Delta Electronics Delphi Series V48SR - Manual (Page 5)

DS_V48SR15004_06122007 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
) of 12 µH. Capacitor Cs offset
possible battery impedance. Measure current as shown above
Figure 11: Input Terminal Ripple Current, i
c
, at full rated output
current and nominal input voltage with 12µH source impedance
and 33µF electrolytic capacitor (200 mA/div, 1us/div)
Figure 12: Input reflected ripple current, i
s
, through a 12µH
source inductor at nominal input voltage and rated load current
(20 mA/div, 1us/div)
Figure 13: Output voltage noise and ripple measurement test
setup
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. Figure 15: Output voltage vs. load current showing typical
current limit curves and converter shutdown points
Strip Copper
Vo(-)
Vo(+)
10u 1u
SCOPE RESISTIV
LOAD