CMOZ11V TR Discrete Semiconductor Products

Diodes - Zener - Single

CMOZ11V TR is a zener type single diode with a peak repetitive reverse voltage (VRRM) of 11V and a peak repetitive non-repudiative average forward current (IFM) of 200mA. Typical applications of CMOZ11V TR includes surge protection, temperature sensing, voltage splitting and series regulation. This article will explain the application fields and working principle of the CMOZ11V TR zener diode.

Application Fields

The CMOZ11V TR zener diode is used for applications such as the protection of electronic circuits from undesired overvoltage stress, voltage splitting, voltage regulation and temperature sensing.

Firstly, CMOZ11V TR is compatible with many overvoltage protection application thanks to its low on-resistance and high peak current capability. Its VRRM voltage is designed to protect the circuit from transient overvoltages, allowing the device to clamp voltage fluctuations directly within itself. This allows the device to remove excess stress from the circuit, protecting it from breakdown.

Furthermore, the CMOZ11V TR can be used for voltage splitting, due to its high reverse breakdown voltage. This means that it can be used to create two separate circuit nodes with different voltages. This can be done by connecting two components to each other in series, with the zener diode in between them. This means that the zener diode will present two separate circuits with different voltages, one at its breakdown voltage, and the other at the desired voltage.

Additionally, the CMOZ11V TR can be used for series regulation. By connecting this zener diode to a higher voltage AC source, it will be able to clamp the voltage to a certain level allowing the user to receive a more stable and reliable power supply. With its high peak current capability and low on-resistance, the CMOZ11V TR will be able to protect downstream components from voltage spikes. Finally, this diode can be used for temperature sensing, thanks to its negative temperature coefficient. This will allow the device to be able to measure temperature variations in a circuit and convert them into a readable voltage signal.

Working Principle

The CMOZ11V TR Sode is a Zener diode, which can be easily identified by its bi-directional characteristics. This is because this type of diode allows current to flow through it in either polarity while also regulating the current to a certain voltage. This is done using a method known as Avalanche Breakdown.

Avalanche Breakdown is a phenomenon that occurs due to electric field in a reverse biased diode which increases the acceleration and kinetic energy of the carriers of charge, until it reaches a critical value. When this limit is reached, carriers are able to create an avalanche of electrons and holes that more easily breaks the barrier, allowing current to flow through the diode even if it is reverse biased. This current is limited to a certain value, this being the zener voltage, which is directly proportional to the reverse biased voltage present on the diode. This voltage is typically chosen when designing the diode, and it can range from a few volts to several hundred. With the CMOZ11V TR, this value is 11V.

With this method, the diode can clamp a certain voltage on its reverse bias range, allowing it to be used for voltage regulation. Furthermore, the temperature coefficient of the zener voltage is also negative, meaning that its zener voltage decreases as the temperature increases. This makes it ideal for temperature sensing applications.

Conclusion

The CMOZ11V TR is a single diode with a peak repetitive reverse voltage (VRRM) of 11V and a peak repetitive non-repudiative average forward current (IFM) of 200mA. This makes it ideal for applications such as surge protection, voltage splitting, temperature sensing and series regulation. The diode achieves this through its usage of Avalanche Breakdown, a phenomenon that occurs due to electric field in a reverse biased diode which allows current to flow through it even when it is reverse biased, limited to its zener voltage, 11V in this case.