SPECIFICATIONS (CONT.)
(Conditions are at 48 Vin, full load, and 25°C ambient unless otherwise specified)
Output Specifications
Parameter
Min
2.38
2.24
0
Typ
Max
3.43
3.31
210
156
70
Unit
Vdc
Vdc
W
Note
No load
Output voltage
Full load
50 - 55 VIN
38 - 55 VIN
Output power
0
W
Rated DC current
0
Adc
POUT ≤ 210 W
Max pulse width 1ms, max duty cycle 10%,
baseline power 50%
Peak repetitive power
315
10
W
%
Current share accuracy
Efficiency
5
See Parallel Operation on Page 8
Half load
94.0
93.8
95.0
94.2
1.1
%
%
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
254
Effective value
16,100
140
µF
3.4
Vdc
65
mVp-p
mVp-p
Adc
See Figures 7 and 9
See Figure 8
8.6
98.0
2.4
Module will shut down
3.0
2.5
A
2.6
0.0631
2.0
MHz
Fixed, 1.3 MHz per phase
VOUT = K•VIN at no load
K
0.0619
1/16
Load regulation
ROUT
1.7
mΩ
Transient response
Voltage overshoot
Response time
66
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
70
ms
ms
No output filter; See Figure 3
No output filter
255
OUTPUT WAVEFORMS
Power Dissipation
Efficiency vs. Output Power
96
94
92
90
88
86
84
14
12
10
8
6
4
2
0
21
42
63
84 105 126 147 168 189 210
0
21
42
63
84 105 126 147 168 189 210
Output Power (W)
Figure 5 — Efficiency vs. output power
Bus Converter Module BC048A030T021FP
Output Power (W)
Figure 6 — Power dissipation as a function of output power
vicorpower.com Rev. 1.0
Page 4 of 11
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