Texas Instruments TPSF12C1QEVM User Manual

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EVM User's Guide: TPSF12C1QEVM
Active EMI Filter Evaluation Module for Single-Phase AC
Power Systems
Description
The TPSF12C1QEVM evaluation module (EVM) is
specifically designed to validate the performance of
the TPSF12C1 power-supply filter IC. The active EMI
filter (AEF) helps to improve the common-mode (CM)
electromagnetic interference (EMI) signature in single-
phase AC power systems by amplification of the
effective Y-capacitance value.
Get Started
1. Order the TPSF12C1QEVM
2. Study this EVM user's guide and
3. Use the TPSF12C1 quickstart calculator
with EMI filter design and component selection
4. Prior to connecting the power stage, test the
active filter circuit with a low-voltage signal source
5. Connect the filter to an AC-input power stage and
verify the INJ (pin 13) voltage swing is within limits
6. Measure the total (DM and CM) EMI signature
and use a splitter to isolate the CM contribution
Features
• Improved CM EMI performance
with single-phase AC input
– Helps to meet EMI standards, such as CISPR
11, 25 or 32
– Voltage-sense, current-inject AEF topology
presents low shunt impedance to ground
• Up to 30 dB reduction in the CM EMI
signature from 100 kHz to 3 MHz
SLVUCK7A – NOVEMBER 2022 – REVISED JULY 2023
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EVM
PCB layout files
to assist
for applications
Active EMI Filter Evaluation Module for Single-Phase AC Power Systems
Copyright © 2023 Texas Instruments Incorporated
– A higher effective Y-capacitance enables a
reduction in CM choke size, weight and cost
– No additional magnetic components required
• Simple configuration for single-phase AC systems
– Integrated sensing filter and summing network
– Low Y-capacitor line-frequency leakage current
to chassis ground maintains safety
– Simplified compensation and damping network
• Inherent protection features for reliable design
– Withstands 6-kV+ surge with minimal external
component count
• Helps meet IEC 61000-4-5 surge immunity
system-level specification
• Integrated SENSE input surge protection
– Wide VDD supply voltage range of 8 V to 16 V
• Undervoltage lockout (UVLO) set to turn on
and off at 7.7 V and 6.7 V, respectively
• Quiescent supply current of 12.5 mA
– 175°C thermal shutdown protection
– Integrated VDD-to-EN pullup allows use of an
open-drain/collector device for disable function
• Fully assembled, tested and proven four-layer
PCB design with 1" × 0.8" (25 mm × 20 mm) total
area
Applications
• On-board charger for BEVs and PHEVs
• Power delivery – high-density
• Welders and other industrial systems
• Telecom AC/DC rectifiers
Description
server rack PSUs
1