Delta Electronics Series H48SA - Manual (Page 6)

DS_H48SA12025_05052008
ELECTRICAL CHARACTERISTICS CURVES
Figure 13: Input Terminal Ripple Current, i
c
, at nominal input
voltage and rated load current with 12µH source impedance
and 100µF electrolytic capacitor, 500 mA/div, 2us/div.
Figure 14: Input reflected ripple current, i
s
, through a 12µH
source inductor at nominal input voltage and rated load current,
20 mA/div, 2us/div.
Vo(-)
Vo(+)
10u 1u
Copper Strip
SCOPE RESISTIVE
LOAD
Figure 15: Output voltage noise and ripple measurement
test setup
Figure 16: Output voltage ripple at nominal input voltage and
rated load current, 50mV/div, 2us/div. Load capacitance: 1µF
ceramic capacitor and 10µF tantalum capacitor. Bandwidth: 20
MHz. Scope measurement 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.
0
2
4
6
8
10
12
0 5 10 15 20 25 30 35
Output Current (A)
O
u
tput
V
o
ltage (
V
)
Figure 17: Output voltage vs. load current showing typical
current limit curves and converter shutdown points.
6
0 0
0