EPR-54 – LinkSwitch 2.75 W Low Cost Charger / Adapter
11.5.2 Line and Load Regulation
07-May-2004
V/I Characteristics, Alternate EE16 Transformer
(measured at end of cable)
11
85 VAC
10
9
8
7
6
5
4
3
2
1
0
115 VAC
190 VAC
230 VAC
265 VAC
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
Load Current (A)
Figure 31 – Line and Load Regulation, Alternative EE16 Transformer Design.
11.6 Conducted EMI
Conducted emissions were measured at the peak output power point at worst-case
nominal line voltage, 230 VAC.
Measurements consider both artificial hand (connected to DC output load terminal) and
floating outputs. DC cable harness was included.
The test sample exhibits greater than 10 dBµV margin below composite Quasi-peak and
Average limits. This provides adequate margin to variation in transformer EMI
characteristics. The results show significant attenuation in high frequency emissions.
Composite EN55022B / CISPR22B conducted limits are shown.
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