Design and Simulation of a Buck Converter

Design and Simulation of a Buck converter to convert a 24 V DC voltage from a small solar panel to a variable DC supply at the output with less than 5% voltage ripple. You should have the duty cycle control to regulate the output voltage of the DC-DC Buck converter. Please follow the following steps and record the results in your final report.

1) Characterize the power semiconductor switch. You will use MOSFET for your power semiconductor device.

(a) Connect your device in a simple circuit and test the required gate voltages for turn-on and turn-off of the device.

(b) Vary the gate voltage and record the drain current, ID (for MOSFET). Show the plot in your report and make comment when the device is fully conducting.

(c) From step (b), use a gate voltage where the device is conducting. Vary the Drain-to-Source voltage, VDS (for MOSFET) and record the ID values. Make a plot using your data.

2) Select the switching frequency and other passive component values (i.e. inductor, capacitor and MOSFET sizes) for 12 V, 9 V and 30 V outputs with less than 5% voltage ripple.

3) Draw the Buck converter (without any controller) in a LTSPICE circuit simulator and simulate the converter circuit. Show the voltage outputs for different duty cycle ratios. Please use MOSFET to implement the diode in your circuit. Simply use two MOSFETs and complimentary gate pulses.

4) Theoretically derive the converter ratio, M(D), and Power Efficiency (η) of the Buck converter and make MATLAB plots of the M(D) and η parameters.

Make a comprehensive final project report (IEEE format).