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QM48T45 Family DC-DC Converter Data Sheet
36-75 VDC Input; 1.0-3.3 VDC @ 45 A Output
QM48T45033 (3.3 Volt Out)
0.95
0.90
0.85
0.80
0.95
0.90
0.85
0.80
0.75
72 V
48 V
0.75
70 C
55 C
0.70
0.65
36 V
0.70
0.65
40 C
0
10
20
30
40
50
0
10
20
30
40
50
Load Current [Adc]
Fig. 3.3V.3: Efficiency vs. load current and input voltage
for converter mounted vertically with air flowing from pin 3
to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta = 25 ° C.
20.00
16.00
12.00
8.00
Load Current [Adc]
Fig. 3.3V.4: Efficiency vs. load current and ambient
temperature for converter mounted vertically with
Vin = 48 V and air flowing from pin 3 to pin 1 at a rate of
200 LFM (1.0 m/s).
20.00
16.00
12.00
8.00
4.00
72 V
48 V
36 V
4.00
70 C
55 C
40 C
0.00
0
10
20
30
40
50
0.00
0
10
20
30
40
50
Load Current [Adc]
Fig. 3.3V.5: Power dissipation vs. load current and input
voltage for converter mounted vertically with air flowing
from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and
Ta = 25 ° C.
Load Current [Adc]
Fig. 3.3V.6: Power dissipation vs. load current and
ambient temperature for converter mounted vertically
with Vin = 48 V and air flowing from pin 3 to pin 1 at a
rate of 200 LFM (1.0 m/s).
MCD10073 Rev. 1.0
Page 9 of 36
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