Delta Electronics S48SE - Manual (Page 5)

DS_S48SE05003_12292006
5
ELECTRICAL CHARACTERISTICS CURVES
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 (200mA/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=3A)(20 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
0
0.6
1.2
1.8
2.4
3
3.6
4.2
4.8
0 1 2 3
OUTPUT CURRENT (A)
OU
TP
U
T
V
O
LT
A
GE
(
V
)
48Vin
4