5 W Universal Input Dual Output Isolated TNY266

03-April-2001

8.6 Conducted EMI Scans

The attached plots show worst-case EMI performance for EP8 as compared to CISPR22B conducted

emissions limits. Peak detection is commonly used for initial diagnosis of EMI, as full frequency range

results can be quickly obtained, using a common spectrum analyzer. This is also a worst-case form of

analysis, as the CISPR22B limits are based on quasi-peak and average detection, both of which give lower

amplitude results than peak detection.

For EMI and safety techniques refer to PI application note AN15 (Figure 6 shows a typical test set up).

Quasi-peak

Average

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