SQ48 Power-One, SQ48 Datasheet - Page 54

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

SQ48T/S15012 (1.2 Volt Out)
SEP 14, 2005 revised to NOV 06, 2006
Fig. 1.2V.3:
temperature and airflow rates for SQ48S15012 converter
mounted vertically with Vin = 48 V, air flowing from pin 3
to pin 1, and maximum FET temperature ≤ 120 °C.
Fig. 1.2V.5: Efficiency vs. load current and input voltage for
SQ48T/S15012 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.
0.90
0.85
0.80
0.75
0.70
0.65
0.60
20
15
10
5
0
20
0
30
2
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)
Available load current vs. ambient air
4
40
Ambient Temperature [°C]
Load Current [Adc]
6
50
8
60
10
70
12
80
14
72 V
48 V
36 V
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90
16
36-75 VDC Input; 1.0-12 VDC Output
Fig. 1.2V.4: Available load current vs. ambient air
temperature and airflow rates for SQ48S15012 converter
mounted horizontally with Vin = 48 V, air flowing from pin
3 to pin 1, and maximum FET temperature ≤ 120 °C.
Fig. 1.2V.6: Efficiency vs. load current and ambient
temperature for SQ48T/S15012 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).
0.90
0.85
0.80
0.75
0.70
0.65
0.60
20
15
10
5
0
SQ48 DC-DC Series Data Sheet
20
0
30
2
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)
4
40
Ambient Temperature [°C]
Load Current [Adc]
6
50
8
60
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10
70
12
80
70 C
55 C
40 C
14
90
16