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TVS - Diodes

A transient voltage suppressor diode, widely known as TVS diode, is a component that can provide protection against high voltage surges or transients, voltage spikes, and electrostatic discharges (ESDs). It is commonly used in various electrical and electronic systems, including telecommunications, automotive, and computerized control systems. A typical application of such a component is the SMBJ17A-13.

The SMBJ17A-13 is an ultra-low-capacitance, bidirectional dual diode designed to provide protection from high voltage transients, electrostatic discharge, and voltage spikes. It is a surface mount diode in two clamshell packages. It can be used in a variety of applications from consumer equipment and automotive applications to industrial models and embedded systems.

The working principle of the SMBJ17A-13 is based on the PN junction diode. It functions as an alternating-current voltage regulator, preventing the input voltage from exceeding the reverse breakover voltage. This is done by increasing its impedance when the input voltage exceeds the breakover voltage level. This high impedance maintains the output voltage at a safe level, thereby preventing damage to the circuit.

The SMBJ17A-13 has several features that make it an ideal choice for transient voltage suppression. One is its low capacitance, which reduces the effects of parasitic capacitance on the output voltage. Another is its high ESD tolerance, which makes it suitable for use in harsh environments. Finally, the device is bidirectional, meaning it can be used to protect against both positive and negative voltage surges.

In addition to being used in transient voltage suppression, the SMBJ17A-13 can also be used in ESD protection applications. It functions as an ESD protection diode by maintaining a low capacitance between the I/O pins, which helps to reduce ESD stress. Furthermore, due to its high ESD tolerance, the SMBJ17A-13 has the capability to withstand up to 8KV of peak surge energy.

To further enhance the performance of the SMBJ17A-13, it is recommended that the device be used in combination with external components such as capacitors and inductors. These components help to absorb or divert the peak surge energy, thus protecting the underlying circuit from voltage damage. Additionally, a good grounding system is also recommended for optimal performance.

The SMBJ17A-13 is a useful component for protecting electronic systems from high voltage transients, electrostatic discharge, and voltage spikes. Its low capacitance, high ESD tolerance, and bidirectional operation make it suitable for a wide range of applications. When used in conjunction with other external components, such as capacitors and inductors, this device can provide reliable protection against voltage surges.

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