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Applications
Half wave Rectifier (fig.17)
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                                       Fig.17

In positive half cycle, D is forward biased (ideal) and output voltage is same the input voltage. In the negative half cycle, D is
reverse biased, and output voltage is zero.
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When the diode is reverse biased, entire transformer voltage appears across the diode. The maximum voltage across the
diode is Vm. The diode must be capable to withstand this voltage. Therefore PIV rating of diode should be equal to Vm in
case of single phase ?  halfwave rectifiers. The avg-current rating must be greater than Iavg

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