2EZ51DE3/TR12

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Diodes are commonly used components in the electrical engineering circuit system, and the Zener diode is an important form of diode application. Among them, a single type Zener diode, 2EZ51DE3/TR12, should be mentioned. This diode is a three-terminal single-junction Zener diode composed of AIGaAs or SIC substrate, and its main application fields and working principles will be discussed in this article.

As a widely used component, 2EZ51DE3/TR12 widely applied to the fields of digital circuit protection, such as circuit design of power adapters, DC/DC converters, cell phone battery-backup circuits, monitoring circuits, etc. The Zener diode provides a buffering voltage reference for the circuit through the Zener voltage breakdown phenomenon.

The principle of a Zener diode is similar to that of an ordinary diode, but a Zener diode has a heavily doped pN junction, which can maintain a certain reverse breakdown voltage. So, when the reverse voltage of the junction exceeds a certain value, the electric field on the junction will increase rapidly and accelerate the depletion layer, resulting in a nonlinear voltage-current response, that is the Zener voltage breakdown phenomenon. The Zener diode under the reverse bias condition can maintain a constant breakdown voltage. The Zener voltage of the 2EZ51DE3/TR12 diode is 12V, which can provide a constant buffering voltage reference for the circuit.

In addition to providing constant buffering voltage, 2EZ51DE3/TR12 can protect the circuit from voltage spikes. When the input voltage exceeds the clamping voltage, the diode enters the conductive state and the thunder enters the forward voltage drop of the diode, reducing the voltage of the circuit and avoiding the damage of the circuit caused by excessive input voltage. Thus, the 2EZ51DE3/TR12 can provide current and voltage protection for the circuit when it is connected in reverse parallel with the circuit.

In summary, the 2EZ51DE3/TR12 is a single type Zener diode, which can provide constant buffering voltage and voltage spike protection for power adapters, DC/DC converters, cell phone battery-backup circuits and monitoring circuits. The Zener diode release the electric filed of the junction when the reverse voltage of the junction exceeds a certain value, which results in a nonlinear voltage-current response, that is the Zener voltage breakdown phenomenon. Therefore, it can protect the circuit from high voltage damage and maintain a constant buffering voltage reference.

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