Delta Electronics Q48DC - Manual (Page 7)

DS_Q48DC12003_03112008 7
ELECTRICAL CHARACTERISTICS CURVES
Vo(-)
Vo(+)
10u 1u
Copper Strip
SCOPE RESISTIV
LOAD
Figure 13: Output voltage noise and ripple measurement
test setup.
Figure 14: Output voltage ripple at nominal input voltage
(Vin=48V) and rated load current (Io1=Io2=2.7A,20 mV/div). Load
capacitance: 1µF ceramic capacitor and 10µF tantalum capacitor.
Bandwidth: 20 MHz. (See Figure 13). Scope measurement should
be made using a BNC cable (length short than 20 inch). Position
the load between 51 mm and 76 mm (2inch and 3 inch) from the
module.
0
1
2
3
4
5
6
7
8
9
10
11
12
13
0 1 2 3 4 5 6 7 8 9
LOAD CURRENT(A)
O
U
T
P
U
T
V
O
LT
AG
E(
V
)
1
Figure 15: Output voltage vs. load current showing typical
current limit curves and converter shutdown points.