Technical Specification
95
90
85
92.0
91.5
91.0
Input:
Output:
Current:
Package:
35-75 V
12 V
4A
Eighth-brick
Efficiency (%)
Efficiency
(%)
80
75
70
35 Vin
65
60
0.0
0.4
0.8
1.3
1.7
2.1
2.5
2.9
3.3
3.8
4.2
48 Vin
75 Vin
90.5
90.0
89.5
89.0
88.5
88.0
0
100
200
300
400
500
25 C
40 C
55 C
Load Current (A)
Air Flow
(LFM)
Figure 1:
Efficiency at nominal output voltage vs. load current for min-
imum, 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).
7
6
5.0
4.5
Power Dissipation (W)
4.0
3.5
3.0
2.5
2.0
0.0
0.4
0.8
1.3
1.7
2.1
2.5
2.9
3.3
3.8
4.2
Power Dissipation (W)
5
4
3
2
1
0
35 Vin
48 Vin
75 Vin
25 C
40 C
55 C
0
100
200
300
400
500
Load Current (A)
Air Flow (LFM)
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).
4.5
4.0
3.5
3.0
I
out
(A)
2.5
2.0
1.5
1.0
0.5
0.0
0
25
40
55
o
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)
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 tem-
perature 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 # PQ60120EML04
Phone 1-888-567-9596
Figure 6:
Thermal plot of converter at 4.2 amp load current (50W) with
55
°
C air flowing at the rate of 200 LFM. Air is flowing across the con-
verter from pin 3 to pin 1 (nominal input voltage).
Doc.# 005-2EM612E Rev. C
04/25/06
Page 5
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