A series load resonant dc-dc converter uses a full bridge converter driving the series resonant load (rather than a half bridge as described in the notes and shown in the Figure below). The resonant circuit uses a lμH inductor and a 47nF capacitor. The capacitor on the output of the rectifier is 400uF and the load resistance can be in the range from 1 to 42. The DC input voltage is 400V and the required output voltage across the load resistance is 300V. i) Determine the range of switching frequencies required to supply the load at a constant voltage of 300V across the range of load resistances. [8 marks] ii) Calculate the peak voltage across the resonant capacitor and the peak current in the inductor current. Assume worst case load conditions. ir iii) [4 marks] Accurately sketch the waveforms of the output voltage of the full bridge, v, the resonant inductor current, the input voltage, voi, and current, i,, to the rectifier circuit. (You can use LTSpice to help you.) [6 marks] ++ 4000 T L₁ C 2 572 V₁ C₂ This is a bridge half T 4 3000 1-45 Co R ++