2EZ91D2/TR12

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2EZ91D2/TR12 Application Field and Working Principle

Category: Diodes - Zener - Single

The 2EZ91D2/TR12 is a type of Zener diode, which is a form of semiconductor diode generally used for voltage regulation and to protect circuits from overvoltage. It is an easy-to-use, low-cost component, with various technological applications. This article will discuss its application field and working principle.

Application Field

The 2EZ91D2/TR12 Zener diode can be used in numerous scenarios due to its superior performance and low cost. It is suitable for rectifying, switching, voltage regulation and protection, especially in the fields of consumer electronics, LED lighting, mobile phone, telecommunications and automotive. The 2EZ91D2/TR12 is a component of choice for many electrical engineers and hobbyists for its ease of use.

Working Principle

A Zener diode is a type of semiconductor component, made from a P-N junction diode which allows a pre-defined reverse current to flow freely. When the diode is reverse biased, due to the electric fields generated, the electrons are allowed to recombine and they emit light. As a result of this, a current is set up, proportional to the applied voltage. This is referred to as the Zener breakdown voltage. To determine the breakdown voltage of a diode, a graph of the diode’s current-voltage characteristic is usually drawn.

The 2EZ91D2/TR12 Zener diode works on an identical principle as other Zener diodes, with the most important factor being the Zener voltage. The Zener voltage is the point where the electric field in the P-N junction overcomes its ability to resist the applied voltage, and thus allowing a surge of electrons to be emitted. According to the data sheet, the 2EZ91D2/TR12 has a Zener voltage of 6.2V. This means that when a voltage of 6.2V is applied to the diode, the diode will start to operate at its maximum current.

When a Zener diode is connected in parallel with a load, it acts as a voltage regulator. As the applied voltage increases, the Zener starts to conduct current, thus reducing the voltage across the load. Due to this, the Zener keeps the voltage across the load constant, resulting in a much more stable output.

The 2EZ91D2/TR12 is also frequently used in protection circuits. It prevents any overvoltages from reaching the connected components, while allowing the required voltages to pass without any disruption. The Zener can also be used in various switching circuits, as the voltage at which the Zener starts conducting provides a reference point. Thus, by using a Zener diode in these kind of circuits, the current passing through can be easily maintained.

To conclude, the 2EZ91D2/TR12 Zener diode is an easy-to-use, low-cost component which offers superior performance. Its main applications include voltage regulation, protection from overvoltage, rectification and switching.

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