Input:
35-75 V
Output:
12 V
Current:
4 A
Package:
Eighth-brick
Technical Specification
95
90
85
80
75
70
65
60
92.0
91.5
91.0
90.5
90.0
89.5
89.0
88.5
88.0
25 C
40 C
55 C
35 Vin
48 Vin
75 Vin
0
100
200
300
400
500
0.0
0.4
0.8
1.3
1.7
2.1
2.5
2.9
3.3
3.8
4.2
Air Flow (LFM)
Load Current (A)
Figure 1: Efficiency at nominal output voltage vs. load current for min-
Figure 2: Efficiency at nominal output voltage and 60% rated power vs.
imum, nominal, and maximum input voltage at 25
°C.
airflow rate for ambient air temperatures of 25
(nominal input voltage).
°C, 40°C, and 55°C
7
6
5
4
3
2
1
0
5.0
4.5
4.0
3.5
3.0
2.5
2.0
25 C
40 C
55 C
35 Vin
48 Vin
75 Vin
0
100
200
300
400
500
0.0
0.4
0.8
1.3
1.7
2.1
2.5
2.9
3.3
3.8
4.2
Air Flow (LFM)
Load Current (A)
Figure 3: Power dissipation at nominal output voltage vs. load current
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).
for minimum, nominal, and maximum input voltage at 25
°C.
°
°
°
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
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)
Semiconductor junction temperature is
within 1 C of surface temperature
0
25
40
55
70
85
°
Ambient Air Temperature (oC)
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).
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).
°
Product # PQ60120EML04
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2EM612E Rev. C
04/25/06
Page 5
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