SLOA343 August   2024 TPS543820 , TPS543A22 , TPSM843620 , TPSM843A22

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Layout Techniques to Reduce EMI
    1. 2.1 Placement of Passive Components
    2. 2.2 Ground Flooding
    3. 2.3 Minimize Number of Antennas
    4. 2.4 Via Stitching
    5. 2.5 Additional Steps to Minimize Impedance or Noise
  6. 3Designing for EMI-Optimized Layout
  7. 4Test Results for Radiated Interference
  8. 5EMI Filtering
  9. 6Summary
  10. 7References

2.3 Minimize Number of Antennas

Having exposed traces of copper or any sort of conductor that has current or voltage running through it can cause it to act as an antenna and can radiate. Therefore, the first step taken to minimize EMI on this layout was to remove any unpopulated footprints and test points.