EPR-54 Datasheet, PDF (17/40 Pages) Power Integrations, Inc. – Engineering Prototype Report for EP 54 - 2.75 W Charger/Adapter Using LNK520P

07-May-2004
EPR-54 – LinkSwitch 2.75 W Low Cost Charger / Adapter
8 Performance Data
All measurements performed at room temperature, 60 Hz input frequency. Output
voltage was measured at the end of the DC output cable. Input power was measured
with a Yokogawa WT120 power meter.
8.1 Efficiency
Efficiency at Full Load - 0.5A
(measured at end of cable)
80%
75%
70%
65%
60%
55%
50%
0
50
100
150
200
250
300
Input Voltage (VAC)
Figure 7 - Efficiency vs. Input Voltage, Room Temperature, 60 Hz.
Efficiency vs. Output Current
(measured at end of cable)
80%
75%
70%
65%
85 VAC
115 VAC
60%
190 VAC
230 VAC
265 VAC
55%
50%
0
0.1
0.2
0.3
0.4
0.5
0.6
Load Current (A)
Figure 8 - Efficiency vs. Output Load, Room Temperature, 60Hz.
Page 17 of 40
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