As electrical systems become more dense and interconnected, mitigating EMI becomes a key system design consideration for engineers. Thanks to the innovative development of new concepts and breakthrough ideas by Kilby Labs, the new line of stand-alone active EMI filter IC products can detect and eliminate common-mode EMI up to 30 db (frequency range 100 khz to 3 mhz) in single-phase and three-phase electric power systems. Compared with the pure passive filter solution, this feature enables the designer to reduce the choke size by 50% and meet the stringent EMI requirements.

How to implement compact and efficient EMI input Filter design is one of the major challenges in designing high-density switching regulators. By capacitive amplification, these new active EMI filter ics enable engineers to reduce the inductance of the common-mode choke by up to 80% , this will help to improve mechanical reliability and power density in a cost-effective manner. The new active EMI filter IC series includes TPSF12C1 and TPSF12C3 for single-phase and three-phase commercial applications, and TPSF12C1-Q1 and TPSF12C3-q1 for automotive applications. These devices can effectively reduce the heat generated in power EMI filters, thus extending the service life of filter capacitors and improving system reliability. The new active EMI filter IC includes sensing, filtering, gain and injection stages. The IC is packaged with SOT -2314 pins and integrates compensation and protection circuits to further reduce implementation complexity and reduce the number of external components.