Specifications, continued
OUTPUT (Conditions are at 48 Vin, full load, and 25°C ambient unless otherwise specified)
Parameter
Min
Typ
Max
Unit
Note
Rated DC current
0
25
Adc
Max pulse width 1ms, max duty cycle 10%,
baseline power 50%
Peak repetitive current
37.5
A
DC current limit
33
36
5
38
10
Adc
%
Current share accuracy
Efficiency
See Parallel Operation on page 12
Half load
95.0
95.0
96.3
96.4
1.6
%
%
See Fig.5
See Fig.5
Full load
Internal output inductance
Internal output capacitance
Load capacitance
Output overvoltage setpoint
Output ripple voltage
No external bypass
10 µF bypass capacitor
Average short circuit current
Effective switching frequency
Line regulation
nH
µF
µF
Vdc
35
Effective value
3,000
180
11.5
120
14
mV
mV
See Figs.7 and 9
See Fig.8
200
3.4
mA
3.2
3.6
0.204
9.5
MHz
Fixed, 1.7 MHz per phase
VOUT = K•VIN at no load
See Fig. 26
K
0.196
0.200
Load regulation
ROUT
mΩ
Transient response
Voltage overshoot
Response time
125
200
1
mV
ns
100% load step; See Figs.10 and 11
See Figs.10 and 11
Recovery time
µs
See Figs.10 and 11
Output overshoot
Input turn-on
0
0
mV
mV
No output filter; See Fig.3
No output filter; See Fig.2
PC enable
Output turn-on delay
From application of power
From release of PC pin
275
50
380
ms
ms
No output filter; See Fig.3
No output filter; See Fig.2
OUTPUT WAVEFORMS
Efficiency vs. Output Power
Power Dissipation
97
96
95
94
93
92
91
90
89
88
87
86
85
12
10
8
6
4
2
0
0
20
40
60
80 100 120 140 160 180 200 220 240
0
20
40
60
80
100 120 140 160 180 200 220 240
Output Power (W)
Output Power (W)
Figure 5— Efficiency vs. output power at 48 Vin
Figure 6—Power dissipation as a function of output power
Vicor Corporation
Tel: 800-735-6200
V•I Chip Bus Converter
B048K096T24
Rev. 1.9
Page 3 of 16
45
vicorpower.com
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