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SQL48T20033 DC-DC Converter Data Sheet
36-75 VDC Input; 3.3 VDC @ 20A Output
0.95
0.90
10
8
0.85
6
0.80
4
0.75
75 V
65 V
85 C
70 C
0.70
0.65
48 V
36 V
2
0
55C
40 C
0
4
8
12
16
20
24
0
4
8
12
16
20
24
Load Current [Adc]
Figure 5. Efficiency vs. load current and input voltage
converter mounted vertically with air flowing from
pin 3 to pin 1 at 300 LFM (1.5 m/s) and T A = 25 ° C.
0.95
0.90
0.85
0.80
85 C
70 C
Load Current [Adc]
Figure 8. Power dissipation vs. load current and ambient
temperature for 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).
0.75
0.70
55 C
40 C
0
4
8
12
16
20
24
Load Current [Adc]
Figure 6. Efficiency vs. load current and ambient
10
8
6
4
temperature for 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).
75V
65 V
Figure 9. Turn-on waveform at full rated load current (resistive)
with 10,000 uF output capacitor at Vin=48V, triggered
via ON/OFF pin. Top trace: ON/OFF signal (5V/div.).
Bottom trace: Output voltage (1V/div.). Time scale: 2
ms/div.
2
0
48 V
36 V
0
4
8
12
16
20
24
Load Current [Adc]
Figure 7. Power dissipation vs. load current and input
voltage converter mounted vertically with air
flowing from pin 3 to pin 1 at 300 LFM (1.5 m/s) and
T A = 25 ° C.
Figure 10. Turn-on waveform at full rated load current (resistive)
with 10uF tant. + 1uF cer. output capacitor at
Vin=48V, triggered via ON/OFF pin. Top trace:
ON/OFF signal (5V/div.).
Bottom trace: Output
voltage (1V/div.). Time scale: 2 ms/div.
Rev 0.2, 3-Mar-11
www.power-one.com
Page 10 of 14
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