ATV50C191J-HF Circuit Protection

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TVS diodes are a special type of semiconductor that is designed to help protect electronics from overvoltage transients. The ATV50C191J-HF is an example of a transient voltage suppression (TVS) diode. It is a non-polarized device in a small footprint that offers high efficiency, low EMI, and low capacitance for protection of high speed data lines for a variety of applications.

The ATV50C191J-HF TVS diode is designed for use in a variety of consumer and industrial equipment such as computers, gaming systems, aviation equipment, and medical equipment. It is also suitable for automotive applications such as airbag systems, motor control systems, and lighting control systems. This device is ideal for short-line overvoltage protection against common-mode voltage transients, high static output voltage transients, and transient bus voltages in automotive and low-power consumer electronic applications.

The ATV50C191J-HF is a dual channel TVS diode with a VBR of 19.1V DC and a minimum breakdown voltage (VBR) of 4.0V DC. It provides excellent protection for data lines and is capable of absorbing 2000 W peak pulse power (10/1000μs waveform) with only 4.0V breakdown voltage. Additionally, it features very low thermal resistance and capacitance at low breakdown voltage. This enables the device to provide excellent EMI suppression performance, even in noisy environments. It also has a low failure rate and long-term reliability.

The working principle of the ATV50C191J-HF TVS diode is very simple. It works by shorting out high energy voltage transients, while maintaining low capacitance and resistance when in the low breakdown voltage states. The device is triggered into action when the voltage of the data line exceeds the breakdown voltage of 4.0V DC. Upon detection of the excess voltage, the device begins to conduct current and absorb the energy from the transient, limiting the voltage of the data line. During normal operation of the data line the device has low capacitance and resistance, allowing smooth operation of the data line.

In summary, the ATV50C191J-HF is an ideal solution for a variety of overvoltage protection applications. It provides excellent performance in terms of low breakdown voltage, low capacitance, low EMI, and high power absorption. It is suitable for consumer electronics, industrial applications, and automotive systems including motor control systems, lighting control systems, and airbag systems. Its simple working principle involves shorting out high voltage transients, while allowing normal operation of the protected data line.

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