824551111 Circuit Protection

TVS - Diodes

824551111 application field and working principle.

Introduction

TVS (Transient Voltage Suppression) diodes are non-linear protective devices that can provide electrical overstress protection in power supplies, control units, and telecommunications equipment. This type of diode acts like a traditional diode but is designed to protect sensitive electronic components from voltage spikes. When an electrical current spikes over a certain level, the TVS diode will conduct electricity and suppress the overvoltage, reducing the risk of component burnout or system failure.

Application Field

TVS diodes are most commonly used in automotive, consumer electronics, industrial, and telecommunications applications. They protect sensitive electronic components, including IC chips, from electrical overstress by diverting current away from sensitive components. This is done by quickly conducting and dissipating the current from the source to the ground.

TVS diodes are also used in telecommunications equipment, including cellular base stations and Ethernet routers. The diodes act as a surge protection device for sensitive equipment and can provide protection from lightning strikes. Additionally, they are used to protect computer networks from electromagnetic interference (EMI) and radio-frequency interference (RFI).

Working Principle

TVS diodes are designed to quickly switch from an off-state to an on-state when there is an increase in electrical current. When an over voltage occurs, the diode begins to quickly conduct electricity and redirect the current away from sensitive components. This allows the component to remain undamaged from the voltage spike.

When an overvoltage occurs, the electric field within the diode increases. This causes the diode to become more conductive and allows it to quickly redirect the current away from the source. The diode returns to the off-state when the overvoltage drops below the reverse breakdown voltage of the diode.

Conclusion

TVS diodes are essential for protecting sensitive electronic components from electrical overvoltage. They are widely used in automotive, consumer electronics, industrial, and telecommunications applications. The diodes are designed to quickly connect to the source and redirect the current away from sensitive components. This ensures that the component remains undamaged from electrical spikes and surges.