Common mode EMI filters integrate ESD protection for interfaces

March 15, 2017 // By Nick Flaherty
Nexperia chip scale packaging for EMI and ESD
Nexperia has launched three new series of common mode EMI filters with integrated ESD protection for a range of interfaces.

The PCMFxUSB3S, PCMFxHDMI2S and PESDxUSB3S support for USB 3.1 Type C, HDMI 2.0 and MIPI M-PHY interfaces. 

System engineers benefit from having a single device instead of two (common mode filter plus TrEOS ESD protection component) saving PCB space and improving reliability and design flexibility. With both solutions available in the same package, designers can determine at a late stage whether they need to include EMI filtering at all without being concerned about PCB layout spins. Also, the same board layout will be suitable for all markets, whether filtering is required or not. The integrated common mode filters also feature a wide differential passband of more than 6 GHz.

Nexperia’s TrEOS ESD protection technology has a low capacitance to maintain excellent signal integrity, low clamping voltage/dynamic resistance to protect the system chip, and high ESD and surge ruggedness.  By using active silicon-controlled rectification, none of these parameters are compromised. The result is a fast turn-on time of about 0.5 ns that enables devices to withstand up to 20 kV contact discharge. This exceeds level 4 of the IEC 61000-4-2 standard.