Several basic device parameters should be considered:
Repetitive Peak Reverse Voltage (VRRM) - Repetitive peak
reverse voltage is the maximum allowable instantaneous
value of reverse voltage across the rectifier diode. Applied
reverse voltages below this maximum value will produce only
negligible leakage currents through the device.Voltages in
excess of this maximum value, however, can cause circuit
malfunction - and even permanent component damage -
because significant reverse currents will flow through the
device. For example, Vishay General Semiconductor’s
GP02-40 rectifier diode has a peak reverse voltage rating
(VRRM) of 4000 V, maximum. Applied reverse voltages of
4 kV or less will produce a maximum reverse leakage
current, IR, of 5 μA through the device when operated at
room temperature (25 °C). In most cases, this leakage
current is considered negligible, and the device is said to be
completely blocking (IR = 0).
In the case of the three circuits of figure 1., the maximum
reverse voltage seen by each rectifier diode is 2 Vm. So
devices must be selected with reverse voltage (VRRM) ratings
of at least 2 Vm.
Reverse Recovery Time (trr) - In general terms, reverse
recovery time is a measure of the time needed for a rectifier
diode to reach a state of complete blocking (IR = 0) upon the
application of a reverse bias. Ideally, this time should be
zero. In reality, however, there’s a finite period of time in
which a stored charge at the diode junction must be “swept
away” before the device can enter its blocking mode. This
stored charge is directly related to the amount of forward
current flowing through the device just prior to the application
Several basic device parameters should be considered:
Repetitive Peak Reverse Voltage (VRRM) - Repetitive peak
reverse voltage is the maximum allowable instantaneous
value of reverse voltage across the rectifier diode. Applied
reverse voltages below this maximum value will produce only
negligible leakage currents through the device.Voltages in
excess of this maximum value, however, can cause circuit
malfunction - and even permanent component damage -
because significant reverse currents will flow through the
device. For example, Vishay General Semiconductor’s
GP02-40 rectifier diode has a peak reverse voltage rating
(VRRM) of 4000 V, maximum. Applied reverse voltages of
4 kV or less will produce a maximum reverse leakage
current, IR, of 5 μA through the device when operated at
room temperature (25 °C). In most cases, this leakage
current is considered negligible, and the device is said to be
completely blocking (IR = 0).
In the case of the three circuits of figure 1., the maximum
reverse voltage seen by each rectifier diode is 2 Vm. So
devices must be selected with reverse voltage (VRRM) ratings
of at least 2 Vm.
Reverse Recovery Time (trr) - In general terms, reverse
recovery time is a measure of the time needed for a rectifier
diode to reach a state of complete blocking (IR = 0) upon the
application of a reverse bias. Ideally, this time should be
zero. In reality, however, there’s a finite period of time in
which a stored charge at the diode junction must be “swept
away” before the device can enter its blocking mode. This
stored charge is directly related to the amount of forward
current flowing through the device just prior to the application
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