Input:
Outputs:
Current:
Package:
35-75V
5.0V & 3.3V
40W
Quarter-brick
Technical Specification
9
8
7
6
5
4
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
0 LFM (0 m/s)
3
2
1
0
Semiconductor junction temperature is
within 1 C of surface temperature
0
25
40
55
70
85
°
Ambient Air Temperature (oC)
Figure 13: Maximum output power-derating curves vs. ambient air tem-
perature for airflow rates of 0 to 400 LFM, air flowing from pin 3 to pin
1. Full load (8A) on 5.0V output and no load on 3.3V output.
Figure 14: Thermal plot of converter at 8 amp load on 5.0V ouput and
no load on 3.3V output with 55°C air flowing at 200 LFM. Air flow
across the converter is from pin 3 to pin 1 (nominal input voltage)
7
6
5
4
3
400 LFM (2.0 m/s)
2
1
0
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
0 LFM (0 m/s)
Semiconductor junction temperature is
within 1°C of surface temperature
0
25
40
55
70
85
Ambient Air Temperature (oC)
Figure 15: Max output power-derating curves vs. air temp for 0 - 400 LFM, pin
3 to pin 1. 50% load (6A) on 3.3V output and 50% load (4A) on 5.0V output. At
derating points, 3.3V output decreases while 5.0V output remains unchanged.
Figure 16: Thermal plot of converter at 6 amp load on 3.3V ouput and
4 amp load on 5.0V output with 70°C air flowing at 200 LFM. Air flow
across the converter is from pin 3 to pin 1 (nominal input voltage)
9
8
7
6
5
4
3
2
1
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)
0 LFM (0 m/s)
Semiconductor junction temperature is
within 1°C of surface temperature
0
25
40
55
70
85
Ambient Air Temperature (oC)
Figure 17: Max output power derating curves vs. air temp for 0 to 400 LFM, pin
3 to pin 1. 70% load (8.5A) on 3.3V output and 30% load (2.4A) on 5.0V output.
At derating points, 3.3V output decreases while 5.0V output remains unchanged.
Figure 18: Thermal plot of converter at 8.5 amp load on 3.3V ouput and
2.4 amp load on 5.0V output with 55 C air flowing at 200 LFM. Air
flow across the converter is from pin 3 to pin 1 (nominal input voltage).
°
Product # DQ65033QKA04
Phone 1-888-567-9596
Doc.# 005-2DQ653L Rev. B 11/11/04 Page 7
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