Technical Specification
100
95
90
92
94
Input:
Output:
Current:
Package:
35-75 V
5.0 V
30 A
Quarter-brick
93
Efficiency (%)
85
80
75
70
65
0
5
10
15
Load Current (A)
20
25
30
Efficiency (%)
91
90
35 Vin
48 Vin
75 Vin
89
25 C
40 C
55 C
88
0
100
200
300
400
500
Air Flow (LFM)
Figure 1:
Efficiency at nominal output voltage vs. load current for
minimum, nominal, and maximum input voltage at 25°C.
Figure 2:
Efficiency at nominal output voltage and 60% rated power vs.
airflow rate for ambient air temperatures of 25°C, 40°C, and 55°C (nominal
input voltage).
10.0
18
16
9.0
14
Power Dissipation (W)
12
10
8
6
4
2
0
0
5
10
15
Load Current (A)
20
25
30
Power Dissipation (W)
8.0
7.0
6.0
35 Vin
48 Vin
75 Vin
25 C
5.0
40 C
55 C
4.0
0
100
200
300
Air Flow (LFM)
400
500
Figure 3:
Power dissipation at nominal output voltage vs. load current for
minimum, nominal, and maximum input voltage at 25°C.
Figure 4:
Power dissipation at nominal output voltage and 60% rated
power vs. airflow rate for ambient air temperatures of 25°C, 40°C, and
55°C (nominal input voltage).
30
25
20
I
out
(A)
15
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
50 LFM (0.25 m/s)
10
5
0
0
25
40
55
o
70
85
Ambient Air Temperature ( C)
Semiconductor junction temperature is
within 1°C of surface temperature
Figure 5:
Maximum output power derating curves vs. ambient air
temperature for airflow rates of 50 LFM through 400 LFM with air flowing
across the converter from pin 3 to pin 1 (nominal input voltage).
Product # PQ60050QTA30
Phone 1-888-567-9596
Figure 6:
Thermal plot of converter at 29 amp load current (145W)
with 55°C air flowing at the rate of 200 LFM. Air is flowing across the
converter from pin 3 to pin 1 (nominal input voltage).
Doc.# 005-2QT650C Rev. E
05/20/09
Page 5
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