EPR-33 Datasheet, PDF (28/32 Pages) Power Integrations, Inc. – Engineering Prototype Report for EP 33 - 45 W LCD Monitor External Power Supply using TOP247Y (TOPSwitch-GX)

EPR-33 – 45 W External Adapter Supply
28-Mar-2003
14 AC Surge and 100 kHz Ring Wave Immunity
Four series of line transient tests were performed on the EP-33 to determine the level of
immunity attainable for the basic board. Testing was performed using a Keytek EMC-Pro
surge generator. The input voltage for the supply under test was 230 VAC, and the
supply was resistively loaded to the maximum continuous output power. The UUT
secondary return was hard wired to the surge generator earth connection to simulate use
in an actual system. An LED was used to monitor the presence of output voltage and to
detect output interruptions. The test for each series was terminated upon non-destructive
interruption of output voltage, arcing, or non-recoverable interruption of output voltage. A
test failure was defined as a non-recoverable interruption of output voltage requiring
supply repair or recycling of input AC voltage.
14.1 Common Mode Surge, 1.2/50 µsec
Surge
Voltage
1 kV
1 kV
1 kV
2 kV
2 kV
2 kV
2.5 kV
2.5 kV
2.5 kV
Phase Angle (°)
0
90
270
0
90
270
0
90
270
Generator
Impedance
12 Ω
12 Ω
12 Ω
12 Ω
12 Ω
12 Ω
12 Ω
12 Ω
12 Ω
3 kV
0
12 Ω
3 kV
90
3 kV
270
12 Ω
12 Ω
Number of
Strikes
10
10
10
10
10
10
10
10
10
10
10
10
Test Result
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass (1 interruption/10
strikes, supply recovered)
Pass (1 interruption/10
strikes, supply recovered)
Pass
14.2 Differential Mode Surge, 1.2/50 µsec
Surge
Voltage
1 kV
1 kV
1 kV
2 kV
2 kV
2 kV
3 kV
3 kV
3 kV
4 kV
4 kV
4 kV
Phase Angle (°)
0
90
270
0
90
270
0
90
270
0
90
270
Generator
Impedance
12 Ω
12 Ω
12 Ω
12 Ω
12 Ω
12 Ω
12 Ω
12 Ω
12 Ω
12 Ω
12 Ω
12 Ω
Number of
Strikes
10
10
10
10
10
10
10
10
10
10
10
10
Test Result
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Power Integrations, Inc.
Tel: [phone] Fax: [phone]
www.powerint.com
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