TLP28A Circuit Protection

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Transient Voltage Suppressors (TVS) are widely used to protect semiconductor components from ESD, lightning, and other high-energy transients. The TLP28A is an MCU compatible voltage suppressor that can protect a single pin of a microcontroller from transients up to 45 V. In this article we\'ll discuss the application fields and principles of operation of the TLP28A.

Application Fields

The TLP28A is primarily used to provide protection for the microcontrollers and digital logic circuits. It is suitable for use in a wide range of applications, from automotive to industrial applications. The TLP28A offers effective protection against high-voltage transients and has a low clamping voltage for reliable operation. The TLP28A also offers a fast response time and low capacitance, which is ideal for high-speed logic applications.

The TLP28A is also suitable for protecting MCU pins from over-voltage and reverse polarity conditions. It can also be used to protect against reverse currents for devices such as MOSFETs or SCRs. The TLP28A is also suitable for use in high-voltage systems, as it can withstand up to 45-V transients. It is also ideal for applications in which multiple microcontroller pins must be protected, as it can be used in parallel with other protectors for increased protection.

Working Principle

The TLP28A is a voltage-suppressing device that works by clamping transient voltages at a given level. The device is comprised of two components: a zener diode and a varistor. The zener diode is used to limit the voltage across the device\'s terminals to a certain level, while the varistor is used to dissipate the excess charge. The two components work together to form an effective protection against transient voltages.

The zener diode is used to suppress the voltage across the two terminals. When the voltage across the terminals exceeds the breakdown voltage of the zener diode, the device begins to conduct. This lowers the voltage across the terminals to the breakdown voltage of the diode. The varistor is then used to dissipate the excessive charge. The device is specifically designed to allow a large amount of current to flow across the device, while keeping the voltage across the terminal at a predefined level.

The TLP28A is an effective device for protecting microcontroller pins from ESD, lightning, and high-energy transients. The device is designed for both over-voltage and reverse-voltage protection, and offers a low capacitance and fast response time. This makes it suitable for use in high-speed logic applications. The TLP28A is also suitable for use in high-voltage systems, as it can withstand up to 45-V transients. It is also ideal for applications in which multiple microcontroller pins must be protected, as it can be used in parallel with other protectors for increased protection.

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