Texas Instruments (TI) has announced the release of an advanced standalone active electromagnetic interference (EMI) filter integrated circuit (IC), which can help engineers implement smaller and lighter EMI filters to enhance system performance at lower costs while meeting EMI regulatory standards. Thanks to innovative development by Texas Instruments' R&D laboratory, Kilby Labs, for new concepts and breakthrough ideas, the new standalone active EMI filter IC product line can detect and eliminate up to 30dB of common-mode EMI (in the frequency range of 100kHz to 3MHz) in single-phase and three-phase AC power systems. Compared to pure passive filter solutions, this will reduce the size of the choke coil by 50% and meet strict EMI requirements.

Carsten Oppitz, General Manager of Texas Instruments' Switching Regulator Business Division, said: "To meet customers' demand for higher performance and lower cost systems, Texas Instruments continues to drive power innovation to address EMI design challenges in a cost-effective way. We believe that the new standalone active EMI filter IC product combination will further help engineers solve their design challenges and significantly improve performance and power density in automotive, enterprise, aerospace, and industrial applications."

Significantly reduce system size, weight, and cost, and increase reliability

The new active EMI filter IC series includes TPSF12C1 and TPSF12C3 for single-phase and three-phase commercial applications, as well as TPSF12C1-Q1 and TPSF12C3-Q1 for automotive applications. These devices can effectively reduce the heat generated in the power EMI filter, thereby extending the life of the filter capacitor and increasing system reliability. The new active EMI filter IC includes sensing, filtering, amplification, and injection stages. The IC is packaged in an SOT-23 14-pin package and integrates compensation and protection circuits, reducing implementation complexity and the number of external components.

Reduce common-mode emissions to meet strict EMI standards

The CISPR standard of the International Special Committee on Radio Interference is the global benchmark for limiting EMI in electrical and electronic equipment. TPSF12C1, TPSF12C3, TPSF12C1-Q1, and TPSF12C3-Q1 help detect, process, and reduce EMI in AC/DC power supplies, vehicle chargers, servers, UPS, and other similar systems dominated by common-mode noise. Engineers will be able to address EMI design challenges and meet CISPR 11, CISPR 32, and CISPR 25 EMI requirements.

Texas Instruments' active EMI filter IC meets IEC 61000-4-5 surge immunity requirements, significantly reducing the need for external protection components such as transient voltage suppression (TVS) diodes. Designers can easily select and implement suitable components for their system using support tools such as PSpice for TI simulation models and quick-start calculators