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
12.7
12.2
0
Typ
Max
18.3
17.9
240
20
Unit
Vdc
Vdc
W
Note
No load
Output voltage
Full load
Output power
38 - 55 VIN
POUT ≤ 240 W
Rated DC current
0
Adc
Max pulse width 1ms, max duty cycle 10%,
baseline power 50%
Peak repetitive power
360
10
W
%
Current share accuracy
Efficiency
5
See Parallel Operation on Page 12
Half load
95.5
95.0
96.0
95.7
1.6
%
%
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
25.4
Effective value
600
µF
18.3
Vdc
Module will shut down
153
13.4
23.0
0.176
3.6
220
25.0
3.7
mV
mV
Adc
A
See Figures 7 and 9
See Figure 8
20.2
3.3
Module will shut down
MHz
Fixed, 1.8 MHz per phase
VOUT = K•VIN at no load
K
0.3300
1/3
0.3367
35.0
Load regulation
ROUT
29.7
mΩ
Transient response
Voltage overshoot
Response time
245
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
280
67
ms
ms
No output filter; See Fig.3
No output filter
Output Waveforms
Efficiency vs. Output Power
Power Dissipation
98
96
94
92
90
88
86
84
82
80
12
11
10
9
8
7
6
5
4
3
2
0
24
48
72
96 120 144 168 192 216 240
0
24
48
72
96 120 144 168 192 216 240
Output Power (W)
Figure 6—Power dissipation as a function of output power
V•I Chip Bus Converter Module B048K160T24
Output Power (W)
Figure 5— Efficiency vs. output power at 48 Vin
vicorpower.com
800-735-6200
Rev. 1.0
Page 3 of 15
VICOR [ VICOR CORPORATION ]
