MXLSMBG160A Circuit Protection

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TVS (Transient Voltage Suppressor) diodes are configured in a wide range of oscillating, voltage regulating, and voltage clamping circuits. Applications of TVS diodes include computer circuit protection, surge protection, damage protection, and lightning protection. The MXLSMBG160A is a TVS diode that offers enhanced protection against transients. Its application fields, functional operating characteristics, and working principle are discussed in this paper.

Application Fields

The MXLSMBG160A is an ideal low-power transient suppressor for a variety of applications. It is suitable for use in common mode protection of equipment connected in a network environment, such as computer networking equipment, medical and other communication equipment, and automotive systems. Its specified working voltage is 20V, making it a great choice for protecting multiple voltage lines at the same time. The MXLSMBG160A is also suitable for the protection of low-power electronic circuits, such as those found in consumer electronics and media players.

Functional Operating Characteristics

The MXLSMBG160A has a fast response time of 5ns, which helps protect against fast transients. It provides excellent clamping performance in both ESD and surge applications. The clamping voltage in ESD applications is typified to 30V for the device. This ensures protection against surges up to 30V peak. In addition, the MXLSMBG160A features very low parts count and low profile design, thus making it suitable for use in restricted space applications.

Working Principle

The MXLSMBG160A applies a non-linear voltage protection mechanism to protect the target circuit from overvoltage. The device acts as a bidirectional voltage clamp, allowing current to flow in either direction, depending on the polarity of the applied voltage. When the applied voltage on the diode exceeds a certain limit (defined by the triggering voltage of the device), the diode begins to conduct, clamping the input voltage to the diode’s clamping voltage. Thus, the diode prevents the protection voltage of the circuit from exceeding its rated limits.

The MXLSMBG160A is configured as a series element in the circuit. When the applied voltage reaches a certain level, the diode turns on and starts conducting, shunting the incoming voltage into the ground path. This helps to prevent any further increase in the circuit voltage. This clamping action continues until the peak voltage of the transient is dissipated. Once the applied voltage drops below the diode’s rated clamping voltage, the diode returns to its normally non-conducting state.

Conclusion

In summary, the MXLSMBG160A is an excellent choice for low-power transient suppression applications. It features a fast response time, excellent clamping performance, and low parts count, making it ideal for use in a myriad of common mode protection scenarios. Furthermore, its operating principle is straightforward, enabling it to effectively protect target circuits without any uncontrolled current flow. For these reasons, the MXLSMBG160A is an excellent choice for a wide range of low-power transient suppression applications.

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