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

3 Designing for EMI-Optimized Layout

Four different layouts are created for the four different buck regulators:

  1. TPS543820
  2. TPSM843620
  3. TPS543A22
  4. TPSM843A22
TPS543620 EVM Standard LayoutFigure 3-1 TPS543620 EVM Standard Layout
TPSM843620 EVM Standard LayoutFigure 3-3 TPSM843620 EVM Standard Layout
TPS543B22 EVM Standard LayoutFigure 3-5 TPS543B22 EVM Standard Layout
TPSM843B22 EVM Standard LayoutFigure 3-7 TPSM843B22 EVM Standard Layout
TPS543820 EMI-Optimized LayoutFigure 3-2 TPS543820 EMI-Optimized Layout
TPSM843620 EMI-Optimized LayoutFigure 3-4 TPSM843620 EMI-Optimized Layout
TPS543A22 EMI-Optimized LayoutFigure 3-6 TPS543A22 EMI-Optimized Layout
TPSM843A22 EMI-Optimized LayoutFigure 3-8 TPSM843A22 EMI-Optimized Layout