Question $2$

$($i$)$ The diagram in Figure $2($a$)$ shows a DC$-$DC converter.

$-$ Identify the type of converter, and for what type of application

$($input voltages, power range etc.$)$ it might be used.

$-$ Describe the operation of the converter and illustrate your

answer with diagrams of the main component voltage and current waveforms for continuous current mode operation.

$($ii$)$ A converter of the type shown in Figure $2($a$)$ has the following parameters:

$-$ Input voltage: $325$ V

$-$ Output voltage: $12$ V

$-$ Output current: $2$ A

$-$ Transformer primary turns: $16$

$-$ Transformer secondary turns: $1$

The converter is designed so that the inductor ripple current is $\backslash (20\backslash \%\backslash )$ of its average value.

Four different MOSFETs with the parameters given in Table $2$ are available to use as the switch.

$-$ Which MOSFET is best for this application? Give reasons for your

answer.

Table $2.$