Texas Instruments (TI) announced the introduction of an industry-leading stand-alone active electromagnetic interference (EMI) filter integrated circuit (IC) that helps engineers implement smaller, lightweight EMI filters to enhance system functionality at a lower system cost while meeting EMI regulatory standards.
As electrical systems become more dense and interconnected, EMI mitigation becomes a key system design consideration for engineers. Thanks to Kilby Labs' innovative development of new concepts and breakthrough ideas, The new standalone Active EMI Filter IC product family detects and eliminates common-mode EMI up to 30dB (frequency range 100kHz to 3MHz) in single-phase and three-phase AC power systems. This capability enables designers to reduce choke size by up to 50% compared to pure passive filter solutions and meet stringent EMI requirements.
"To meet our customers' demands for higher performance and lower cost systems, Texas Instruments continues to drive power innovation to address EMI design challenges in a cost-effective manner," said Carsten Oppitz, general manager of Texas Instruments' switching voltage Regulator Business unit. We believe the new portfolio of standalone Active EMI filter IC products will further assist engineers in solving the design challenges they face and dramatically improve performance and power density in automotive, enterprise, aerospace and industrial applications."
Advantage
Significantly reduces system size, weight, and cost, and improves reliability
How to implement compact and efficient EMI input filter design is one of the main challenges in the design of high density switching regulators. With capacitance amplification, these new active EMI filter ics enable engineers to reduce the inductance value of common-mode chokes by up to 80%, which will help improve mechanical reliability and power density in a cost-effective manner.
The new active EMI filter IC family 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 the power supply EMI filter, thus extending the service life of the filter capacitor and improving the system reliability.
The new active EMI filter IC includes sensing, filtering, gain and injection stages. The IC is packaged in a SOT-23 14-pin package and incorporates compensation and protection circuits to further reduce implementation complexity and reduce the number of external components.
Mitigated common-mode emission to meet strict EMI standards
The International Special Committee on Radio Interference (CISPR) standard 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 various AC/DC power supplies, on-board chargers, servers, UPS, and other similar systems dominated by common-mode noise. Engineers will be able to address EMI design challenges and meet the EMI requirements of CISPR 11, CISPR 32 and CISPR 25.
Ti's active EMI filter IC meets IEC 61000-4-5 surge immunity requirements, greatly reducing the need for external protection components such as transient voltage suppression (TVS) diodes. With support tools such as PSpice for TI simulation models and Quick Start calculators, designers can easily select and implement the right components for their systems.
Ti is committed to further power supply development through continuous breakthrough results, such as low EMI power supply innovations that help engineers reduce filter size and cost while significantly improving design performance, reliability and power density.
