What is Galvanic Isolation?


Galvanic isolation is a technique in electronics that uses insulation to completely separate one circuit from another. This method of separation is typically used in situations where equipment in a circuit could be damaged by the other electrical high voltage and current flowing through the system. It also allows two circuits, both using different voltage or current, to interact without interfering with each other directly.

The basic principle behind galvanic isolation is simple: by placing an insulator between two circuits, the voltage and current in one circuit will have no effect on the other. This is because the electric voltage and current are unable to pass through the insulation material.

How Galvanic Isolation Works?

There are a variety of ways to create galvanic isolation, but all of them rely on the same basic principle. By inserting an electrical insulator between two circuits, the current that flows through one circuit is unable to interact with the other. 

One simple way of isolating two systems is to use a transformer. 

A transformer is constructed by producing two coils of wire, each connected to its own power supply (the voltage of which can be different). When the two coils are placed close to each other, the voltage of coil 1 can induce a current in coil 2. The important thing is that this process does not create any sort of direct connection between coils 1 and 2. It simply causes a change in the amount of current passing through coil 2 relative to coil 1.

One such application that uses a transformer for galvanic isolation is a gate drive transformer. For example, in switching power supplies, gate drive transformers are used to deliver controlling pulses while isolating the high voltage power MOSFET from the controlling drive circuit.

Another way of providing galvanic isolation is to transmit signal using a optical channel. For example, this can be done by using an isolated gate drive optocoupler. Isolated gate drive optocouplers are used in order to prevent interference between one circuit and another. Isolation is widely used for regulating power supplies, telecommunications, medical devices, computers and many other applications.

Isolated Gate Drivers

An isolated gate drive sends electrical signals from a controller. It then sends the electrical signals to the transistor. This is important in order to prevent interference between the controller and the transistor. Isolation allows for a clean, interference-free signal to be sent from the controller to the transistor. 

Isolated gate drivers are widely used in order to improve the performance of circuits. They are also used in order to increase the safety of circuits. An isolated gate drive is used in a variety of applications, including power supplies, motor controllers and many others.


Galvanic isolation is often used in industrial and medical applications. It is used in medical applications to protect patients from harmful electrical noise. It is also used in industrial applications to prevent accidents from occurring. For example, if there was a power surge in a factory that manufactured delicate precision equipment, then the galvanic isolation could prevent this from ruining any of the equipment.

Galvanic isolation is also used to protect electrical components from large voltage transients. These types of transients are common and occur all over the world. They can be generated by lightning strikes and other natural events. Galvanic isolation protects the system from these transients by keeping them isolated from each other.

Galvanic isolation has many applications and is a very important technique used in electrical engineering. Engineers often have to choose which type of galvanic isolation they need to use, whether it be optical or magnetic. This choice depends on the type of equipment that is being isolated and the environment in which it will be used.