V22CH8

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Transient voltage suppression (TVS) devices, such as varistors, metal-oxide varistors (MOVs), and TVS diodes, are essential for protecting electronics from voltage transients. The V22CH8 is a TVS diode that is specifically designed to protect power systems from voltage transients. It is designed to offer high transient surge levels and features 8 channels of protection. This article will discuss the application field and working principle of the V22CH8.

The V22CH8 is primarily used as an overvoltage protection device in automotive, industrial, medical, and solar applications. In automotive applications, the V22CH8 can be used to protect the onboard electronics from voltage spikes resulting from ECUs, immobilizers, radios, and electronic control modules. In industrial applications, the V22CH8 is often used to provide transient protection for motors, controllers, and other sensitive industrial equipment. Additionally, the V22CH8 can be used in medical applications to provide protection from voltage transients generated by medical equipment.

When an overvoltage event occurs, the V22CH8 is designed to dissipate the transient energy while safely protecting the downstream electronics. The V22CH8 is a zinc oxide (ZnO) TVS diode, meaning it consists of a metal plate with a ZnO layer connected to an electrode. When the applied voltage exceeds the peak operational voltage, the ZnO layer begins to conduct. This allows the transient current to flow through the ZnO layer, dissipating the energy.

The V22CH8 features 8 channels of protection, which provides additional protection from larger transient events. This is due to the fact that each channel can dissipate a larger amount of energy before they become saturated. Additionally, the V22CH8 features clamping voltage (VC) to ensure it can stop large transients. This is essentially the highest voltage the device can support before it fails. It is important to note that the VC is dependent on the device current and should be taken into consideration when using the device.

In addition to the 8 channels of protection, the V22CH8 also features dual suppression modes. The two modes are active and passive. In active mode, the device will continuously dissipate energy. This mode is primarily used in applications where there is a continuous presence of EMI. In passive mode, the device will only dissipate energy when a transient event exceeds the breakdown voltage of the device. This mode is commonly used in applications that only need transient protection, such as automotive electronics.

Overall, the V22CH8 is an ideal solution for providing transient protection. It features 8 channels of protection as well as dual suppression modes, making it capable of protecting against a wide range of voltage transients. Additionally, the device has a clamping voltage of 513V for most devices, allowing it to safely dissipate large transients and protect downstream electronics.

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