Zener diodes regulate voltage by allowing reverse breakdown current, ensuring a stable output for voltage regulation in various applications.
What is zener diode and how it works?
A Zener diode is a type of semiconductor diode that is designed to operate in the reverse breakdown region . It is similar to a standard diode but with a unique ability to maintain a stable, specified reverse voltage when a reverse bias is applied. Unlike regular diodes, which block current flow in the reverse direction, Zener diodes are made to conduct when the reverse voltage exceeds a specific threshold known as the Zener voltage (Vz). This makes Zener diodes ideal for voltage regulation applications. How a Zener Diode Works A Zener diode behaves like a regular PN junction diode when it is forward biased (anode connected to the positive terminal, and cathode to the negative terminal). In this configuration, it allows current to flow just like any normal diode. However, when it is reverse biased (anode connected to the negative terminal), it blocks current flow until the reverse voltage reaches a certain point. Once the reverse voltage exceeds the Zener voltage (Vz), the diode enters a …
About the author
Prasun Barua is a graduate engineer in Electrical and Electronic Engineering with a passion for simplifying complex technical concepts for learners and professionals alike. He has authored numerous highly regarded books covering a wide range of elec…
