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QL48T30012 DC-DC Converter Data Sheet
36-75 VDC Input; 1.2 VDC @ 30A Output
35
30
25
20
35
30
25
20
15
10
5
0
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)
30 LFM (0.15 m/s)
15
10
5
0
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)
30 LFM (0.15 m/s)
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
Fig. 9: Available load current vs. ambient air temperature and
airflow rates for converter mounted vertically with Vin = 54 V,
air flowing from pin 3 to pin 1 and maximum FET temperature ≤
120 ° C.
35
30
25
20
Ambient Temperature [°C]
Fig. 10: Available load current vs. ambient air temperature and
airflow rates for converter mounted vertically with Vin = 54 V,
air flowing from pin 3 to pin 1 and maximum FET temperature ≤
105 ° C.
35
30
25
20
15
10
5
0
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)
30 LFM (0.15 m/s)
15
10
5
0
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)
30 LFM (0.15 m/s)
20
30
40
50
60
70
80
90
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
Fig. 11: Available load current vs. ambient temperature and
airflow rates for converter mounted horizontally with Vin = 54
V, air flowing from pin 3 to pin 4 and maximum FET tempera-
ture ≤ 120 ° C.
Ambient Temperature [°C]
Fig. 12: Available load current vs. ambient temperature and
airflow rates for converter mounted horizontally with Vin = 54
V, air flowing from pin 3 to pin 4 and maximum FET tempera-
ture ≤ 105 ° C.
MAR 26, 2003 revised to NOV 13, 2006
Page 10 of 14
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