CDLL4112

Series:	--
Packaging:	Bulk
Part Status:	Active
Voltage - Zener (Nom) (Vz):	18V
Tolerance:	±5%
Power - Max:	500mW
Impedance (Max) (Zzt):	100 Ohms
Current - Reverse Leakage @ Vr:	50nA @ 13.7V
Voltage - Forward (Vf) (Max) @ If:	1.1V @ 200mA
Operating Temperature:	-65°C ~ 175°C
Mounting Type:	Surface Mount
Package / Case:	DO-213AB, MELF
Supplier Device Package:	DO-213AB

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CDLL4112 Application Field and Working Principle

Diodes - Zener - Single

The CDLL4112 is a Zener diode, which is a specific type of diode with a characteristic reverse breakdown voltage. It is a single-package device with a low forward voltage drop and a good temperature stability for use in multiple applications. Zener diodes have a broad range of uses in different industries. The most typical uses for the CDLL4112 are primarily in the power supply and voltage regulation industry, as well as in the sensing and protection industry.

Power Supply and Voltage Regulation Applications

The Zener diode is an important component in power supply and voltage regulation applications. It is used in both linear and switching-mode power supplies, as well as in regulated power supplies. The CDLL4112 can be used as a voltage reference, with its constant voltage and low current design. In linear power supplies, the component regulates voltage levels, while in switching-mode power supplies it serves as a “crowbar” protector, limiting and regulating the output voltage. In regulated power supplies, the component works to reduce the output current from the power supply to a predetermined value. The Zener diode can also be used to control and limit inrush currents in power supplies, as well as to control transient over-voltage spikes.

Sensing and Protection Applications

The CDLL4112 is also often used in sensing and protection applications. It can be used as a voltage comparator with its precise and temperature-stable characteristics. The component can provide protection during the process of heterodyne detection and signal suppression. Additionally, it can provide voltage protection and voltage sensing in both AC and DC circuits.

How The CDLL4112 Works

The CDLL4112, like all Zener diodes, works in a reverse-biasing arrangement. That is, the arrangement is such that the diode is reverse-biased, with the current flowing through the component in the reverse direction, from cathode to anode. A Zener diode is designed such that when the reverse voltage across it reaches a certain level (the Zener voltage), the voltage across it remains constant and the current increases. This behavior serves to limit the voltage across the component, which is what makes the CDLL4112 so suitable for its power supply, voltage regulation, and protection applications. In the CDLL4112, two SCRs are installed internally to protect the component from high surge currents. These SCRs are triggered when a high-current overload is applied to the component, limiting the current flow to a safe level and protecting the component from damage.In summary, the CDLL4112 is a Zener diode that is single-package device with a low forward voltage drop and a good temperature stability. It is primarily used in power supply and voltage regulation applications, as well as in sensing and protection applications. It works through a reverse-biasing design, with two internal SCRs to protect it from damage due to high surge currents.

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