Why is TVS pipe called an "important means" of ESD protection?

Why is TVS DIODE called an "important means" of ESD protection?

In the application of electronic systems, transient interference of voltage and current will often cause damage to electronic equipment, and the significant feature of transient interference is that the action time is extremely short, but the voltage amplitude is high, the transient energy is large, so the damage is very large.

    In order to prevent this damage, TVS DIODE has been widely used, TVS DIODE is a kind of voltage regulator diode process based on the development of a high-efficiency circuit protection device, its circuit symbol and ordinary voltage regulator diode The same as the shape, the shape is no different from the ordinary diode, when the TVS diode at both ends of the instantaneous high energy impact, it can be at a very high speed (up to 1 * 10-12 seconds) to make its impedance suddenly reduced, while absorbing a large current,

    The voltage between its two ends is clamped to a predetermined value, thus ensuring that the circuit components behind it are not damaged by transient high-energy shocks.

    We can often see TVS DIODE as one of the main means of ESD protection in some precision electronic equipment.

    As a common denominator, they can be used to regulate voltages and both operate in reverse cut-off conditions. However, the Zener breakdown current of the TVS diode is smaller, and the voltage regulation greater than 10V is only 1mA, and the Zener diode breakdown current is relatively large, but the Zener diode regulation can be relatively high.

    Moreover, the TVS DIODE emphasizes transient response, so its time parameter is very important, which means that the response time of the regulator diode is usually slower than that of the TVS diode. At the same time, the power of the TVS DIODE is larger, while the power of the regulator diode is small.

    Secondly, from the conceptual understanding, the TVS DIODE is mainly to prevent the influence of instantaneous large voltage, and finally can achieve the purpose of voltage stabilization, which is different from the role of the voltage regulator diode.