The TPSF12C3 is an active filter IC designed to reduce common-mode (CM) electromagnetic interference (EMI) in three-phase AC power systems.
The active EMI filter (AEF) configured with voltage sense and current inject (VSCI) uses a capacitive multiplier circuit to emulate the Y-capacitors in a conventional passive filter design. The device senses the high-frequency noise on each power line using a set of sense capacitors and injects 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 sensing and injection impedances use relatively low capacitance values with small component footprints. The device includes integrated filtering, compensation and protection circuitry, and an enable input.
The TPSF12C3 provides a very low impedance path for CM noise in the frequency range of interest for EMI measurement. Enabling up to 30 dB of CM noise reduction at the lower end of specified frequency ranges (for example, 150 kHz to 3 MHz) significantly reduces the size, weight and cost of the CM filter implementation.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | TPSF12C3 Standalone, Active, EMI Filter for Common-mode Noise Mitigation in Three-Phase, AC, Power Systems datasheet (Rev. A) | PDF | HTML | 28 Apr 2023 |
| EVM User's guide | TPSF12C3QEVM Active EMI Filter Evaluation Module for Three-Phase AC Power System (Rev. A) | PDF | HTML | 31 Jul 2023 | |
| White paper | How Active EMI Power-Supply Filter ICs Mitigate Common-Mode Emissions | PDF | HTML | 16 Mar 2023 | |
| White paper | 主動 EMI 濾波器 IC 如何降低單相和三相電源系統中的共模輻射，並提升功率密度 | PDF | HTML | 14 Feb 2023 | |
| White paper | 액티브 EMI 필터 IC가 단상 및 3상 전원 시스템에서 공통 모드 방출을 완화하고 전력 밀도를 높이는 방법 | PDF | HTML | 14 Feb 2023 | |
| Functional safety information | TPSF12C3 Functional Safety FIT Rate, FMD, and Pin FMA | PDF | HTML | 11 Nov 2022 | |
| Certificate | TPSF12C3QEVM EU RoHS Declaration of Conformity (DoC) | 01 Nov 2022 |
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Welcome to the TPSF12C1/-Q1 and TPSF12C3/-Q1 quickstart design tool. This standalone tool facilitates and assists the power-supply engineer with the design of an AEF circuit based on this family of common-mode AEF ICs. As such, the user can expeditiously arrive at an optimized design to meet (...)
This Mathcad file is offered to predict the stability of a voltage-sense current-inject AEF circuit, in particular with respect to TI's TPSF12C1/3/-Q1 family of common-mode (CM) AEF ICs, and to assist with component selection. The model is inclusive of most parasitic effects and can be used as a (...)
| Package | Pins | Download |
|---|---|---|
| SOT-23-THN (DYY) | 14 | View options |
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Welcome to the TPSF12C1/-Q1 and TPSF12C3/-Q1 quickstart design tool. This standalone tool facilitates and assists the power supply engineer with the design of an active EMI filter (AEF) circuit based on this family of common-mode AEF ICs. As such, the user can expeditiously arrive at an optimized design to meet the application requirements.
TPSF12C1/3 mathcad file
This Mathcad worksheet is offered to predict the stability of a voltage-sense, current-inject active EMI filter (AEF) circuit, in particular with respect to TI's TPSF12C1/3/-Q1 family of AEF ICs, and to assist with component selection. The model is inclusive of most parasitc effects and can be used as a quick check of the loop gain and insertion loss prior to simulation, bench measurement and fine tuning.
The worksheet functions for single- and 3-phase AC systems and facilitates two ways of entering the CM choke parameters:
1. Using an equivalent circuit model with (a) resistive and capacitive parasitics – suitable for ferrite-core chokes; (b) a ladder network of three parallel RL circuits -- suitable for nanocrystalline chokes
2. Using measured impedance data (magnitude and phase).
The worksheet is ideal for knowledge capture, unit-aware calculation reuse and for engineering collaboration amongst design, systems & application engineers.