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Q48T30015 DC-DC Converter Data Sheet
36-75 VDC Input; 1.5 VDC @ 30A Output
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 (0.5 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/ μ s. Co = 1 μ F ceramic. Time scale: 0.2 ms/div.
Fig. 19: 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
(0.5 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/ μ s. Co = 450 μ F tantalum + 1 μ F ceramic. Time
scale: 0.2 ms/div.
MAY 02, 2003 revised to NOV 20, 2006
Page 12 of 14
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