DER-96

10 W VoIP

September 12, 2005

Page 30 of 33

CONFIDENTIAL

Power Integrations

Tel: +1 408 414 9200 Fax: +1 408 414 9201

www.powerint.com

12 Conducted EMI

EMI was tested at room temperature and at 230 VAC input. An AC-DC (48 V output)

adapter was plugged into the LISN (AC-output). The DC-DC converter (using DPA423

was plugged into the 48 VDC output from the AC-DC adapter.

In some tests the output of the DC-DC converter was left floating and in other cases the

output (0 VDC) was connected to Earth ground.

12.1 230V High Line EMI

Figure 27 – 230 VAC - N1 - full system grounded

output - full-load

Figure 28 – 230 VAC - L1 - full system grounded

output - full-load

Figure 29 – 230 VAC - N1 - full system floating

output - full-load

Figure 30 – 230 VAC - L1 - full system floating

output - full-load