TPSMF4L10A Circuit Protection

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Transient Voltage Suppressors (TVS) Diodes are widely used in the electronics industry as a protector against voltage transients, such as those caused by electrostatic discharge (ESD) and other overvoltage conditions that can damage circuit board components. The TPSMF4L10A, from ON Semiconductor, is a dual common-anode TVS diode designed for applications requiring protection from a wide range of overvoltage transients, such as those caused by switching power supplies. This device is offered in a small, low-profile package, making it ideal for applications requiring high-density circuit board designs.

The TPSMF4L10A consists of two separate protective devices in a single package. Each device is configured in a common-anode arrangement and can be used in parallel to create higher breakdown protection from overvoltage transients. The device also has a low capacitance, allowing for use in high-speed signal lines where a low-capacitance device is desired. Additionally, the device features a fast response time, allowing it to rapidly react to overvoltage conditions. This device is also designed to meet the requirements for the IEC 61000-4-2 Level 4 ESD protection standard.

The working principle of the TPSMF4L10A is relatively simple. The device consists of two individual Zener diodes, each connected in an anode-common (or common-anode) configuration. These two diodes form a clamping circuit for overvoltage transients that is capable of absorbing and dissipating excessive energy before it can reach sensitive components on the circuit board. When the voltage on the circuit board exceeds the breakdown voltage of the device, the Zigzag Junction breaks down and becomes conductive, allowing the overvoltage to be shorted to ground. This action clamps the voltage on the circuit board and dissipates the overvoltage through the device.

The TPSMF4L10A can be used for a wide variety of applications, including EMI filtering, lightning protection, and voltage surge protection. It is specifically designed to protect sensitive integrated circuits (ICs) from Electrostatic Discharge (ESD), Lightning Induced Transients, and other transient overvoltage events. The device can also be used for positive-to-negative rail protection, where the two common-anode clamping diodes can be used in series to protect against negative transients. The device is also suitable for high-speed signal lines, as its low capacitance allows for use in applications requiring minimal insertion loss.

Overall, the TPSMF4L10A is an ideal device for applications requiring protection from a wide range of overvoltage transients. This device has an ultra-low profile, allowing for high-density circuit board designs, and it features a fast response time and low capacitance for use in high-speed signal lines. In addition, it meets the requirements for the IEC 61000-4-2 Level 4 ESD protection standard, making it an ideal choice for EMI filtering, lightning protection, and other applications requiring robust overvoltage protection.

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