In the buck converter, the MOSFET has on-Resistance Ron and the diode forward vo

Question

In the buck converter, the MOSFET has on-Resistance Ron and the diode forward voltage drop be modeled by a constant voltage source Vd. All other losses can be neglected. (60%) Derive a complete equivalent circuit model at steady state condition for this converter. Solve your model to find the output voltage V. Derive an expression for the efficiency. Please illustrate the following power semiconductor devices : Diodes, MOSFETs, BJTs, IGBTs and thyristors, (symbol, i-v characteristic, and idealized characteristic) (20%) The data sheets of a switching device specify the following switching times corresponding to the linearized characteristics: tri=100ns, tfv=50ns, trv=100ns, tfi=200ns. Calculate and plot the switching power loss. (Assuming Vd=300V, lo=4A, fs=100kHZ) (20%)

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