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SSQE48T25018 DC-DC Converter
36-75 VDC Input; 1.8 VDC, 25 A Output
Data Sheet
10
8
6
4
2
36V
48V
65V
72V
0
0
5
10
15
20
25
Load Current, A
Figure 7.
Turn-on transient at full rated load current
Figure 4.
10
8
6
4
2
Power dissipation vs. load current and input
voltage for SSQE48T25018 converter mounted
vertically with air flowing from pin 1 to pin 3at a
rate of 300 LFM (1.5 m/s) and Ta = 25 ° C.
40C
55C
70C
(resistive) plus 30,000 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.
85C
0
0
5
10
15
20
25
Load Current, A
Figure 8.
Output voltage response to load current step-
Figure 5.
Power dissipation vs. load current and ambient
temperature for SSQE48T25018 converter
mounted vertically with Vin = 48 V and air flowing
from pin 1 to pin 3at a rate of 200 LFM (1.0 m/s).
change (12.5A–18.75A–12.5A) at Vin=48V. Top
trace: output voltage (200mV/div.). Bottom trace:
load current (5A/div.). Current slew rate: 0.1A/μs.
Co=1μF cer+10μF tant. Time scale: 0.2ms/div.
Figure 6.
Turn-on transient at full rated load current
(resistive) with Co=1μF cer+10μF tant at Vin=48V,
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.
Figure 9.
Output voltage response to load current step-
change (12.5A–18.75A–12.5A) at Vin=48V. Top
trace: output voltage (200 mV/div.). Bottom trace:
load current (5A/div.). Current slew rate: 5A/μs.
Co=470μF POS+1μF cer. Time scale: 0.2ms/div.
ZD-02091 Rev. 1.0
www.power-one.com
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