Delta Electronics Q48SR - Manual (Page 4)

ELECTRICAL CHARACTERISTICS CURVES
80
82
84
86
88
90
92
94
1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.3
OUTPUT VOLTAGE (V)
E
FFICIE
NCY
(%)
36Vin 48Vin 75Vin
10.0
12.0
14.0
16.0
18.0
20.0
22.0
24.0
1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.3
OUTPUT VOLTAGE (V)
POW
E
R
D
ISSIPATION
(
W
)
36Vin 48Vin 75Vin
Figure 5: Efficiency vs. output voltage for minimum, nominal, and
maximum input voltage at 25°C. (Iout=50A) Figure 6: Power dissipation vs. output voltage for minimum,
nominal, and maximum input voltage at 25°C. (Iout=50A)
0.0
1.0
2.0
3.0
4.0
5.0
6.0
30 35 40 45 50 55 60 65 70 75
INPUT VOLTAGE (V)
INP
U
T CURRE
N (A
)
Io=50A Io=30A Io=5A
Figure 7: Typical input characteristics at room temperature Figure 8: Turn-on transient at full rated load current (resistive
load) (5 ms/div). Top Trace: Vout; 1V/div; Bottom Trace:
ON/OFF input: 2V/div
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