Texas Instruments

TPSF12C3-Q1 and TPSF12C1-Q1 Automotive EMI Filters

Texas Instruments' standalone active EMI filters (AEF) for common-mode noise mitigation in single-phase AC automotive power systems

Image of Texas Instruments' TPSF12C3-Q1 and TPSF12C1-Q1 Automotive EMI FilterTexas Instruments' TPSF12C3-Q1 and TPSF12C1-Q1 are active filter ICs that are designed to reduce common-mode (CM) electromagnetic interference (EMI) in three-phase AC power systems. The AEF is configured with voltage sense and current inject (VSCI) using a capacitive multiplier circuit to emulate the Y-capacitors in a conventional passive filter design. The devices sense the high-frequency noise on each power line using a set of sense capacitors and inject noise-canceling currents back into the power lines using an injection capacitor. The effective active capacitance is set by the circuit gain and the injection capacitance.

The AEF IC sensing and injection impedances use relatively low capacitance values with small component footprints. The devices include integrated filtering, compensation and protection circuitry, and an enable input. The TPSF12C3/C1-Q1 provides a very low impedance path for CM noise in the frequency range for EMI measurements. Enabling up to 30 dB of CM noise reduction at the lower end of specified frequency ranges (such as 150 kHz to 3 MHz) significantly reduces the size, weight, and cost of the CM filter implementation.

Features
  • AEC-Q100 qualified for automotive applications:
    • Ambient operating temperature range Grade 1: -40°C to +125°C
  • Functional safety-capable: documentation is available to aid in the functional safety system design
  • Voltage-sense current-inject active EMI filter
    • Optimized for CISPR 25 Class 5 automotive EMI requirements
    • Low impedance for common-mode emissions
    • 50%+ reduction in choke size, weight, and cost
    • Peak inject current: ±80 mA (typ.)
  • Wide supply voltage range: 8 V to 16 V
  • Junction temperature range: -40°C to +150°C
  • Simple configuration for three-phase AC systems:
    • Integrated sensing filter and summing network
    • Low leakage current at line frequency
    • Simplified compensation network
  • Inherent protection features for robust design:
    • Withstands surge of 6 kV (IEC 61000-4-5) with minimal external component count
    • Enable pin for remote ON and OFF control
    • VDD voltage UVLO protection with hysteresis
    • Thermal shutdown protection with hysteresis
  • Package: 4.2 mm x 2 mm SOT-23 14-pin DYY
Applications
  • Onboard chargers for BEVs and PHEVs
  • Automotive isolated DC/DC regulators
  • HVAC motor controls, aerospace, and defense
     

    TPSF12C3-Q1 and TPSF12C1-Q1 Automotive EMI Filters

    ImageManufacturer Part NumberDescriptionAvailable QuantityPriceView Details
    AUTOMOTIVE COMMON-MODE ACTIVE EMTPSF12C1QDYYRQ1AUTOMOTIVE COMMON-MODE ACTIVE EM3429 - Immediate$2.77View Details
    AUTOMOTIVE COMMON-MODE ACTIVE EMTPSF12C3QDYYRQ1AUTOMOTIVE COMMON-MODE ACTIVE EM2843 - Immediate$3.26View Details

    Evaluation Boards

    ImageManufacturer Part NumberDescriptionUtilized IC / PartPrimary AttributesAvailable QuantityPriceView Details
    EVAL BOARD FOR TPSF12C1-Q1TPSF12C1QEVMEVAL BOARD FOR TPSF12C1-Q1TPSF12C1-Q18V ~ 16V Operating Voltage13 - Immediate$90.00View Details
    EVAL BOARD FOR TPSF12C3-Q1TPSF12C3QEVMEVAL BOARD FOR TPSF12C3-Q1TPSF12C3-Q18V ~ 19V Input Voltage6 - Immediate$90.00View Details
    Published: 2023-09-11

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    TPSF12C3 Active EMI Filter (AEF) Texas Instruments' TPSF12C3 common-mode AEF IC is designed to improve the CM EMI signature for three-phase AC power systems applications.