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
4.75
4.45
0
Typ
Max
6.87
6.60
240
Unit
Vdc
Vdc
W
Note
No load
Output voltage
Full load
48 - 55 VIN
38 - 55 VIN
POUT ≤ 240 W
Output power
0
188
W
Rated DC current
0
42.4
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
94.3
93.8
95.8
94.8
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
Short circuit protection set point
Average short circuit current
Effective switching frequency
Line regulation
nH
µF
55.0
Effective value
4,000
µF
6.9
Vdc
Module will shut down
230
12.5
49.9
1
300
55.0
3.0
mV
mV
Adc
A
See Figures 7 and 9
See Figure 8
42.8
2.0
Module will shut down
2.5
MHz
Fixed, 1.25 MHz per phase
VOUT = K•VIN at no load
K
0.1238
1/8
5.5
0.1263
7.5
Load regulation
ROUT
mΩ
Transient response
Voltage overshoot
Response time
180
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
290
85
ms
ms
No output filter; See Fig.3
No output filter
Output Waveforms
Efficiency vs. Output Power
Power Dissipation
96
95.5
95
14
13
12
11
10
9
94.5
94
93.5
93
8
7
6
92.5
92
5
4
3
91.5
91
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)
Output Power (W)
Figure 6—Power dissipation as a function of output power
V•I Chip Bus Converter Module B048K060T24
Figure 5— Efficiency vs. output power at 48 Vin
vicorpower.com
800-735-6200
Rev. 1.0
Page 3 of 15
VICOR [ VICOR CORPORATION ]
