zener diode

Advantages and disadvantages of Zener diode shunt voltage regulator

Zener Diode Shunt Voltage Regulator Circuit
Zener Diode Shunt Voltage Regulator Circuit

Read more:

Zener Diode and Its working, Characteristics and Applications.

How Zener diode work as a voltage regulator.

Advantages of Zener diode shunt regulator are given below:

  • For wider range of load currents and input voltages the Zener diode shunt regulator provide a better regulation.
  • It gives higher current capability.
  • The Zener voltage regulator is very economic.
  • It requires only two or three components.
  • It has a very simple circuit.

Disadvantages of Zener diode shunt regulator are given below:

  • Internal impedance of the Zener shunt voltage regulator circuit is high.
  • The voltage regulation is poor.
  • The output voltage in Zener shunt voltage regulator is not adjustable because the output power of Zener shunt regulator is depending on Zener voltage. It means VO ­= VZ.
  • The Zener shunt voltage regulator cannot be used for large load current.
  • Zener shunt voltage regulator has poor efficiency for heavy loads because a large amount of power is wasted in Zener diode resistance (R2) and series resistor (RS) in comparison with load power.
  • The output voltage of Zener regulator slightly changes due to Zener resistance
  • In Zener shut regulator changes in load current produce changes in Zener current. As a result, the output voltage also changes.

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