Delta Electronics Delphi Series V48SR Datasheet page 5

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
possible battery impedance. Measure current as shown above
Figure 12: Input reflected ripple current, i
source inductor at nominal input voltage and rated load current
(20 mA/div, 1us/div)
Figure 14: Output voltage ripple at nominal input voltage and
rated load current (Io=4.4A)(50 mV/div, 1us/div)
Load capacitance: 1µF ceramic capacitor and 10µF tantalum
capacitor. Bandwidth: 20 MHz. Scope measurements should be
made using a BNC cable (length shorter than 20 inches).
Position the load between 51 mm to 76 mm (2 inches to 3
inches) from the module.
DS_V48SR15004_06122007
) of 12 µH. Capacitor Cs offset
, through a 12µH
s
Figure 11: Input Terminal Ripple Current, i
current and nominal input voltage with 12µH source impedance
and 33µF electrolytic capacitor (200 mA/div, 1us/div)
Copper Strip
Vo(+)
10u
Vo(-)
Figure 13: Output voltage noise and ripple measurement test
setup
Figure 15: Output voltage vs. load current showing typical
current limit curves and converter shutdown points
, at full rated output
c
SCOPE RESISTIV
1u
LOAD
5