TI pioneers the industry's first stand-alone active EMI filter ICs, supporting high-density power supply designs

Texas Instruments debuted the industry’s first stand-alone active electromagnetic interference (EMI) filter integrated circuits (ICs), enabling engineers to implement smaller, lighter EMI filters, to enhance system functionality at reduced system cost while simultaneously meeting EMI regulatory standards.

As electrical systems become increasingly dense and interconnected, mitigating EMI is a critical system design consideration for engineers. With innovative developments from Kilby Labs, TI’s research and development labs for new concepts and breakthrough ideas, the new portfolio of stand-alone active EMI filter ICs can sense and cancel common-mode EMI by as much as 30 dB at frequencies between 100 kHz and 3 MHz in single- and three-phase AC power systems. This capability enables designers to reduce the size of chokes by 50%, compared to purely passive filter solutions, and meet stringent EMI requirements.

One of the main challenges when designing high-density switching regulators is how to implement a compact and efficient design of the EMI input filter. Through capacitive amplification, these new active EMI filter ICs enable engineers to shrink the inductance value of common-mode chokes by as much as 80%, helping to cost-effectively achieve improved mechanical reliability and increased power density (more info).