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TVS – Diodes

The MLXCE28A from Melexis Technologies is a unidirectional Transient Voltage Suppressor (TVS) diode that helps protect electronic circuits from voltage transients. With a nominal breakdown voltage of 28 volts, this component offers a wide range of applications.

Application

The MLXCE28A is used in various applications. The low capacitance, low clamping voltage, and fast reaction time of the device make it particularly suitable for the protection of power supplies and microcontrollers. It can also be used as protection against overvoltage in various automotive applications, including powertrain, lighting, airbags, and driver assistance systems. The integrated ESD protection and overload impedance are additional features that make the component suitable for a variety of automotive applications.

Working Principle

The MLXCE28A is a Transient Voltage Suppressor (TVS) diode which is used to protect electronics against transient overvoltages caused by electrical transients. When an overvoltage occurs, the diode becomes forward-biased and begins to conduct current, dissipating the energy and limiting the rise of voltage. When the overvoltage is removed, the diode becomes reverse-biased, and the circuit is again protected.

The TVS diode utilizes avalanche breakdown principle to protect the circuit. When the device is subjected to an overvoltage, the majority carriers are accelerated to sufficiently high velocities to create additional impact ionization (avalanche) in the material. This leads to a significant increase in current which is dissipated in the form of heat.

Conclusion

The MLXCE28A from Melexis Technologies is an unidirectional Transient Voltage Suppressor (TVS) diode that can be used to protect electronic circuits from transient overvoltages. It has a wide range of applications, including the protection of power supplies, microcontrollers, automotive powertrain, lighting, and various other components. The diode utilizes the avalanche breakdown principle to protect the circuit, and its fast reaction time is particularly useful.

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