AOZ8844DT

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TVS (Transient Voltage Suppression) diodes are an important type of semiconductor device, which are used to protect sensitive electronic circuits from high-voltage transients, no matter if they are originated from external interference signals or switchings in circuits. The AOZ8844DT is a Low Capacitance Ultra Low Clamping Transient Voltage Suppressor that fits this application filed. It offers high surge current capability up to 16A for 8×20μs and its typical maximum clamping voltage is 8.9V at Ipp=12A for 8×20μs.

The specific working principle of this AOZ8844DT is that it is designed to trigger at a certain minimum overvoltage level. It will quickly conduct a large current, then clamp a relatively constant voltage across the device, and finally return back to its non-conducting state. The solid-state device is able to endure high working voltages and currents due to its special design, which is capable to provide a rapid current flow that could instantly clamp the transient voltage to a level below what the protected circuit could handle. This is particularly helpful in case of extreme overvoltages which could damage or even destroy the protected electronic devices.

This typical AOZ8844DT TVS protects against electrostatic discharge (ESD) and multi-strike events, EMI, as well as power surge transients, and has UL and CSA recognition, as well as US and European acceptance levels. It is typically used in enhanced USB applications such as Enternet, broadband, and anywhere both the data and signal lines must be protected. It promises wide operating temperature range from −55 to 85˚C and highest peak pulse power dissipation of 500W.

The AOZ8844DT is configured in a single SOT-23 package, and its electrical parameters are designed for plug-and-play operation within a variety of systems with a wide range of overvoltages, from 36V to 60V at operating temperature. Its low thermal impedance junction-to-package helps to ensure its adequate performance in a range of environmental conditions, with high efficiency. The SOT-23 package of the AOZ8844DT provides an easy mounting solution and occupies less board space.

In conclusion, the AOZ8844DT is an important TVS with ultra low clamping and high surge current capability that can protect sensitive electronic circuits from high voltage transients, and it has been widely used in enhanced USB applications as well as wherever ESD events, EMI and power surge protection is required. Its electrical parameters are designed for plug-and-play operation, and with its SOT-23 surface mount packaging, it provides an easy mounting solution that occupies less board space. With different levels of compliance to safety measures and other considerations, it is expected to be more widely used in a greater variety of applications.

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