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QL48T30012 DC-DC Converter Data Sheet
36-75 VDC Input; 1.2 VDC @ 30A Output
i S
10 μ H
i C
Q Family
source
inductance
V source
33 μ F
ESR <1
electrolytic
capacitor
TM
DC/DC
Converter
1 μ F
ceramic
capacitor
Vout
Fig. 21: Output voltage ripple (20 mV/div.) at full rated load
current into a resistive load with Co = 10 μ F tantalum + 1uF ce-
ramic and Vin = 48 V. Time scale: 1 μ s/div.
Fig. 23: Input reflected ripple current, i c (100 mA/div), meas-
ured at input terminals at full rated load current and Vin = 48 V.
Refer to Fig. 22 for test setup. Time scale: 1 μ s/div.
Fig. 22: Test setup for measuring input reflected ripple cur-
rents, i c and i s .
Fig. 24: Input reflected ripple current, i s (10 mA/div), measured
through 10 μ H at the source at full rated load current and Vin =
48 V. Refer to Fig. 22 for test setup. Time scale: 1 μ s/div.
MAR 26, 2003 revised to NOV 13, 2006
Page 13 of 14
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