QM48T/S25050 DC-DC Converter Data Sheet
36-75 VDC Input; 5 VDC @ 25 A Quarter-Brick
Fig. 9: 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 (2 V/div.) Time scale: 2 ms/div.
Fig. 11: Output voltage response to load current step-change
(12.5 A – 18.75 A – 12.5 A) at Vin = 48 V. Top trace: output
voltage (100 mV/div.). Bottom trace: load current (5 A/div).
Current slew rate: 1 A/ μ s. Co = 470 μ F tantalum + 1 μ F
ceramic. Time scale: 0.2 ms/div.
Fig. 10: Turn-on transient at full rated load current (resistive)
plus 10,000 μ F at Vin = 48 V, triggered via ON/OFF pin. Top
trace: ON/OFF signal (5 V/div.). Bottom trace: output voltage
(2 V/div.). Time scale: 2 ms/div.
Fig. 12: Output voltage ripple (20 mV/div.) at full rated load
current into a resistive load with Co = 10 μ F tantalum + 1uF
ceramic and Vin = 48 V. Time scale: 1 μ s/div.
MAR 27, 2003 revised to SEP 28, 2006
Page 10 of 13
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