Why Zener Diode Is Not Used In Rectifiers?

What is difference between rectifier and zener diode?

Although they are both called diodes they have very different uses.

Rectifier diodes are used mainly for only allowing current/voltage to flow in one direction.

Zener diodes work a little differently, they conduct in reverse and can then recover unlike rectifier diodes..

Why zener diode is not used in forward bias?

Zener diodes are highly doped diodes. This means their behavior in forward bias will be same as a normal diode. But while in reverse bias their junction potential is increased. … So that means when the voltage crosses 6V then the diode is in Reverse breakdown and hence the current through the diode increases rapidly.

Does a Zener diode have resistance?

Zener impedance is the equivalent series resistance of a Zener diode when it is conducting current. It is calculated as a change of Zener voltage, ΔVZ, that occurs as a result of a tiny change in Zener current, ΔIZ. Zener impedance should ideally be zero, but in reality, a Zener diode has some impedance.

What is purpose of Zener diode?

Zener diodes are used for voltage regulation, as reference elements, surge suppressors, and in switching applications and clipper circuits. The load voltage equals breakdown voltage VZ of the diode. The series resistor limits the current through the diode and drops the excess voltage when the diode is conducting.

What is meant by zener voltage?

Zener Voltage. The voltage that is sufficient for the reverse breakdown condition thus allowing the diode to conduct in the reverse direction.

Can a diode be used as a rectifier?

Rectifier diodes (large current) Rectifier diodes are used in power supplies to convert alternating current (AC) to direct current (DC), a process called rectification. They are also used elsewhere in circuits where a large current must pass through the diode.

What is the difference between a diode and zener diode?

Diode can conduct current only in one direction, whereas zener diode allows the conduction in both directions. 2. A normal diode will be permanently damaged for a large reverse current, but a zener diode will not. … Diodes are normally used for rectification, whereas zener diodes are used for voltage regulation.

Why diodes are used in rectifiers?

Diodes are widely used semiconductor device. A rectifier diode is a two-lead semiconductor that allows current to pass in only one direction. … Rectifier diodes are a vital component in power supplies where they are used to convert AC voltage to DC voltage.

What is the application of a diode?

The application areas of diodes include communication systems as limiters, clippers, gates; computer systems as logic gates, clampers; power supply systems as rectifiers and inverters; television systems as phase detectors, limiters, clampers; radar circuits as gain control circuits, parameter amplifiers, etc.

Why zener diode is heavily doped?

Zener diode is heavily doped than the normal p-n junction diode. Hence, it has very thin depletion region. … When the Reverse bias voltage reaches the breakdown voltage in normal PN junction diode, the current through the junction and the power dissipated at the junction are relatively high.

What is Zener effect and Avalanche effect?

The Zener effect is distinct from avalanche breakdown. … The avalanche breakdown occurs in lightly doped junctions, which produce a wider depletion region. Temperature increase in the junction increases the contribution of the Zener effect to breakdown, and decreases the contribution of the avalanche effect.