Texas Instruments TPSF12C1 User Manual

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EVM User's Guide: TPSF12C1EVM-FILTER
Active EMI Filter Evaluation Module for Single-Phase AC
Power Systems
Description
The TPSF12C1EVM-FILTER
(EVM) is specifically designed to validate the
performance of the TPSF12C1
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 TPSF12C1EVM-FILTER
2. Study this EVM user's guide and PCB
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 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
– Voltage-sense, current-inject AEF topology
presents low shunt impedance by amplifying
the effective value of Y-capacitance
• Up to 30 dB reduction in the CM EMI
signature from 100 kHz to 3 MHz
SLVUCQ2 – JULY 2023
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evaluation module
power-supply filter
EVM
layout files
to assist
for applications
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– A higher effective Y-capacitance enables a
reduction in CM choke size, weight and cost
• 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 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
• The EVM includes a high-PSRR LDO for
step-down regulation to 12 V (if needed)
– 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 two-layer
design with 5" × 3" (127 mm × 76 mm) total area
Applications
• On-board charger for BEVs and PHEVs
• Power delivery – high-density
• Welders and other industrial systems
• Telecom AC/DC rectifiers
Active EMI Filter Evaluation Module for Single-Phase AC Power Systems
Description
PCB
server rack PSUs
1