TPSMF4L20A

Voltage - Clamping (Max) @ Ipp:	32.4V
Supplier Device Package:	SOD-123FL
Package / Case:	SOD-123F
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 150°C (TJ)
Capacitance @ Frequency:	--
Applications:	Automotive
Power Line Protection:	No
Power - Peak Pulse:	400W
Current - Peak Pulse (10/1000µs):	12.3A
Series:	Automotive, AEC-Q101, TPSMF4L
Voltage - Breakdown (Min):	22.2V
Voltage - Reverse Standoff (Typ):	20V
Unidirectional Channels:	1
Type:	Zener
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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TPSMF4L20A Application Field and Working Principle

TVS (Transient Voltage Suppressors) are solid-state protective devices used to protect components and equipment from damage due to high transient voltages. TVS diodes are designed to protect sensitive electronics from transient voltage surges while providing a high level of transient surge current protection. The TPSMF4L20A is a unidirectional TVS diode designed to limit the transient surge voltage to a maximum of 22V. The TPSMF4L20A has an ultra-low on-state voltage drop and low clamping ratios, making it ideal for automotive applications.

Application Field

The TPSMF4L20A is designed for use in automotive applications. It provides efficient electrostatic discharge (ESD) protection for automotive components. It is also suitable for use in other applications such as electrical housings, cellular phones, audio equipment, and other circuitry susceptible to high transient voltage surges.

Working Principle

TVS diodes are designed to provide a conducting path for a surge current when a high transient voltage is present. The TPSMF4L20A is designed to limit the transient surge voltage to a maximum of 22V. When the input voltage exceeds the Breakdown Voltage, the diode begins to conduct and the voltage across the diode is clamped to the peak value of 22V. The TPSMF4L20A also provides fast-response protection against ESD pulses up to ±16 kV (ESD 2 waveform to industry standard IEC-61000-4-2).The TPSMF4L20A consists of a Zener diode, which provides the desired clamping voltage, and a 2A avalanche diode, which provides the required response time. The Avalanche diode is able to turn on fast and clamp the voltage down to a lower level quickly. The Zener diode can clamp the voltage to a lower level over an extended period of time. The Zener diode is able to reduce the dropout voltage across the diode to ultra-low levels, allowing the TPSMF4L20A to be used in high frequency applications.

Conclusion

The TPSMF4L20A is a unidirectional TVS diode which is designed for protecting sensitive electronics from transient voltage surges. The TPSMF4L20A has an ultra-low on-state voltage drop and low clamping ratios, making it ideal for automotive applications. It can provide fast-response protection against ESD pulses up to ±16 kV (ESD 2 waveform to industry standard IEC-61000-4-2). The combination of a Zener diode and an Avalanche diode provides the desired clamping voltage and the fast response time required for reliable surge protection.

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