Delta Electronics Q48DC - Manual (Page 6)

DS_Q48DC12003_03112008 6
ELECTRICAL CHARACTERISTICS CURVES
Figure 10: Test set-up diagram showing measurement points
for Input Terminal Ripple Current and Input Reflected Ripple
Current.
Note: Measured input reflected-ripple current with a simulated
source Inductance (L
TEST
) of 12 μH. Capacitor Cs offset
possible battery impedance. Measure current as shown above.
Figure 11: Input Terminal Ripple Current, ic, at full rated output
current and nominal input voltage with 12 µ H source impedance
and 33 µ F electrolytic capacitor (500 mA/div).
Figure 12: Input reflected ripple current, is, through a 12 µ H
source inductor at nominal input voltage and rated load current
(20 mA/div).