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TVS - Diodes Application Field And Working Principle

TVS - Diodes are widely used in many kinds of industries, such as engineering design, communication, and power applications. As they are electronic devices, they have different application fields and working principles. In this article, we will discuss in detail the application fields and working principles of TVS - Diodes.

Application Fields of TVS - Diodes

TVS - Diodes are primarily used as surge protectors in industrial, communication, and power applications. As they are voltage-dependent devices, they are generally used as the polarity-preserving rectifier of power supply, such as those used in AC/DC, DC/DC converters. Additionally, they are used as a circuit regulation element in peak voltage output clamping, voltage spike protection, EMI suppression, and Arc Suppression applications.

In addition, they are also widely used in data communication applications, especially in Ethernet, USB and serial interface devices, to help protect the devices from electrostatic discharges or voltage spikes affect the connection. They are also frequently used in automotive electronics and in many other industrial and consumer electronics.

Working Principle of TVS - Diodes

TVS - Diodes are voltage clamping devices that protect the circuit from voltage spikes. They are composed of semiconductor material and a PN junction. When the incoming voltage spike is below the Avalanche breakdown voltage, the diode will be forward biased and the circuit is uninterrupted, allowing the current to pass unimpeded. However, when the incoming voltage spike is above the Avalanche breakdown voltage, the diode will be in reverse bias, preventing current from flowing and protecting the circuit from the voltage spike.

When it comes to ESD protection, TVS - Diodes work differently than normal diodes. The TVS - Diode has a much lower threshold voltage, so when an ESD pulse is applied, it will appear to be significantly lower than the threshold voltage and the diode will switch into reverse bias, preventing the ESD pulse from entering the protected circuit.

Conclusion

TVS - Diodes are widely used in various industries due to their ability to protect a circuit from voltage spikes and ESD pulses. They work in a unique way, with the diode switching into reverse bias when a voltage spike is present above the avalanche breakdown voltage or an ESD pulse is applied. Hopefully, this article has provided a good overview of the application fields and working principles of TVS - Diodes.

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