EPR-85 Datasheet, PDF (21/32 Pages) Power Integrations, Inc. – Engineering Prototype Report for EP 85 - 2 W Charger using LinkSwitch-LP

04-Oct-2005
EP-85 6 V, 330 mA Low Cost Charger
10.2 Output Voltage Start-Up Profile, Battery Load
A simulated battery load was used to verify the power supply start-up profile.
Figure 14 – Battery Output Load, R_LOAD = 15 Ω.
Figure 15 – Battery Start-Up Profile, 90 VAC.
Upper: I_DRAIN, 0.10 A / div.
Lower: V_OUT, 2 V, 50 ms / div.
Figure 16 – Battery Start-Up Profile, 265 VAC.
Upper: I_DRAIN, 0.10 A / div.
Lower: V_OUT, 2 V, 50 ms / div.
With a simulated battery load, the output voltage reaches regulation within 200 ms. No
output overshoot is observed. Note that the peak of the I_DRAIN waveform in Figure 15 is
the leading edge current spike, not I_DRAIN at the end of the switching cycle.
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