Development of Industry’s First Thin-Film Common Mode Filter featuring High Speed Differential Transmission Common Mode Noise Suppression and ESD Protection in a Single Component
TDK-EPC has successfully developed the world’s first thin-film common mode filter featuring both high-speed differential transmission common mode noise suppression and ESD (Electrostatic discharge) protection all in a single component. The new filter has a form factor of (1.25 x 1.00 x 0.60 mm3), using the proprietary thin-film circuit formation and materials technologies. Successful addition of ESD suppressor function to the already existing EMI (Electromagnetic interface)function in this newly developed filter has helped to eliminate any needs for additional varistor for ESD suppression, resulting in reduced number of components and mounting area, as well as further miniaturization of mobile devices.
The new filter comes with a cutoff frequency of 5.0 GHz, the common mode impedence of 90 ? ±25 ?, rated current of 100 mA and ESD immunity that complies with the IEC61000-4-2 international surge standards. Furthermore, the new filter’s low parasitic capacitance has almost no effect on the impedance characteristic (TDR measurement), making the new filter ideal for use in high-speed, high-volume interfaces such as HDMI, USB 3.0, as well as SATA in consumer electronics applications. The mass production of this filter has already begun this month.