PRELIMINARY
Specifications
(continued)
V•I Chip Bus Converter Module
Output
(Conditions are at 48 Vin, full load, and 25°C ambient unless otherwise specified)
Parameter
Output voltage
Rated DC current
Peak repetitive current
DC current limit
Current share accuracy
Efficiency
Half load
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
K
Load regulation
R
OUT
Transient response
Voltage overshoot
Response time
Recovery time
Output overshoot
Input turn-on
PC enable
Output turn-on delay
From application of power
From release of PC pin
71.4
87.1
5
94.0
93.5
94.5
94.1
1.1
254
16,100
3.4
80
8.6
3.6
2.5
0.0619
2.6
1/16
1.8
66
200
1
0
0
285
80
100
Min
2.38
2.24
0
Typ
Max
3.43
3.29
70
105
94.5
10
Unit
Vdc
Vdc
Adc
A
Adc
%
%
%
nH
µF
µF
Vdc
mV
mV
A
MHz
Note
No load
Full load
Module will shut down when current limit is
reached or exceeded
Max pulse width 1ms, max duty cycle 10%,
baseline power 50%
See Parallel Operation on Page 12
See Figure 5
See Figure 5
Effective value
See Figures 7 and 9
See Figure 8
Fixed, 1.3 MHz per phase
V
OUT
= K•V
IN
at no load
2.8
0.0631
2.0
mΩ
mV
ns
µs
mV
mV
ms
ms
100% load step; See Figures 10 and 11
See Figures 10 and 11
See Figures 10 and 11
No output filter; See Fig.3
No output filter; See Fig.2
No output filter; See Fig.3
No output filter
Output Waveforms
Efficiency vs. Output Power
95
94
93
14
13
12
11
10
9
8
7
6
5
4
3
0
21
42
63
84
105
126
147
168
189
210
Power Dissipation
Power Dissipation (W)
Efficiency (%)
92
91
90
89
88
87
86
85
0
21
42
63
84
105
126
147
168
189
210
Output Power (W)
Figure 5—
Efficiency vs. output power at 48 Vin
Output Power (W)
Figure 6—Power
dissipation as a function of output power
vicorpower.com
800-735-6200
V•I Chip Bus Converter Module
B048K030T21
Rev. 1.0
Page 3 of 15
VICOR [ VICOR CORPORATION ]
