ATV15C480JB-HF Circuit Protection

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The ATV15C480JB-HF is a device from the TVS - Diodes family developed by STMicroelectronics specifically to protect power and data lines from overvoltage. The high power ratings define it as an ideal component for the automotive market, although it can be found in various industrial and consumer applications given its fast response and wide range of working voltages. This article will focus on the ATV15C480JB-HF application fields and its working principle.

Application fields of the ATV15C480JB-HF

The ATV15C480JB-HF is an unidirectional breakover diode which is designed for use in low-voltage DC (direct current) applications such as automotive, industrial, consumer and telecom. It is especially suitable for protecting power lines, data lines, and other lines from transients and abrupt overvoltage. The device is highly resistant to electrostatic discharge (ESD) and short circuit current up to 3A, so it can be easily used for protecting (+) 12V lines as well as reverse power supply systems.

The ATV15C480JB-HF is most commonly used in automotive systems, for instance to protect ECUs in engine control systems, transponders, audio systems, airbag systems and immobilizers. It is also an ideal solution for telecom applications that require overvoltage protection for data signals, such as power lines, USB lines, etc. The device has an operating temperature of -55°C to +175°C, which makes it suitable for use in automotive and industrial applications that have extreme temperature requirements.

Working principles of the ATV15C480JB-HF

The ATV15C480JB-HF is a bidirectional bridge-connected diode. It is designed to provide protection against excessive voltage by clamping voltage across the device between the threshold voltage level and the maximum peak pulse current rating of the device. The threshold voltage level is defined as the voltage level at which the reverse current flows and is typically in the range of 8V. Beyond this voltage level, an avalanche breakdown occurs and the device begins to conduct, thereby dissipating the excess voltage. Once the avalanche current is reached, the device will reach its maximum breakdown voltage rating. This maximum breakdown voltage rating is typically at 600V for the ATV15C480JB-HF.

The device is also designed to limit the current to a safe level that is below the peak pulse current rating of the device. It does this by shunting away the excess current, which is why it is able to protect the circuit from short-circuits and over-currents. Furthermore, the device has an integrated circuits diode layer, which helps to protect data lines from ESD surges.

The ATV15C480JB-HF also has a very fast response rate of only 6 nanoseconds, which helps to limit the overvoltage damage that can be caused by the transients on the power line. By providing this fast response time the device is able to effectively protect any type of circuit connected to it, allowing it to be used in a wide range of applications.

Conclusion

The ATV15C480JB-HF is a device from STMicroelectronics’ TVS - Diodes family. It is designed to protect power and data lines from overvoltage, ESD surges and short circuit currents. The device can be used in automotive, industrial, consumer and telecom applications with a wide range of working voltages and a maximum peak pulse current rating of 3A. The device also has a fast response time of 6 nanoseconds. All in all, the ATV15C480JB-HF makes a great choice for applications that require overvoltage protection.

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