Texas Instruments LM25141-Q1, User Manual

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(a) (b)
Start 150 kHz Start 30 MHz Stop 30 MHz Stop 108 MHz
Test Data and Performance Curves
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20 SNVU623B – October 2018 – Revised April 2020
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LM5143-Q1 EVM User's Guide
6.4 Thermal Performance
Figure 24. Thermal Performance, V
IN
= 12 V, I
OUT1
= I
OUT2
= 7 A, Free Convection Airflow
6.5 CISPR 25 EMI Performance
Figure 25 presents the EMI performance of the LM5143-Q1 EVM at 13.5-V input and shields installed.
Conducted emissions are measured over a frequency range of 150 kHz to 108 MHz using a 5-µH LISN
according to the CISPR 25 specification. CISPR 25 class 5 peak and average limit lines are denoted in
red. The yellow and blue spectra are measured using peak and average detection, respectively.
Figure 25. CISPR 25 Class 5 Conducted Emissions Plot, 150 kHz to 30 MHz, V
IN
= 13.5 V, I
OUT1
= I
OUT2
= 7 A
Resistive, (a) 150 kHz to 30 MHz, (b) 30 MHz to 108 MHz