Date: 25/06/2012

TVS diodes from Infineon for NFC system Antenna-end

To protect NFC system's RF-front end connecting to antenna, Infineon Technologies has introduced a new TVS diodes . The new ESD18VU1B diode stops electrostatic discharges (ESD) entering NFC system.

Infineon explains NFC antennas are often situated on easily accessible spring-mounted contacts on the top of the phone, making them susceptible to ESD events that can easily pass into the NFC module and damage or destroy its components. The new Infineon diode is implemented on the signal path between the antenna and NFC modem. It is optimized to the requirements of NFC systems with characteristics to balance between efficient protection and signal integrity in the RF signal line.

The new diode series can withstand repeated ESD strikes according to the IEC61000-4-2 industry standard without any performance loss and reacts to multiple discharges within less than 1 ns response time.

The ESD18VU1B optimized features for NFC antenna protection include:

· Inherent dynamic resistance of 0.6 ? (ohm) enables ESD18VU1B diodes to clamp 8 kV electrostatic discharges to voltage levels as low as 28 V without any degradation issue. Infineon claims this is better than many other in the market.

· Bidirectional configuration with a very low capacitance of only 0.3 pF and high linearity to minimize signal degradation at high frequencies.

· Protection in AC signal voltage ranges swinging above and/or below ground up to a maximum of ±20 V.

· Leakage current below 100 pA at 18 V in normal operating mode to help in reducing power consumption.

The new ESD18VU1B series is available in two Infineon standard packages, TSLP-2-1 (1.0x0.6x0.39mm) and an ultra-small TSSLP-2-1 (0.6x0.3x0.3mm) device that is ideally suited for ultra-slim and small electronic devices. They are lead-free, halogen-free and RoHs-compliant, and are therefore extremely environmentally-friendly.

Availability and Pricing: The new ESD18VU1B diodes are available in high-volume production. Pricing for the TSSLP-2-1 package type is $0.05 per piece (15,000 pieces quantity).

More info at: www.infineon.com/tvsdiodes