Performance Curves
Brick
Eighth
48V 5.0V
10A
out
in
92
91
90
89
88
87
86
85
95
90
85
80
75
70
65
60
25 C
40 C
55 C
35 Vin
48 Vin
75 Vin
84
0
0
1
2
3
4
5
6
7
8
9
10
100
200
300
400
500
Load Current (A)
Air Flow (LFM)
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
8
7
6
5
4
3
2
1
0
5.0
4.0
3.0
2.0
1.0
0.0
25 C
40 C
55 C
35 Vin
48 Vin
75 Vin
0
1
2
3
4
5
6
7
8
9
10
0
100
200
300
400
500
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.
°
°
°
10
9
8
7
6
5
4
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
3
2
1
0
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 5: Maximum output power derating curves vs. ambient air tem-
perature for airflow rates of 0 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 10 amp load current with 55°C
air flowing at the rate of 200 LFM. Air is flowing across the converter
sideways from pin 3 to pin 1 (nominal input voltage).
Product # PQ60050EML10
Phone 1-888-567-9596
Doc.# 005-2EM650E Rev. A
5/22/03
Page 5
SYNQOR [ SYNQOR WORLDWIDE HEADQUARTERS ]
