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QM48S40033 DC-DC Converter Data Sheet
36-75 VDC Input; 3.3 VDC @ 40A Output
Electrical Specifications: (continued)
Conditions: T A =25oC, Airflow=300 LFM (1.5 m/s), Vin=48 Vdc, unless otherwise specified.
PARAMETER
NOTES
MIN
TYP
MAX
UNITS
INPUT CHARACTERISTICS
Maximum Input Current
Input Stand-by Current
Input No Load Current (0 load on the output)
Input Reflected-Ripple Current
Input Voltage Ripple Rejection
40 Adc, 3.3 Vdc Out @ 36 Vdc In
Vin = 48 V, converter disabled
Vin = 48 V, converter enabled
25MHz bandwidth
120Hz
3
63
7.5
64
4.1
Adc
mAdc
mAdc
mA PK-PK
dB
OUTPUT CHARACTERISTICS
Output Voltage Set Point (no load)
3.267
3.300
3.333
Vdc
Output Regulation
Over Line
Over Load
±2
±2
±5
±5
mV
mV
Output Voltage Range
Over line, load and temperature
2
3.250
3.350
Vdc
Output Ripple and Noise - 25MHz bandwidth
External Load Capacitance
Output Current Range
Full load + 10 μF tantalum + 1 μF ceramic
Plus full load (resistive)
0
30
50
40,000
40
mV PK-PK
μF
Adc
Current Limit Inception
Peak Short-Circuit Current
RMS Short-Circuit Current
Non-latching
Non-latching. Short=10m ? .
Non-latching
42
47
50
10
52
60
15
Adc
A
Arms
DYNAMIC RESPONSE
Load Change 25% of Iout Max, di/dt = 1 A/μS
Setting Time to 1%
Co = 470 μF tantalum + 1 μF ceramic
120
80
mV
μ s
EFFICIENCY
100% Load
50% Load
Additional Notes:
2.
-40oC to 85oC
FEB 10, 2004 revised to NOV 13, 2006
Page 3 of 13
90.5
92.5
%
%
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