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Electromagnetic Interference (EMI)

13.2 Power Factor Performance

The LED driver is able to achieve close to unity power factor (P.F. ~ 0.99) which meets Energy Star

requirements. This design also exhibits low current harmonics as a percentage of the fundamental current

(as shown in Figure 17) and therefore meets the requirements of the IEC 61000-3-2 Class-3 standard.

Figure 17. Current Harmonic Performance vs. EN/IEC61000-3-2 Class C Limits

14 Electromagnetic Interference (EMI)

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

Figure 18. Input EMI Filter and Rectifier Circuit

SNVA454E–September 2010–Revised May 2013 AN-2082 LM3444 -120VAC, 8W Isolated Flyback LED Driver

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