JUN 09, 2003 revised to NOV 20, 2006 Page 12 of 14 www.power-one.com
Q48T30025 DC-DC Converter Data Sheet
3
-75 VDC In
ut; 2.5 VDC
30A O
t
ut
Fig. 18: 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 (1 V/div.) Time scale: 1 ms/div.
Fig. 20: Output voltage response to load current step-change
(7.5 A – 15 A – 7.5 A) at Vin = 48 V. Top trace: output voltage
(100 mV/div). Bottom trace: load current (5 A/div.). Current
slew rate: 0.1 A/µs. Co = 1 µF ceramic. Time scale: 0.2 ms/div.
Fig. 19: 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
(1 V/div.). Time scale: 1 ms/div.
Fig. 21: Output voltage response to load current step-change
(7.5 A – 15 A – 7.5 A) at Vin = 48 V. Top trace: output voltage
(100 mV/div.). Bottom trace: load current (5 A/div). Current
slew rate: 5 A/µs. Co = 450 µF tantalum + 1 µF ceramic. Time
scale: 0.2 ms/div.