17-May-04
EPR-16 – LinkSwitch 2.75 W Charger/Adapter
11.5 EMI Performance
No change in conducted EMI performance was measured. The results of the LNK520P
and modified EP-16 were the same as the original EP-16 design, as shown in Figures 24
and 25.
However, the optimized switching characteristics of LNK520P produced a significant
reduction in radiated EMI. Figure 34 provides a comparison of quasi-peak radiated
emissions with the original EP-16 (LNK501P) and modified EP-16 (LNK520P) designs.
A 6 dBµV to 12 dBµV reduction is shown with the LNK520P device. The results are
shown as a comparative reference. Actual radiated emissions levels will vary according
to radiated test setup and measurement configurations.
LNK520P (modified EP-16)
LNK501P (EP-16)
Figure 34 – Comparison of Radiated Emissions, VIN = 230 VAC, 60 Hz Line, Peak Power Point.
Power Integrations
Page 33 of 36
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