SLVUCK7 November 2022 TPSF12C1 , TPSF12C1-Q1
The TPSF12C1QEVM evaluation module (EVM) is specifically designed to conveniently evaluate the performance of the TPSF12C1-Q1 active filter IC. The solution helps to improve the common-mode (CM) electromagnetic interference (EMI) signature in single-phase AC and three-wire DC power systems.
The TPSF12C1-Q1 provides a very low impedance path for CM noise in the frequency range of interest for EMI measurement and helps to meet prescribed limits for EMI standards, such as:
Enabling up to 25 dB of CM noise reduction at the lower end of specified frequency ranges (for example, 150 kHz to 3 MHz) significantly reduces the size, cost and weight of the common-mode filter implementation, specifically the common-mode chokes. 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.
A header on the EVM provides connections to the sense and inject capacitors, which are high-voltage rated components located off-board at or near the passive filter solution. Also included on the EVM are connections for the bias power supply (VDD and GND), which is set between 8 V and 16 V, and a remote enable (EN) signal. The GND terminal of the EVM refers to chassis or Earth ground of the system.
The damping and compensation component values included with this EVM may require modification, depending on the specifics of the EMI filter implementation and the target application. Refer to the TPSF12C1-Q1 Standalone Active EMI Filter for Common-mode Noise Mitigation in Single-Phase AC Automotive Power Systems data sheet and TPSF12C1-Q1 quickstart calculator for additional guidance pertaining to AEF circuit operation, passive component selection and expected EMI performance.