DDZ9717-7

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Diodes - Zeners Single - DDZ9717-7

A single Zener diode refers to a voltage regulator device that comprises one PN junction that limits the voltage in a single direction. Single Zener diodes are widely used in various applications, and among them, DDZ9717-7 is a widely used one. This article will discuss the DDZ9717-7 application field and working principle.

Application Field

DDZ9717-7 is an ideal diode for automotive, industrial and commercial applications. It can be used in several applications, such as in circuit protection, industrial and automotive AC/DC and DC/DC converters, high-end power supplies and other switching DC/DC converters. It is also used in relay control and PFC applications. Furthermore, DDZ9717-7 is a useful component for other battery- operated devices, from cell phone to tablet and laptop chargers.

Working Principle

A Zener diode functions as a breakdown diode that has a direct relationship between its reverse-biased voltage conduction and a specified breakdown voltage. The breakdown voltage of the diode is determined by the temperature coefficient of junction voltage or “knee voltage” Vz, which essentially specifies how the breakdown voltage changes with temperature over a temperature range. In short, DDZ9717-7 is able to block voltages that are in the same direction as the reverse-biased voltage and allow voltages in the opposite direction with a breakdown reaction that is induced when the diode reaches the breakdown voltage. This voltage can be controlled by adding a resistor in series with the diode. As a result, the resulting voltage regulator circuit can limit the voltage in a single direction.

The Zener EFFection of reverse breakdown current is because of the junction\'s depletion region and its ability to restrict the flow of electrons. The depletion region\'s strength depends on the junction\'s composition, which is determined by specific doping of the semiconductor material used for the diode. The reverse breakdown current starts to increase as the depletion region’s strength reduces when the voltage reaches Vz. After the voltage increase is initiated, the depletion region’s strength quickly decreases, allowing the reverse breakdown current to flow.

Moreover, DDZ9717-7 has a relatively high temperature operating range and thermal design power rating. It also has an optimized ESD protection. When a circuit experiencing ESD voltage is connected to the diode, it conducts the current away from the high voltages created by the ESD, ensuring that the device\'s operation is not affected by the ESD.

In short, DDZ9717-7 is a widely used single Zener diode that is used in various automotive, industrial and commercial applications. It has an optimized ESD protection and a relatively high temperature operating range and thermal design power rating. Through understanding the working principle of this diode, engineers can relatively easily determine how it can be used in their circuit designs.

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