SP723ABTG Circuit Protection

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TVS (transient voltage suppressors) are widely used in various industries for protection against transient overvoltages. The SP723ABTG, one of the most popular TVS chips, is a mixed technology device incorporating both monolithic and polymer dielectric technologies to provide improved protection from over-voltage transients. It is designed for use in low input voltage applications such as communication, computing, automotive, and consumer electronic systems.

The SP723ABTG is a low capacitance, unidirectional device which provides an exceptional level of protection from transient overvoltages. It features dual voltage threshold capability that limits the total on-board voltage rise to a user-controlled level. This eliminates any overshoots or oscillations during transient overvoltage events, thus ensuring reliable system protection.

At the heart of the SP723ABTG is its monolithic structure. The device is composed of porous polysilicon with a dielectric layer that acts as an electrical insulator to prevent electrical currents from passing through it. This dielectric layer also serves as a threshold switch that activates once an overvoltage event occurs. The monolithic dielectric layer is sandwiched between two layers of silicon dioxide, which act as a gate in order to limit the voltage level allowed to pass through it. As a result, only a predetermined amount of voltage can pass through to the protected device.

The SP723ABTG also incorporates polymer dielectrics, which provide superior protection from extremely high voltage transients. Its polymer dielectrics offer an additional layer of protection, which can be activated in the event of a large transient voltage surge. The polymer dielectrics act as a cushion between the monolithic and porous polysilicon layers, thus providing a buffer zone which effectively reduces the voltage seen by the protected device.

In terms of the working principle of the SP723ABTG, the device is designed to provide effective protection from possible transient overvoltages by regulating the input voltage to a predetermined level. It is constantly connected to the protected device, allowing it to detect any transient overvoltages that arise. Once it senses an overvoltage, it triggers its monolithic dielectric layer, activating a voltage clamping action which conducts the extra voltage away from the protected device. The polymer dielectrics then provide additional protection from large transient voltage surges.

Overall, the SP723ABTG provides an ideal solution for applications which require reliable protection against transient overvoltages. The device\'s monolithic and polymer dielectric design ensures effective protection for the equipment against transients and ESD, while its low capacitance makes it suitable for use in low input voltage applications. Its dual voltage threshold capability further prevents any overshoots or oscillations during transient events, ensuring the highest quality of protection.

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