EPR-54 – LinkSwitch 2.75 W Low Cost Charger / Adapter
07-May-2004
9 Waveforms
9.1 Drain Voltage and Current, Normal Operation
Figure 12 - 85 VAC, Full Load.
Upper: IDRAIN, 0.1 A / div.
Figure 13 - 265 VAC, Full Load.
Upper: IDRAIN, 0.1 A / div.
Lower: VDRAIN, 200 V / div, 5 µs / div.
Lower: VDRAIN, 100 V, 5 µs / div.
9.2 Output Voltage Start-up Profile (Battery Load)
The power supply was started up into an output load simulating a battery. Resistor RLOAD
was reduced and confirmed start-up at voltages to 3 V. The battery model included
series resistor value of 2.5 Ω (RLOAD) and internal capacitor resistance of 0.5 Ω (RINT_RES).
The cable resistance RCABLE was set to zero as the load was attached to the end of the
actual output cable.
Figure 14 – Battery load model.
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