Data Sheet
QPW050/060 Series Power Modules; DC-DC converters
36-75Vdc Input; 1.2Vdc to 3.3Vdc Output
March 27, 2008
Characteristic Curves
The following figures provide typical characteristics for the QPW050A0F (3.3V, 50A) at 25ºC. The figures are identical
for either positive or negative Remote On/Off logic.
6
Io = 50 A
5
Io = 25 A
4
Io = 0 A
3
2
1
0
INPUT VOLTAGE, VO (V)
TIME, t (5 ms/div)
25
35
45
55
65
75
Figure 1. Typical Input Characteristic at Room
Temperature.
Figure 4. Typical Start-Up Using Remote On/Off,
negative logic version shown.
94
92
90
88
Vi = 36 V
Vi = 48 V
Vi = 75 V
86
84
82
80
0
10
20
30
40
50
OUTPUT CURRENT, IO (A)
TIME, t (100 μs/div)
Figure 2. Typical Converter Efficiency Vs. Output
current at Room Temperature.
Figure 5. Typical Transient Response to Step
change in Load from 50% to 25% of
Full Load at Room Temperature and 48
Vdc Input.
75 Vin
48 Vin
36 Vin
TIME, t (100 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% of Full Load at Room
Temperature and 48 Vdc Input.
.
LINEAGE POWER
6
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
