Contents
What happens to zener diode after the breakdown voltage is exceeded?
This is important because once the voltage across a Zener diode exceeds its breakdown voltage, the voltage across the Zener remains constant. This means that even if the current going through the diode continues to increase, the voltage remains the same.
Why Zener diode are not damaged after breakdown?
What is Zener Breakdown? The Zener breakdown mainly occurs because of a high electric field. When the high electric-field is applied across the PN junction diode, then the electrons start flowing across the PN-junction. Therefore, the flow of current in the diode is incomplete the diode will not damage the PN-junction.
How to choose the correct Zener diode voltage?
The next important part is to select the Zener diode value. The below points will help you in selecting the right value and part number for the Zener diode. 1. First, choose the Zener diode voltage. It is the voltage value where the Zener diode will act as a close circuit and protect the load from overvoltage.
Which is the best diode for over voltage protection?
A very common and cost-effective solution is to use a Zener Diode Over Voltage Protection Circuit. Zener Diodes – Basics Zener diodes are mostly the first choice to protect the circuit from an overvoltage condition. A Zener diode follows the same principle of the diode, which is blocking the flow of current in the reverse direction.
What should the Zener voltage be for PSpice?
For the above example in Pspice, the Zener voltage is 6.8V. There will be some situations where the targeted Zener diode voltage is not available. In such cases, a close value of the Zener diode can be chosen. For example, for overvoltage protection up to 7V, a 6.8V Zener diode is a close value.
Which is the best resistor for OVP protection?
Standard value 100R resistor can be chosen. OVP protection using Zener diodes is the easiest and simple process to protect devices from overvoltage. In this technique, the voltage remains regulated and the cost of this circuit is very less when compared with other methods.