SQE48T40025 DC-DC Converter Data Sheet
36-75 VDC Input; 2.5 VDC @ 40A Output
The input reflected-ripple current waveforms are
obtained using the test setup shown in Figure 11. The
45
40
35
30
25
corresponding waveforms are shown in Figure 12 and
Figure 13.
20
15
10
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
NC - 30 LFM (0.15 m/s)
5
0
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
Figure 1. Available load current vs. ambient air temperature and airflow rates for SQE48T40025 converter mounted vertically with air
flowing from pin 3 to pin 1, MOSFET temperature ? 120 ? C, Vin = 48 V.
Note: NC – Natural convection
0.95
0.90
0.85
72 V
0.95
0.90
0.85
70 C
0.80
0.75
48 V
36 V
0.80
0.75
55 C
40 C
0
8
16
24
32
40
48
0
8
16
24
32
40
48
Load Current [Adc]
Figure 2. Efficiency vs. load current and input voltage for
SQE48T40025 converter mounted vertically with air flowing
from pin 3 to pin 1 at 300 LFM (1.5 m/s) and Ta=25 ? C.
Load Current [Adc]
Figure 3. Efficiency vs. load current and ambient temperature
for SQE48T40025 converter mounted vertically with Vin=48V
and air flowing from pin 3 to pin 1 at 200LFM (1.0m/s).
ZD-01723 Rev 1.2, 04-Jan-10
www.power-one.com
Page 10 of 13
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