TIDT242 November   2022

 

  1.   Description
  2.   Features
  3.   Applications
  4. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Required Equipment
    3. 1.3 Dimensions
  5. 2Testing and Results
    1. 2.1 Efficiency Graph
    2. 2.2 Efficiency Data
    3. 2.3 Thermal Images
    4. 2.4 EMI - Conducted Emissions
    5. 2.5 Bode Plots
  6. 3Waveforms
    1. 3.1 Switching
    2. 3.2 Output Voltage Ripple

EMI - Conducted Emissions

The conducted emissions are tested to be compliant with the CISPR 25 Class 5 standards. The CISPR 25 Class 5 compliance was achieved without a common-mode choke. Figure 2-10 through Figure 2-17 show the waveforms of the EMI test results at 13.5-V input.

where

  • Peak: Peak Detection Result
  • AVG: Average Detection Result
  • PK: CISPR 25 Class 5 Peak Limits
  • AV: CISPR 25 Class 5 Average Limits
GUID-20221109-SS0I-F9JG-8DSM-0N587QCN979L-low.pngFigure 2-10 EMI Performance, VPA_BUS = VPB_BUS = 5 V, IPA_BUS = IPB_BUS = 3 A, Positive Line
GUID-20221109-SS0I-SPJ3-RXLN-PFDCQ9WG5GWD-low.pngFigure 2-11 EMI Performance, VPA_BUS = VPB_BUS = 5 V, IPA_BUS = IPB_BUS = 3 A, Negative Line
GUID-20221109-SS0I-CSVN-FTZV-6W2QJSJVN8R0-low.pngFigure 2-12 EMI Performance, VPA_BUS = VPB_BUS = 9 V, IPA_BUS = IPB_BUS = 3 A, Positive Line
GUID-20221109-SS0I-Z9C5-H2NZ-Q0QXFWFQSW9X-low.pngFigure 2-13 EMI Performance, VPA_BUS = VPB_BUS = 9 V, IPA_BUS = IPB_BUS = 3 A, Negative Line
GUID-20221109-SS0I-KQZX-KTKK-9RLFJGV79HKC-low.pngFigure 2-14 EMI Performance, VPA_BUS = VPB_BUS = 15 V, IPA_BUS = IPB_BUS = 3 A, Positive Line
GUID-20221109-SS0I-8KDS-PKHB-HM93L50S3CXJ-low.pngFigure 2-15 EMI Performance, VPA_BUS = VPB_BUS = 15 V, IPA_BUS = IPB_BUS = 3 A, Negative Line
GUID-20221109-SS0I-N0KF-FRXQ-RWS6ZCS7BR56-low.pngFigure 2-16 EMI Performance, VPA_BUS = VPB_BUS = 20 V, IPA_BUS = IPB_BUS = 3 A, Positive Line
GUID-20221109-SS0I-SJJW-93ZZ-GPDZR5VWSK57-low.pngFigure 2-17 EMI Performance, VPA_BUS = VPB_BUS = 20 V, IPA_BUS = IPB_BUS = 3 A, Negative Line

Table 2-2 shows the margin of each EMI test result.

Table 2-2 EMI Test Result Margins
VIN (V)VOUT (V)Measurement LineMargin (dB)

13.5

5

Positive line

6.39

13.5

5

Negative line

9.84

13.5

9

Positive line

6.02

13.5

9

Negative line

6.56

13.5

15

Positive line

12.8

13.5

15

Negative line

12.63

13.5

20

Positive line

6.67

13.5

20

Negative line

7.21