ZENER-DIODE

When a Zener diode is in reverse bias condition:

 

- It allows a small leakage current to flow initially.

- As the reverse voltage increases, the diode breaks down at a specific voltage, known as the Zener voltage (Vz).

- The diode starts conducting heavily, regulating the voltage across it to the Zener voltage.

- This breakdown is non-destructive if the current is limited, making Zener diodes useful for voltage regulation and protection.

 

Key characteristics:

 

- Zener voltage (Vz): The voltage at which breakdown occurs.

- Zener current (Iz): The current flowing through the diode during breakdown.

- Zener impedance (Zz): The dynamic resistance of the diode in breakdown.

 

Zener diodes are designed to operate in this reverse bias breakdown region, providing a stable reference voltage.