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SQE48T50012 DC-DC Converter
36-75 VDC Input; 1.2 VDC @ 50 A Output
Data Sheet
15
12
9
6
36V
3
48V
65V
72V
0
0 10 20 30 40 50
Load Current, A
Figure 4. Power dissipation vs. load current and input
voltage for SQE48T50012 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.
12
9
6
40C
Figure 7. Turn-on transient at full rated load current
(resistive) plus 10,000 μF at Vin = 48 V, triggered
via ON/OFF pin. Top trace: ON/OFF signal (5
V/div.). Bottom trace: Output voltage (0.5 V/div.).
Time scale: 5 ms/div.
3
55C
70C
0
0
10
20 30
Load Current, A
40
50
Figure 8. Output voltage response to load current step-
change (25 A – 37.5 A – 25 A) at Vin = 48 V. Top
trace: output voltage (20 mV/div.). Bottom trace:
Figure 5. Power dissipation vs. load current and ambient
temperature for SQE48T50012 converter mounted
load current (10 A/div.). Current slew rate: 0.1 A/μs.
Co = 1 μF ceramic. Time scale: 0.2ms/div.
vertically with Vin = 48 V and air flowing from pin 3
to pin 1 at a rate of 200 LFM (1.0 m/s).
Figure 9. Output voltage response to load current step-
change (25 A – 37.5 A – 25 A) at Vin = 48 V. Top
Figure 6. Turn-on transient at full rated load current
(resistive) with no output capacitor at Vin = 48 V,
triggered via ON/OFF pin. Top trace: ON/OFF
signal (5 V/div.). Bottom trace: Output voltage (0.5
V/div.). Time scale: 5 ms/div.
trace: output voltage (100 mV/div.). Bottom trace:
load current (10 A/div.). Current slew rate: 2.5 A/μs.
Co = 470 μF POS + 1 μF ceramic. Time scale: 0.2
ms/div.
ZD-01731 Rev 2.0
www.power-one.com
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