12v Over Voltage Protection Circuit

The need for over voltage protection is particularly common in automotive 12v and 24v systems where peak load dump transients can be as high as 60v.

12v over voltage protection circuit. The over voltage protection circuit for automotive load dump shown in figure 1 is a perfect series disconnect or series cut of circuit which has been built to safeguard a switching regulator load that possessed an optimum input voltage of 24v. In our previous protection circuit tutorials we have designed many basic protection circuits that can be adapted into your circuit namely over voltage protection short circuit protection reverse polarity protection etc. Transient or persistent over voltage conditions that exceed an ic s absolute maximum voltage rating will permanently damage a device. Over and under voltage protection circuit diagram and will be output voltage of 9 5 volts.

Over voltage protection circuit using zener diodes every circuit design operates at different voltage levels the most common voltage levels for a digital circuit are 3 3v 5v and 12v. This is a basic circuit based upon dual comparator ic. The circuit needs 2 input. When the voltage is less than the preset level the base terminal of the q2 is high and as it is a pnp transistor it turns off.

But every design is unique and it is also common for a circuit to have more than one operating voltage. Short circuit protection reverse polarity protection and over under voltage protection are some of the protection circuits that are used to protect any electronic appliance or circuit from any sudden mishappenings. This variable voltage senses the voltage whether it is high or low. Protection circuits are vital for any electronic design to be successful.

Generally fuse or mcb is used for overvoltage protection however in this project our aim is to make a circuit which can perform better than a fuse or mcb and overcome the. Adding to this list of circuits in this article we will learn how to design and build a simple. And when q2 is in off condition the base terminal of q1 will be low and it allows the current to flow through it. And another is a variable sense voltage.

When voltage drop down to 180 volts this voltage as above will entered to diode rectifiers d1 d4. In this project we will build a simple yet effective overvoltage protection circuit using a fuse and a zener diode as the protecting elements that will work for electronics that. One is a constant 12v input for running the circuit. We use primary coil transformer is 380 volts to protect them not damaged by too over voltage.

An overvoltage protection circuit is a circuit which protects electronics from excess voltage which could potentially damage or destroy electronic components.