Data Sheet
February 16, 2009
QSW025A0B Series Power Modules; DC-DC Converters
36 – 75Vdc Input; 12Vdc Output; 25A Output Current
Characteristic Curves
The following figures provide typical characteristics for the QSW025A0B (12V, 25A) at 25ºC. The figures are identical
for either positive or negative Remote On/Off logic.
10
9
8
7
Iout=25A
Iout=12.5A
6
5
4
3
2
Iout=0A
1
0
30
35
40
45
50
55
60
65
70
75
INPUT VOLTAGE, VO (V)
Figure 1. Typical Input Characteristic at Room
Temperature.
TIME, t (20 ms/div)
Figure 4. Typical Start-Up Using Remote On/Off,
negative logic version shown.
100
95
Vin=75V
90
Vin=48V
Vin=36V
85
80
75
0
5
10
15
20
25
OUTPUT CURRENT, IO (A)
TIME, t (500 μs/div)
Figure 2. Typical Converter Efficiency Vs. Output
current at Room Temperature.
Figure 5. Typical Transient Response to Step change
in Load from 25% to 50% to 25% of Full Load at Room
Temperature and 48 Vdc Input.
36 Vin
48 Vin
60 Vin
TIME, t (500 μs/div)
TIME, t (1μs/div)
Figure 3. Typical Output Ripple and Noise at Room
Temperature and Io = Io,max
Figure 6. Typical Transient Response to Step Change
in Load from 50% to 75% to 50% of Full Load at Room
Temperature and 48 Vdc Input.
.
LINEAGE POWER
5
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
