SPECIFICATIONS (CONT.)
(Conditions are at 48 Vin, full load, and 25°C ambient unless otherwise specified)
Output Specifications
Parameter
Min
12.7
12.1
0
Typ
Max
18.3
17.8
240
237
20
Unit
Vdc
Vdc
W
Note
No load
Output voltage
Full load
38 - 55 VIN
38 - 55 VIN
Output power
0
W
Rated DC current
0
Adc
POUT ≤ 240 W
Max pulse width 1ms, max duty cycle 10%,
baseline power 50%
Peak repetitive power
360
10
W
%
Current share accuracy
Efficiency
5
See Parallel Operation on Page 8
Half load
94.3
94.7
94.9
95.5
1.6
%
%
See Figure 5
See Figure 5
Full load
Internal output inductance
Internal output capacitance
Load capacitance
Output overvoltage setpoint
Output ripple voltage
No external bypass
10 µF bypass capacitor
Short circuit protection set point
Average short circuit current
Effective switching frequency
Line regulation
nH
µF
25.4
Effective value
600
300
µF
18.3
Vdc
153
mVp-p
mVp-p
Adc
See Figures 7 and 9
See Figure 8
13.4
20.0
3.3
Module will shut down
0.176
3.6
A
3.7
0.3367
40
MHz
Fixed, 1.8 MHz per phase
VOUT = K•VIN at no load
K
0.3300
1/3
Load regulation
ROUT
29.7
mΩ
Transient response
Voltage overshoot
Response time
250
200
1
mV
ns
100% load step; See Figures 10 and 11
See Figures 10 and 11
Recovery time
µs
See Figures 10 and 11
Output overshoot
Input turn-on
0
0
mV
mV
No output filter; See Figure 3
No output filter; See Figure 2
PC enable
Output turn-on delay
From application of power
From release of PC pin
280
67
ms
ms
No output filter; See Figure 3
No output filter
OUTPUT WAVEFORMS
Efficiency vs. Output Power
Power Dissipation
12
10
8
98
96
94
92
90
88
86
6
4
2
0
24
48
72
96 120 144 168 192 216 240
0
24
48
72
96 120 144 168 192 216 240
Output Power (W)
Figure 5 — Efficiency vs. output power
Bus Converter Module BC048A160T024FP
Output Power (W)
Figure 6 — Power dissipation as a function of output power
vicorpower.com Rev. 1.1
Page 4 of 11
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