MXLP4KE9.1CA Circuit Protection

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TVS diodes, which stands for transient voltage suppressor, are widely used across various industries such as the military, aerospace, medical, automotive, and consumer sectors. The MXLP4KE9.1CA device from ON Semiconductor is a low capacitance TVS diode array, designed to provide reliable electrostatic protection. The device features two arrays of 4-channel thyristor circuits in which each channel includes one independent diode for bidirectional protection. In this blog post, we’ll explore the application field of MXLP4KE9.1CA, and its working principle.

Application Field

The MXLP4KE9.1CA is designed to protect equipment and components from high voltage transients. The device is ideal for applications such as mobile handset, laptop computer, and cellular base station. Its low capacitance and resulting high-speed response make it suitable for high-speed data line applications like USB, SATA, DisplayPort, and HDMI. Additionally, it is capable of protecting up to four bidirectional channels with common source, and can handle transients with working voltages up to ±40V and peak pulse power up to 315W.

Working Principle

A TVS diode has a p-n junction that acts as a voltage regulated device – meaning its function is to protect from overvoltages and clamp them at a well-defined level. When a voltage above the breakdown voltage is reached, the diode turns on or "triggers", and then acts like a short-circuit, allowing the current to flow. The key features of the MXLP4KE9.1CA device are based on its low capacitance and resulting high-speed response. This diode works at very low capacitance levels, ranging from 1.2pF to 1.6pF, which helps protect data lines from Electrostatic Discharge (ESD). Its response time is extremely fast, effectively clamping transients well before they can propagate through the system.

The MXLP4KE9.1CA device is designed with ESD protection in mind, and is capable of handling ESD pulses up to ±15kV Human Body Model. It also meets the IEC 61000-4 levels for ESD immunity. It is packaged in a small SOT-23-6 package, which helps reduce board space, an important factor for many designs. Additionally, it has excellent surge protection capabilities, and is rated for a peak pulse power of 315W per line – which is more than four times the requirement of the USB standard.

In summary, the MXLP4KE9.1CA from ON Semiconductor is a four-channel, low-capacitance thyristor diode array that provides fast response time, excellent surge protection capabilities, and high reliability. It can be used in a wide range of applications to protect delicate equipment and data lines from ESD and transient voltage.

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