SLVAEX2 September   2020  – MONTH  TPS55288 , TPS55288-Q1 , TPS552882 , TPS552882-Q1

 

  1.   Trademarks
  2. 1Introduction
  3. 2Design Process
    1. 2.1 Radiation Theory
    2. 2.2 Root Cause of the Broad Band EMI in a Buck-Boost Converter
    3. 2.3 How to Achieve Low EMI with TPS55288 Buck-Boost Converter
      1. 2.3.1 Adding Ground Planes under the Critical Loops
      2. 2.3.2 Using Symmetrical Layout Configuration
      3. 2.3.3 Using Frequency Dithering Function
      4. 2.3.4 Adding RC Snubbers at the Switching Node
      5. 2.3.5 Adding Filters at the Input and Output Side
  4. 3Schematic and Test Result
    1. 3.1 Test Result
  5. 4Summary
  6. 5References

3 Schematic and Test Result

Figure 3-1shows the schematic for the EMI test. One differential choke is added at the input side as the differential filter, two ferrite beads were added at the input side as the common mode filter.

GUID-20200826-CA0I-JCZM-Z2QD-G4K5B7RZPHGK-low.png Figure 3-1 Schematic for the EMC Test