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QD48T033050 DC-DC Converter Data Sheet
36-75 VDC Input; 3.3VDC @ 15A and 5.0VDC @ 10A Outputs
0.95
0.90
0.85
0.80
0.95
0.90
0.85
0.80
0.75
72 V
48 V
0.75
72 V
48 V
0.70
0.65
36 V
0.70
0.65
36 V
0
2
4
6
8
10
12
14
16
0
2
4
6
8
10
12
14
16
Load Current Iout1 = 1.5·Iout2 [Adc]
Fig. 20: Efficiency vs. balanced load current (Iout1 = 1.5·Iout2)
and input voltage for converter mounted vertically with air flow-
ing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s) and Ta =
25 ° C.
Fig. 22: Turn-on transient waveforms at no load current and
Vin = 48 V, triggered via ON/OFF pin. Top trace: ON/OFF sig-
nal (5 V/div.). Bottom traces: Vout1 (blue, 1 V/div.), Vout2 (red,
1 V/div.). Time scale: 1 ms/div.
Load Current Iout1 = Iout2 [Adc]
Fig. 21: Efficiency vs. balanced load current (Iout1/Iout2 =
const.) and input voltage for converter mounted horizontally
with air flowing from pin 3 to pin 4 at a rate of 300 LFM (1.5
m/s) and Ta = 25 ° C.
Fig. 23: Turn-on transient waveforms at full rated load current
(resistive) and Vin = 48 V, triggered via ON/OFF pin. Top trace:
ON/OFF signal (5 V/div.). Bottom traces: Vout1 (blue, 1 V/div.),
Vout2 (red, 1 V/div.). Time scale: 1 ms/div.
.
MCD10083 Rev. 1.0, 24-Sep-08
Page 12 of 16
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