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, RLOAD = 15 Ω.
Figure 15 – Battery Start-Up Profile, 90 VAC.
Upper: IDRAIN, 0.10 A / div.
Figure 16 – Battery Start-Up Profile, 265 VAC.
Upper: IDRAIN, 0.10 A / div.
Lower: VOUT, 2 V, 50 ms / div.
Lower: VOUT, 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 IDRAIN waveform in Figure 15 is
the leading edge current spike, not IDRAIN at the end of the switching cycle.
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
Page 21 of 32
www.powerint.com
POWERINT [ Power Integrations ]
