Over Voltage Protection Circuit Power Supply

The over voltage protection circuit is based on brute force.

Over voltage protection circuit power supply.

With the zener diode voltage chosen to be slightly above the maximum rail voltage under normal conditions it will not conduct. The circuit has a few components it is very easy to build and will protect your electric equipment againg overvoltages. The crowbar circuit must be mounted between power supply and the protected device. In some situations where the input voltage is higher than expected we always use an overvoltage protection or crowbar protection circuit.

Overvoltage protection is a power supply features which cutoffs the supply whenever input voltage exceeds the preset value. Crowbar protection circuit is a type of overvoltage protection which is most commonly used in electronic circuits. Over voltage protection is a power supply feature which shuts down the supply or clamps the output when the voltage exceeds a preset level. In its simplest form it can be provided by using a zener diode placed across the output of the regulated power supply.

This is a sequel to our anatomy of switching power supplies tutorial and we are going to explore in depth all power supply protections like over voltage ovp under voltage uvp. When the power supply voltage increases too much a thyristor shortcircuit the output. Overvoltage protection is a characteristic of a power supply system which somehow deals with the voltage across the load side when the input voltage exceeds the pre set value.