DDZ9689T-7

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Diodes - Zener - Single are commonly used in power supplies or in current-regulating applications. DDZ9689T-7 is an exact example of this kind of power supply device. It is a single-cell zener diode designed specifically for high-efficiency and high-voltage power applications.

DDZ9689T-7 is suitable for applications such as integrated circuit power supplies, TV systems, telecommunications systems, lighting systems, motor drives and other power-related applications.

The DDZ9689T-7 device has a reverse voltage of 7.8 volts, together with an avalanche voltage of 38 volts and a reverse voltage standoff ratio of 5.0 volts. This stands for beyond the capability of other diodes type of the same reverse voltage. It also offers a higher forward voltage for applications that don’t require additional voltage drop before the device is reached.

Its thermal resistance junction-to-ambient is between 1.7K/W and 2.3K/W depending on the installation size of the device. This makes DDZ9689T-7 usable in a wide range of thermal environments. Moreover, it comes with a power dissipation ranging from 1.3 Watts and 6.5 Watts for a single-cell diodes.

When it comes to its physical characteristics, the connector type of the device is axial, with a package type of 6mm. Its height is 3.2mm overall, with an outer diameter of 6 mm and an inner diameter of 0.8mm. The device has a non-poled package with a weight of 0.19g, a total capacitance of 0.001 μF, and a thermal shock resistance of 110 °C.

The working principle of DDZ9689T-7 is based on the Poisson distribution. In this approach, a voltage is applied across the diode\'s junction. Upon reaching the avalanche voltage, electrons are injected into the diode\'s valence band, and this produces a narrow, localized conduction connection at the junction.

The carrier concentration then increases throughout the entire region, allowing an equal decrease in the reverse voltage across the device. The reverse current thresholds in DDZ9689T-7 will determine the peak current, which is typically equal to the maximum zener current.

The device is designed to produce an adjustable but constant reverse voltage as long as the applied forward current is below the maximum zener current. This function is particularly useful when used in protection circuit designs against over-voltage, current limiting of DC/DC converters, or in power-line fault protection.

In conclusion, DDZ9689T-7 is a single-cell Zener diode capable of serving a variety of power-related applications. It is designed to have a reverse voltage of 7.8V, an avalanche voltage of 38V, and a power dissipation rate of up to 6.5 Watts. The working principle of DDZ9689T-7 relies on the Poisson distribution, with carrier concentration increasing throughout the region to decrease the voltage across the device.

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