Characteristics and application fields of TVS transient suppression diode

Characteristics and application fields of TVS transient suppression diode

1. What is TVS

TVS stands for Transient Voltage Suppressor. TVS diode is a protective component used to protect electronic components from voltage transients. The working principle of TVS diodes is to have the properties of ordinary diodes within their forward working range. When the reverse voltage exceeds their rated reverse voltage, the voltage will rapidly increase, transforming the high impedance between the two poles into low impedance at a rate of 10 ^ -12 seconds, absorbing surge power of up to several kilowatts, and clamping the voltage between the two poles at a predetermined value, effectively protecting precision components in electronic circuits from damage caused by various surge pulses. When the overvoltage disappears, the TVS diode will automatically reset.

2. Characteristics of TVS

Fast response speed: The transient suppression diode has a very fast response speed and can respond to voltage changes in ns level time, thereby protecting the circuit from damage caused by transient voltage, electromagnetic interference, etc.

High reverse voltage: It can usually withstand voltages of several hundred volts, which can protect the circuit from damage caused by high voltage.

Effective suppression of transient voltage: Transient suppression diodes can effectively suppress transient voltage, preventing it from entering the protected circuit.

Small size and high power density: Transient suppression diodes are usually smaller in size and have higher power density than other protective components, providing effective protection in small devices.

Long lifespan: Transient suppression diodes have a long service life and can withstand multiple high-power transient voltage impacts without affecting their performance.

Environmental Protection: Compared with other protective components, transient suppression diodes have better environmental performance due to the absence of combustibles and the release of toxic gases.

In addition, it has the characteristics of high transient power, low leakage current, small breakdown voltage deviation, and easy control of clamping voltage.

In summary, TVS diodes have the advantages of fast response speed, small size, good protection effect, and high reliability, making them one of the ideal components for protecting electronic components.

3. TVS application areas

TVS transient suppression diodes can be widely used in the protection field of various electronic devices. The following are some common application areas:

1) Electronic device protection: TVS transient suppression diodes can be used to protect various electronic devices, such as televisions, computers, mobile phones, speakers, etc., from damage caused by transient voltage fluctuations.

2) Power line protection: TVS transient suppression diodes can be used to protect power lines from transient voltage, lightning, and other factors.

3) Communication network protection: TVS transient suppression diodes can be used to protect communication equipment such as switches, routers, etc. from electromagnetic interference and lightning.

4) Automotive electronic protection: TVS transient suppression diodes can be used to protect automotive electronic devices such as engine controllers, car audio systems, etc. from voltage surges, electromagnetic interference, and other factors.

5) In the aerospace field, TVS transient suppression diodes can be used to protect aerospace electronic equipment from electromagnetic interference damage.

In summary, TVS transient suppression diodes can be widely used in the protection field of various electronic devices. Their main function is to protect electronic devices from the effects of voltage surges, transient voltages, electromagnetic interference, and other factors.

How to choose packaging for TVS with the same power

When selecting the packaging size of TVS transient suppression diodes with the same power, the following factors should be considered:

Maximum pulse current: When selecting the packaging size, it is necessary to consider the maximum pulse current that the TVS transient suppression diode can withstand, and choose the appropriate size to ensure that it can withstand the required current.

Voltage level: The packaging size needs to be selected based on the reverse voltage that the TVS transient suppression diode needs to withstand.

Heat dissipation capability: When selecting packaging, it is also necessary to consider the issue of TVS transient suppression diode heat dissipation. If the ambient temperature is high or the required power is large, it is necessary to choose a package with good heat dissipation performance to ensure the stable operation of the TVS transient suppression diode.

Design space: Different package sizes correspond to different circuit board space requirements, which need to be selected according to the actual situation.

In summary, when selecting the packaging size of TVS transient suppression diodes with the same power, it is necessary to comprehensively consider factors such as maximum pulse current, voltage level, heat dissipation capacity, and circuit board design space.