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Not Recommended for New Designs - Replaced by BCM48Bx480y300A00
B048F480T30
Specifications
(continued)
Output (Conditions are at 48 Vin, full load, and 25°C ambient unless otherwise specified)
Parameter
Output voltage
Output power
Rated DC current
Peak repetitive power
Current share accuracy
Min
38.0
36.7
0
0
0
Typ
5
Max
55.0
53.8
300
300
8.2
450
10
Unit
Vdc
Vdc
W
W
Adc
W
%
Note
No load
Full load
38 - 55 V IN
38.0 - 55 V IN
P OUT ≤ 300 W
Max pulse width 1ms, max duty cycle 10%,
baseline power 50%
See Parallel Operation on Page 10
Efficiency
Half load
Full load
Internal output inductance
Internal output capacitance
Load capacitance
Output overvoltage set point
95.7
95.4
55.0
96.7
96.4
1.6
6
100
%
%
nH
μF
μF
Vdc
See Figure 5
See Figure 5
Effective value
Module will shut down
Output ripple voltage
No external bypass
9.4 μF bypass capacitor
Short circuit protection set point
Average short circuit current
6.4
180
20
0.095
320
mVp-p
mVp-p
Adc
A
See Figures 7 and 9
See Figure 8
Module will shut down
Effective switching frequency
3.2
3.3
3.5
MHz
Fixed, 1.7 MHz per phase
Line regulation
K
0.9900
1
1.0100
V OUT = K ? V IN at no load
Load regulation
R OUT
188.0
210.0
m Ω
Transient response
Voltage overshoot
Response time
Recovery time
1.2
200
1
V
ns
μs
100% load step; See Figures 10 and 11
See Figures 10 and 11
See Figures 10 and 11
Output overshoot
Input turn on
PC enable
0
0
mV
mV
No output filter; See Figure 3
No output filter; See Figure 2
Output turn on delay
From application of power
From release of PC pin
295
67
ms
ms
No output filter; See Figure 3
No output filter
Output Waveforms
98
Efficiency vs. Output Power
12
Power Dissipation
96
10
94
8
92
90
88
6
4
86
0
30
60
90
120
150
180
210
240
270
300
2
0
30
60
90
120
150
180
210
240
270
300
Output Power (W)
Figure 5 — Efficiency vs. output power
Output Power (W)
Figure 6 — Power dissipation as a function of output power
BCM ? Bus Converter
Page 3 of 12
Rev 3.4
01/2014
vicorpower.com
800 927.9474
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