Delta Electronics Delphi Series S48SS Datasheet page 4

ELECTRICAL CHARACTERISTICS CURVES
Turn-on transient at zero load current (10 ms/div). Top
Figure5
:
Trace: Vout (5V/div); Bottom Trace: ON/OFF Control (2V/div).
s i
12uH
Cs:68uF/100V
ESR< 0.3
20
﹫
Test set-up diagram showing measurement points for
Figure 7
:
Input Reflected Ripple Current (Figure 8).
Note: Measured input reflected-ripple current with a simulated
source Inductance (L
battery impedance.
DS_s48SS12001_06082006
TEST
68uF/100V
ESR< 0.3
Ω Ω
100KHz 20 ℃ 100KHz
℃ ﹫
) of 12 µH. Capacitor Cs offset possible
TEST
Figure 6: Output voltage response to step-change in load
current (50%-75%-50% of Io, max; di/dt = 0.1A/µs). Load
cap: 10µF, 100 m
ceramic capacitor. Top Trace: Vout (50mV/div), Bottom
Trace: Iout (0.5A/div).
Vi(+)
Vi(-)
Figure 8: Input Reflected Ripple Current, i s , at full rated
output current and nominal input voltage with 12µH source
impedance and 68µF electrolytic capacitor (2 mA/div)
Ω
 E SR tantalum capacitor and 1µF
4