PRELIMINARY
V•I Chip Voltage Transformation Module
Specifications (continued)
Output (Conditions are at 48 Vin, full load, and 25°C ambient unless otherwise specified)
Parameter
Min
Typ
Max
Unit
Note
9.5
13.7
Vdc
No load
Output voltage
Rated DC current
9.2
0
13.4
25
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
37.5
A
DC current limit
25.5
30.0
5
36.3
10
Adc
%
Current share accuracy
Efficiency
See Parallel Operation on Page 12
Half load
95.0
95.0
95.5
96.0
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
55
Effective value
1,000
214
µF
13.8
Vdc
144
12.8
0.16
2.8
mV
mV
A
See Figures 7 and 9
See Figure 8
2.5
3.2
0.2525
13.9
MHz
Fixed, 1.4 MHz per phase
VOUT = K•VIN at no load
K
0.2475
1/4
Load regulation
ROUT
11.7
mΩ
Transient response
Voltage overshoot
Response time
355
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
308
80
ms
ms
No output filter; See Fig.3
No output filter
Output Waveforms
Power Dissipation vs. Output Power
Efficiency vs. Output Power
98
96
94
92
90
88
86
84
14
12
10
8
6
4
2
0
0
30
60
90
120 150 180 210 240 270 300
0
30
60
90
120 150 180 210 240 270 300
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
vicorpower.com
800-735-6200
V•I Chip Bus Converter Module
B048K120T30
Rev. 1.0
Page 3 of 16
VICOR [ VICOR CORPORATION ]
