CDLL4105

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CDLL4105 Application Field and Working Principle

CDLL4105 is a type of Zener diode offered by Diodes Inc. It is designed for applications such as voltage reference, voltage regulator and reverse voltage protection. This diode is also known as a “Single” as it contains a single p-n junction structure.

Applications

CDLL4105\'s forward voltage drop is very low compared to traditional Zener diodes and features a typical Zener voltage range of 14.0V-16.2V. It also features a low leakage current of 1 uA which is ideal for applications that require low power consumption. Due to these features, the diode is recommended for use in power supplies, AC-DC converters, switching regulators and DC-DC converters to provide voltage regulation and protection against transients.

CDLL4105 is also widely used in automotive, industrial and battery-operated applications due to its wide operating temperature range that can reach up to 150 °C. Other automotive applications for the diode include reverse load protection, battery charge monitoring and over-voltage protection.

Structure and Working Principle

CDLL4105 is built from a single piece of semiconductor material such as silicon or germanium with two layers of doping. The doping layers, or “terminations”, function as the anode and cathode. When a reverse voltage is applied to the diode, a current starts to flow, known as the Zener current, which is the result of the electric field created by the higher voltage.

The structure of the CDLL4105 consists of a neutral region and a reverse conductive region. This reverse conductive region is known as the depletion region where mobile charges such as electron-hole pairs get swept away. This has the effect of reducing the built-in potential barrier, allowing the Zener current to flow.

The Zener current is maintained as long as the applied voltage remains the same or the voltage is increased. When the applied voltage is decreased below the Zener voltage, the Zener current stops flowing due to the build up of the depletion region. This makes the CDLL4105 ideal for applications such as voltage reference, voltage regulator and reverse voltage protection.

Conclusion

The CDLL4105 is a widely used Zener diode offered by Diodes Inc. It is designed for applications such as power supplies, AC-DC converters, switching regulators and DC-DC converters to provide voltage regulation and protection against transients. The diode is also known as a “Single” as it contains a single p-n junction structure. It features a low forward voltage drop, low leakage current and wide operating temperature range making it an ideal solution for automotive, industrial and battery-operated applications.

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