SQ48 Power-One, SQ48 Datasheet - Page 24

• Manufacturer Part Number: SQ48
• Description: Sq48 Dc-dc Series
• Manufacturer: Power-One

SQ48T/S10050 (5.0 Volt Out)
SEP 14, 2005 revised to NOV 06, 2006
Fig. 5.0V.3:
temperature and airflow rates for SQ48S10050 converter
mounted vertically with Vin = 48 V, air flowing from pin 3
to pin 1, and maximum FET temperature ≤ 120 °C.
Fig. 5.0V.5: Efficiency vs. load current and input voltage for
SQ48T/S10050 converter mounted vertically with air
flowing from pin 3 to pin 1 at a rate of 300 LFM (1.5 m/s)
and Ta = 25 °C.
0.95
0.90
0.85
0.80
0.75
0.70
0.65
12
10
8
6
4
2
0
20
0
30
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
30 LFM (0.15 m/s)
2
Available load current vs. ambient air
40
Ambient Temperature [°C]
4
Load Current [Adc]
50
6
60
8
70
10
80
72 V
48 V
36 V
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90
12
36-75 VDC Input; 1.0-12 VDC Output
Fig. 5.0V.4: Available load current vs. ambient air
temperature and airflow rates for SQ48S10050 converter
mounted horizontally with Vin = 48 V, air flowing from pin
3 to pin 1, and maximum FET temperature ≤ 120 °C.
Fig. 5.0V.6: Efficiency vs. load current and ambient
temperature for SQ48T/S10050 converter mounted
vertically with Vin = 48 V and air flowing from pin 3 to pin
1 at a rate of 200 LFM (1.0 m/s).
0.95
0.90
0.85
0.80
0.75
0.70
0.65
12
10
8
6
4
2
0
SQ48 DC-DC Series Data Sheet
20
0
30
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
30 LFM (0.15 m/s)
2
40
Ambient Temperature [°C]
4
Load Current [Adc]
50
6
60
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8
70
10
80
70 C
55 C
40 C
90
12