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DER-96 датащи(PDF) 31 Page - Power Integrations, Inc.

номер детали DER-96
подробное описание детали  10 W Power Supply using DPA423P
PDF  33 Pages
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производитель  POWERINT [Power Integrations, Inc.]
домашняя страница  http://www.powerint.com
Logo POWERINT - Power Integrations, Inc.

DER-96 датащи(HTML) 31 Page - Power Integrations, Inc.

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DER-96
10 W VoIP
September 12, 2005
Page 31 of 33
CONFIDENTIAL
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
13 Radiated EMI scans
As can be seen from the radiated EMI scans below, the new board performs extremely
well compared to the original DPA423 power supply. This is because of optimal layout
and power supply filtering (including transformer shielding design).
The measurements were made in an open-field test site, with the AC-adapter (which
outputs 48 VDC). This AC-adapter was connected to 115 VAC via a LISN and the output
48 VDC was input to the DPA423 DC-DC converter.
Local baseline
radio interferance
Figure 31 – Radiated no-power Baseline
Figure 32 – Original board with DPA423 and AC-
adapter (230 VAC) – Output Floating
Figure 33 – New prototype board using DPA423 and
AC-adapter (230 VAC) – Output Floating
Figure 34 – New prototype board using DPA423 and
AC-adapter (230 VAC) – Output Hard Grounded



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