CDLL3825

Series:	--
Packaging:	Bulk
Part Status:	Active
Voltage - Zener (Nom) (Vz):	4.7V
Tolerance:	±10%
Power - Max:	1W
Impedance (Max) (Zzt):	8 Ohms
Current - Reverse Leakage @ Vr:	5µA @ 1V
Voltage - Forward (Vf) (Max) @ If:	1.2V @ 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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Introduction to CDLL3825

CDLL3825 is a Zener Diode manufactured by Common Design Semiconductor, Inc. It is a single-sided, low voltage, high-temperature hard-solderable device that offers good thermal performance and reliable protection against electrical surges. It is comprised of a P-type silicon substrate with a metal-oxide layer.The CDLL3825 is ideal for applications where space limitations and electrical safety are of primary concern. Its low forward voltage drop and small reverse leakage current combine to make it an ideal choice for applications that require high isolation and protection from overvoltage conditions. It is well-suited for applications such as DC converters, automotive electronics, power converters, and surge protection.

Features of the CDLL3825

The CDLL3825 has a wide range of features that make it suitable for a variety of applications. It has a low Zener voltage of 3.2 volts (Vz), a low reverse leakage current of 50 microamperes (uA) at 1mA, and a forward voltage drop (Vf) of 1.2V. It also has a built-in thermal protection feature that prevents the device from being damaged due to excessive heat. Additionally, its low reverse voltage and low junction capacitance make it suitable for high-frequency, high-power applications as well.

Application Fields of CDLL3825

The CDLL3825 is primarily used for overvoltage protection and EMI filtering, as well as for providing isolation in high-speed, high-power switching applications. This device can be used in DC converters and power converters, as well as in buck converters and flyback converters. It is also an ideal choice for applications where high isolation and reliable protection is required, such as in automotive electronics, CCD cameras, and surge protection.

Working Principle of CDLL3825

The working principle of the CDLL3825 is based on the Zener voltage breakdown mechanism. When the applied reverse voltage exceeds the reverse breakdown voltage (Vr), the metal-oxide layer breaks down and conducts current, limiting the voltage to the specified Zener voltage (Vz). The forward voltage drop signified by Vf serves as a voltage source at the anode, thus allowing some current to flow through the device in the forward direction.The current regulating capability of the CDLL3825 also makes it ideal for applications where current needs to be regulated. The device operates such that the current is limited to a predetermined value when the reverse breakdown voltage Vr is exceeded. Since the current flow is dependent on the voltage applied to the device, it can be bounded to the required limit even if the voltage changes.

Conclusion

The CDLL3825 is a low-voltage, high-temperature, hard-solderable Zener diode from Common Design Semiconductor, Inc. Its combination of low forward voltage drop, low reverse leakage current, and built-in thermal protection makes it a great choice for applications that require high isolation and reliable protection against surges. It is primarily used for overvoltage protection and EMI filtering applications, as well as for providing isolation in switches. The device operates based on the Zener voltage breakdown mechanism, with the current regulating capability providing reliable protection against current surges.

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