3EZ190D2/TR8 Discrete Semiconductor Products

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Diodes - Zener - Single

3EZ190D2/TR8 Zener diode is a voltage regulating diode that finds many applications. It is designed to regulate a specific reverse breakdown voltage. The diode is made to operate in the breakdown region but not in the normal diode operation region without any external resistor or zener network.

Application Field

3EZ190D2/TR8 Zener diodes are mainly used for voltage regulation. Their primary application includes regulating electrical current in power supplies, radio receivers, and voltage references.

3EZ190D2/TR8 Zener diodes are applicable in many fields. For instance, they are used as a voltage reference in battery-powered devices such as phones, computers, and tablets. They are used in digital circuits such as logic drivers, memory circuits, and logic gates. In analog circuits, they are used to regulate voltage levels in amplifier circuits and to protect sensitive components from electrical over-stimulation.

3EZ190D2/TR8 Zener diodes are also used in automobile circuit for overvoltage protection, in portable radios for radiosensitivity adjustment, in light mains as well as in energy transformers. They are also used in RF amplifiers, differential amplifiers and phase detectors.

Working Principle

A Zener diode is a specially designed diode that works in the reverse breakdown region. A normal diode would be destroyed due to excessive current if the reverse voltage applied to it exceeds the breakdown value. However, a Zener diode is designed to withstand reverse voltage up to a certain value.

When the specified breakdown voltage, known as the Zener voltage, is applied to the diode, a current begins to flow in reverse direction. During this process, a very small voltage drop is maintained across the diode and the output voltage will be almost the same as the Zener voltage.

The Zener voltage is determined by the doping level of the junction and the thickness of the depletion layer. As the reverse voltage applied to a 3EZ190D2/TR8 diode increases, the breakdown current increases. This current can flow in either direction and the diode will act as a voltage regulator. The diode will draw only enough current necessary to maintain the zener voltage and therefore, the current is controlled automatically.

Summary

3EZ190D2/TR8 Zener diode is one of the most commonly used voltage regulating diodes. Its primary application is to regulate the electrical current in many electronic devices. The Zener voltage determines the breakdown voltage of the diode and the current is controlled automatically when a voltage above the breakdown value is applied.

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