AQ05-01FTG

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AQ05-01FTG is a component from TVS - Diodes which is widely used for ESD (Electrostatic Discharge) protection. It is a combination of an avalanche diode, bipolar transistor, and resistor. The device has a breakdown voltage of 5.5V, with a holding voltage of 4.2V and 1.2A ESD protection.

The structure of AQ05-01FTG is based on a bi-directional three-terminal device. When the device is exposed to ESD, the resistor and diode connected in parallel time-divide the wavefront of the ESD current. The diode series is designed to cause an avalanche breakdown when exposed to the applied voltage. The bipolar transistor is then activated, providing a low-resistance path so the charges of the ESD pulse can be discharged. This structure provides excellent transient protection for the device.

The working principle of the AQ05-01FTG can be divided into three stages. In the first stage, the ESD pulse is passed through the parallel resistor-diode network, and the voltage is distributed over the two components. The diode then suffers an avalanche breakdown, triggering the transistor to become activated. In the second stage, the ESD would be dissipated by the transistor. The transistor forms a low-resistance path which allows the ESD charges to be discharged. Finally, in the third stage, the voltage across the resistor would be clamped to the breakdown voltage of the device.

The AQ05-01FTG is used in a wide variety of applications. It can be used in portable electronic devices, such as PDAs, digital cameras, and USB flash drives, to provide ESD protection. It can also be used in automotive applications, such as airbags, instrument clusters, and engine control units, to provide transient protection. Moreover, it can be used in LCD TVs, printers, projectors, and personal computers in order to protect against power surges.

In conclusion, the AQ05-01FTG is a component from TVS - Diodes that can be used to provide ESD protection in a wide variety of applications. It features a breakdown voltage of 5.5V, with a holding voltage of 4.2V and 1.2A ESD protection. Its working principle is based on a three-stage process, which employs a bi-directional three-terminal device for the purpose of dissipating the ESD pulse.

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