2EZ190DE3/TR8

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Single Zener diodes, like the 2EZ190DE3/TR8, are are especially designed to operate in reverse breakdown. While a regular diode is designed to operate as a conductor and not allow any current flow when reverse biased, a Zener diode is designed to regulate and limit the small reverse voltage applied to it regardless of the current. That is why it is used as an electronic building block in many various applications.

Application Field and Working Principle

The 2EZ190DE3/TR8 is a medium power Zener diode with a relatively low breakown voltage of 5.4V and a rated power dissipation of 500mW. It is manufactured to operate in high frequency switches, voltage regulators, and temperature sensing. The majority of its applications utilize reverse breakdown to minimize the voltage or control current across it, as it is capable of regulating and limiting voltages up to its breakdown voltage of 5.4V.

To understand the mechanics behind this voltage limiter, we have to take a look at the Zener diode\'s structure. In contrast to a regular diode, a Zener diode consists of a heavily doped p-type semiconductor and lightly doped n-type semiconductor layer.

Once the voltage reaches the breakdown level, a high electric field is formed across the junction. This strong field forces electrons from the valence band of the n-type into the conduction band, effectively allowing current to flow from the n- to the p-side, resulting in a regulated voltage drop.

Common applications for 2EZ190DE3/TR8 include the stabilizing of electrical noise and power surges, voltage regulation of AC to DC converters, voltage references, and as part of a voltage multiplier circuit. Additionally, due to its low breakdown voltage and high power handling capabilities, it is perfect for use in temperature sensors and low voltage rectification.

Conclusion

In conclusion, the 2EZ190DE3/TR8 Zener diode is designed to operate in reverse breakdown and its artificial junction can be used to regulate and limit voltages. It is suitable for a wide range of applications, such as stabilizing electrical noise, power surges, voltage references, rectification, and voltage regulation of AC to DC converters, to mention a few.

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