TPSMB220A

Transient Voltage Suppressor Diode (TVS-Diodes) are a commonly used class of over-voltage protection devices that help protect valuable circuit components. In this article we will take a look at the TPSMB220A, a popular TVS-Diode. We will look at its application field and working principle.

Application Field of TPSMB220A

The TPSMB220A is a bidirectional, low capacitance, transil-protected TVS-Diode primarily used to protect high-speed data lines from damage caused by ESD (electro-static discharge) and electrical surge events. It is popularly used in applications such as data communications and telecommunication equipment, medical systems, consumer electronics, automotive, and power supplies.

Working Principle

When the voltage before the TPSMB220A exceeds the breakdown voltage (VBR) specified in the datasheet, the device begins to conduct. This creates a low on-resistance (<50 Ohms) path for the over-voltage, thus limiting the voltage at the protected component to a safe level.

There are two main types of electro-static discharge protection TVS-Diodes: symmetric and asymmetric. The symmetric type has a break-over voltage near the common mode working voltage, providing good protection in both directions. The asymmetric type, such as the TPSMB220A, has peak clamping voltages (Vp) and break-over voltages (VBR) that are asymmetrically shifted relative to the common mode working voltage, providing excellent protection in one direction and a fail-safe level of protection in the other. This makes the TPSMB220A ideal for use in ESD protection applications requiring a minimal amount of capacitance.

Conclusion

The TPSMB220A is a popular transient voltage suppressor diode used for protecting against high-voltage transients and electro-static discharge events. It is well suited for applications such as data communications and telecommunication equipment, medical systems, consumer electronics, automotive, and power supplies. The TPSMB220A’s asymmetric VBR and Vp makes it ideal for ESD protection in applications requiring a minimal amount of capacitance.