Consider the dc-dc Ćuk converter circuit shown in Fig. ECSE F2019-E2-7a (below). The converter is operating at 50 Hz with L1 = L2 = 1 mH and C1 = 5 μF. The source voltage is Vd = 10 V, and the load voltage is regulated to be constant Vo = 5 V. The converter supplies 5 W to the load. Assume CCM and minimum current ripple.
A) Calculate the duty ratio D
B) Calculate output current and the average source current
C) Sketch the waveforms of iC1
D) Calculate the rms current flowing through C1
iLI
iL2
UCI
L1
ULI
Va