to 2 decimal places.)

In a DC-DC boost converter, the duty ratio is controlled to regulate the output voltage at 48 V. The input DC voltage is 24 V. The output power is 120 W. The switching frequency is 50 kHz. Assume ideal components and a very larger output filter capacitor. The converter operates at the boundary between continuous and discontinuous conduction modes. The value of the boost inductor (in ) is __________.

In the circuit shown all elements are ideal and the switch S is operated at 10kHz and 60% duty ratio. The capacitor is large enough so that the ripple across it is negligible and at steady state acquires a voltage as shown. The peak current in amperes drawn from the 50 V DC source is ___________. (Give the answer up to one decimal place).

A DC-DC boost converter, as shown in the figure below, is used to boost 360V to 400V, at a power of a 4kW. All devices are ideal, considering continuous inductor current, the rms current in the solid state switch (S), in ampere, is_______________.

A step-up chopper is used to feed a load at 400V dc from a 250V dc source. The inductor current is continuous. If the ‘off’ time of the switch is , the switching frequency of the chopper in kHz is____.

In the circuit shown in Figure, the source I is a dc current source. The switch S is operated with a time period T and a duty ratio D. You may assume that the capacitance C has a finite value which is large enough so that the voltage. has negligible ripple. Calculate the following under steady state conditions, in terms of D, I and R.         

(a) The voltage, with the polarity shown in Figure.

(b) The average output voltage, with the polarity shown.

The semiconductor switch S in the circuit of Figure is operated at a frequency of 20 kHz and a duty ratio D=0.5. The circuit operates in the steady state. Calculate the power transferred from the dc voltage source to the dc voltage source.