PRELIMINARY
V•I Chip Bus Converter Module
Specifications (continued)
Output (Conditions are at 48 Vin, full load, and 25°C ambient unless otherwise specified)
Parameter
Min
Typ
Max
Unit
Note
2.38
3.43
Vdc
No load
Output voltage
Rated DC current
2.24
0
3.29
70
Vdc
Adc
Full load
Module will shut down when current limit is
reached or exceeded
Max pulse width 1ms, max duty cycle 10%,
baseline power 50%
Peak repetitive current
105
A
DC current limit
71.4
87.1
5
94.5
10
Adc
%
Current share accuracy
Efficiency
See Parallel Operation on Page 12
Half load
94.0
93.5
94.5
94.1
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
Average short circuit current
Effective switching frequency
Line regulation
nH
µF
254
Effective value
16,100
100
µF
3.4
Vdc
80
8.6
3.6
2.6
mV
mV
A
See Figures 7 and 9
See Figure 8
2.5
2.8
0.0631
2.0
MHz
Fixed, 1.3 MHz per phase
VOUT = K•VIN at no load
K
0.0619
1/16
1.8
Load regulation
ROUT
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 Fig.3
No output filter; See Fig.2
PC enable
Output turn-on delay
From application of power
From release of PC pin
285
80
ms
ms
No output filter; See Fig.3
No output filter
Output Waveforms
Power Dissipation
Efficiency vs. Output Power
14
95
94
93
92
91
90
89
88
87
86
85
13
12
11
10
9
8
7
6
5
4
3
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)
Output Power (W)
Figure 6—Power dissipation as a function of output power
Figure 5— Efficiency vs. output power at 48 Vin
vicorpower.com
800-735-6200
V•I Chip Bus Converter Module
B048K030T21
Rev. 1.0
Page 3 of 15
VICOR [ VICOR CORPORATION ]
