User manual

LINE

NEUTRAL

V+

VR1

RT1

C4 C5

R12

INPUT EMI FILTER AND RECTIFIER

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Electromagnetic Interference (EMI)

15 Electromagnetic Interference (EMI)

The EMI input filter of this evaluation board is configured as shown in the following circuit diagram.

Figure 20. Input EMI Filter and Rectifier Circuit

In order to get a quick estimate of the EMI filter performance, only the PEAK conductive EMI scan was

measured and the data was compared to the Class B conducted EMI limits published in FCC – 47, section

15.

CISPR 15 compliance pending

Figure 21. Peak Conductive EMI scan per CISPR-22, Class B Limits

SNVA462F–November 2010–Revised May 2013 AN-2097 LM3444 - 230VAC, 8W Isolated Flyback LED Driver

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