TIDT232 September   2021

 

  1. 1Description
  2. 2Device Description
  3. 3Efficiency
  4. 4Start-up
  5. 5Shutdown
  6. 6Output Voltage Ripple
  7. 7EMI Results
  8. 8Test Setup
    1. 8.1 EMI Scans - Single UCC12050, 5 VOUT, 100 mA
    2. 8.2 EMI Scans - 4x UCC12050, 5 VOUT
    3. 8.3 EMI Scans - Conclusion

8 Test Setup

The test configuration shown in Figure 8-2 uses a 6-V, DC battery as the input voltage source to the test the EVM. For the purpose of reducing 6 V to about 5.4 V, a diode is used in series with the return connection to the DC battery. A short, shielded BNC to SMB cable is used to connect the battery to the test EVM. A toroid clamp is used to minimize the EMI effect of the cable.

GUID-20210409-CA0I-5CGG-RNTH-2CDTMX2HJS6V-low.jpgFigure 8-1 Anechoic Chamber – CISPR 32 Radiated EMI Test
GUID-20210409-CA0I-4R4B-S2RD-F6BZMPHDRZPT-low.pngFigure 8-2 CISPR 32 VINP Battery to EVM Test Setup