Please do the simulation.

$1$ Objective

DRIVER

The objective in this project is to design an LED Driver using chip on board $($COB$)$ or PCB power

LEDs. An LED Driver consists of a DC$-$DC switching converter powered from a DC voltage and

producing required voltage and current for the LED as depicted in Figure $1.$

Figure $1$: General structure of an LED driver.

$2$ Description of the Project

Technical details of the project are as follows:

Input voltage V$\_($in$)=5$V DC $($USB power supply or USB power bank can be employed $-$ at

least $2$A output current$),$

Output power at least $10$ W $($COB$/$PCB LED$),$ higher powers are OK$,$

Switching frequency of the converter f$\_($s$)=20$kHz$,$

Inductor current ripple Deltai$\_($L$)=20\%$ of average inductor current,

Output voltage ripple DeltaV$\_("$out $")=1\%$ of average output voltage,

Output current must not exceed rated current of the COB$/$PCB LED,

Output voltage must be adjustable so that brightness of COB$/$PCB LED can be controlled.

COB$/$PCB LED is constructed by connection of several individual LED chips in series. Typical

rated operating values are $9-12$V DC and $200-350$mA depending on the LED unit. I$-$V

curve for a single typical diode is depicted in Figure $2.$ Note that, since I$-$V curve slope around

operating point is very high, a slight increase in forward voltage will result in a large increase in

current. If current value exceeds the rated operating value, the LEDs may be damaged. Some form

of current limiting must be employed so that output current does not exceed rated value.

When LEDs are running at rated operating point, heat dissipation in LEDs can reach dangerous

levels which may cause them to be destroyed. Therefore, the COB LED must be placed on an

aluminum heat sink.

Your first task is to determine the type of switching converter and calculate component values of

all elements along with current$/$voltage ratings of semiconductor switches.

$3$ Simulation

For the component values selected in previous section, simulate the entire circuit that you proposed

using PSIM$/$PLECS software. Show that your circuit is working properly by simulating for different