Technical Specification
100
95
5
Input:
Outputs:
Current:
Package:
35-75V
5.0V & 3.3V
40W
Quarter-brick
Power Dissipation (W)
90
4
3
2
1
0
35 Vin
48 Vin
75 Vin
Efficiency (%)
85
80
75
70
65
60
0
4
8
12
16
20
24
28
32
36
40
35 Vin
48 Vin
75 Vin
0
4
8
12
16
20
24
28
32
36
40
Total Output Power (W)
Total Output Power (W)
Figure 1:
Efficiency vs. output power, from 0 load to full load with 50%
load on 3.3V output and 50% load on 5.0V output at minimum, nominal,
and maximum input voltage at 25
°
C.
100
95
90
Figure 2:
Power dissipation vs. output power, from 0 load to full load
with 50% load on 3.3V output and 50% load on 5.0V output at mini-
mum, nominal, and maximum input voltage at 25
°
C.
5.0
4.5
Power Dissipation (W)
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
7.3/0
5.8/1
4.4/1.9
2.9/2.9
1.5/3.9
35 Vin
48 Vin
75 Vin
0/4.8
Efficiency (%)
85
80
75
70
65
7.3/0
35 Vin
48 Vin
75 Vin
5.8/1
4.4/1.9
2.9/2.9
1.5/3.9
0/4.8
Load Current (A), 3.3Vout/5.0Vout
Load Current (A), 3.3Vout/5.0Vout
Figure 3:
Efficiency vs. load current, with total output power fixed at
100% load (40W) and load currents split as shown between 3.3V and
5.0V outputs at minimum, nominal, and maximum input voltage at 25
°
C.
93
92
Efficiency (%)
Figure 4:
Power dissipation vs. load current, with total output power
fixed at 100% load (40W) and load currents split as shown between 3.3V
and 5.0V outputs at minimum, nominal, and max input voltage at 25
°
C.
5
91
90
89
88
87
0
100
200
300
400
Air Flow (LFM)
25 C
40 C
55 C
Power Dissipation (W)
4
3
2
1
0
0
100
200
300
400
Air Flow (LFM)
25 C
40 C
55 C
500
500
Figure 5:
Efficiency at 100% load and 50/50 voltage split (6.1A load on
3.3V and 4A load on 5.0V) versus airflow rate for ambient air tempera-
tures of 25
°
C, 40
°
C.and 55
°
C.(nominal input voltage).
Product # DQ65033QKA04
Phone 1-888-567-9596
Figure 6:
Power dissipation at 100% load and 50/50 voltage split (6.1A
load on 3.3V and 4A load on 5.0V) versus airflow rate for ambient air
temperatures of 25
°
C, 40
°
C.and 55
°
C.(nominal input voltage).
Doc.# 005-2DQ653L Rev. B
11/11/04
Page 5
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