Voltage Regulator Circuit With Zener Diode

A zener diode or breakdown diode.

Voltage regulator circuit with zener diode. This semiconductor is manufactured in a wide variety of voltages and powers. If it s a negative voltage then load voltage is it positive or negative. Zener diode is a general purpose diode which behaves like a normal diode when forward biased. By studying these concepts you will be able to explain zener diode as a voltage regulator in a better way and solve exercise questions.

To have a detailed understanding of zener diode and its working you should also read up on the related concepts. For a simple voltage regulation in the circuit or design zerner diode is the cost effective solution. The value of the series resistor is written as rs vl vz il current through the diode increases when the voltage across the diode tends to increase which results in the voltage drop across the resistor. Zener diode voltage regulator circuit.

This zener diode voltage regulator circuit uses a zener diode to establish a reference voltage. Draw the zener diode voltage regulator circuit diagram. Some zener diodes have a sharp highly doped p n junction with a low zener voltage in which case the reverse conduction. The voltage flowing in the zener diode of a regulator circuit is a negative voltage or that its electrons flowing.

But when it is reverse biased above a certain voltage known as zener breakdown voltage or zener voltage or avalanche point or zener knee voltage the voltage remains constant for a wide range of current. Zener diodes are manufactured with a great variety of zener voltages and some are even variable. The circuit diagram of a voltage regulator using a zener diode is shown. Refer to the voltage reference circuit to set the resistance r 1.

Design for an op amp voltage regulator circuit to drive a load of 6v 1 2w from an input supply of 12v with a 2v ripple voltage using a 3v zener diode. A typical zener diode for general electronic circuits is the 500mw bzx55 series or the larger 1 3w bzx85 series were the zener voltage is given as for example c7v5 for a 7 5v diode giving a diode reference number of bzx55c7v5. Simple zener diode voltage regulator circuit designed to give 5 volt output from 9 volt input you can replace the zener diode to get desired output voltage. Clarence zener is the scientist who discovered this electrical property and the device is named.

A zener diode is a special type of diode designed to reliably allow current to flow backwards when a certain set reverse voltage known as the zener voltage is reached.