A Transient Voltage Suppressor (TVS) diode is a high-performance protection device in the form of a diode. When the two terminals of a TVS diode are subjected to a reverse transient high-energy surge, it can switch from a high-impedance state to a low-impedance state within picoseconds (10^-12 seconds). This rapid transition allows the TVS diode to absorb surge power up to several kilowatts, clamping the voltage between its terminals to a predetermined level. This effectively protects sensitive electronic components in the circuit from damage caused by various surge pulses.
Features of Transient Voltage Suppressor (TVS) Diodes
Protection Against Instantaneous Pulses:
When TVS diodes are added to signal and power lines, they can prevent microprocessors or microcontrollers from malfunctioning due to instantaneous pulses. These pulses can be caused by electrostatic discharge (ESD), AC power surges, and noise from switching power supplies.
Effective ESD Protection:
Electrostatic discharges can release pulses with voltages exceeding 10,000V and currents over 60A, lasting up to 10ms. In contrast, typical TTL devices can be damaged by a 10V pulse lasting more than 30ns. TVS diodes can effectively absorb these damaging pulses and eliminate crosstalk interference caused by switching between bus lines.
Noise Immunity:
Placing TVS diodes between signal lines and ground can protect data and control buses from unwanted noise. This ensures that the integrity of the signals is maintained, and the system remains stable and reliable.
Summary
Boarden’s TVS diodes provide robust and reliable protection against transient voltage surges, making them an essential component in many electronic circuits. By quickly clamping the voltage to a safe level, TVS diodes help to safeguard sensitive electronics from damage, ensuring the longevity and reliability of the overall system. Whether used in consumer electronics, industrial control systems, or communication equipment, TVS diodes play a crucial role in maintaining the performance and safety of electronic devices.
