NUP2115LT3G Circuit Protection

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TVS (transient voltage suppressor) diodes are used to protect sensitive electronic components from voltage spikes or other electrical transients. The NUP2115LT3G is one example of such a device. It is a high-voltage, low-capacitance three-terminal transient voltage suppressor diode designed for protection against electrostatic discharge (ESD). The three terminals are the anode (A), the cathode (C) and the guardline (G).

The NUP2115LT3G can be used for the protection of devices with sensitive circuits against high-energy ESD events, as defined by IEC 61000-4-2, such as computers, mobile phones, and other consumer electronics. It is designed for 8 kV contact-discharge performance and 15 kV air-discharge performance, with maximum clamping voltage of 43 V and maximum surge handling capability of 100 A per pulse.

The working principle of the NUP2115LT3G is based on avalanche breakdown, which occurs when a large electric field between the anode and the cathode (or guardline) causes the electrons in the depletion region to gain enough energy to create electron-hole pairs which, in turn, cause a rapid decrease in voltage across the device. This process, referred to as ‘avalanche’, reduces the applied voltage to the clamping voltage of the diode. This clamping voltage is determined by the breakdown voltage of the junction, the ionisation coefficient of the diode, the junction capacitance, and the load currents.

The NUP2115LT3G is packaged in an SOP-8 surface mount package and is available in a range of operating temperatures from -40°C to +85°C. It has a maximum dissipation of 200mW and a maximum reservoir capacitance of 1pF, making it suitable for high-frequency applications. Its low-capacitance design also ensures that it does not introduce significant loading on the device being protected.

In summary, the NUP2115LT3G is a three-terminal transient voltage suppressor diode designed for use in protection of devices against ESD. It features an avalanche breakdown mechanism, a low-capacitance design, and an SOP-8 form factor, making it ideal for high-frequency applications in consumer electronics.

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