
Voltage Transformation Module
VT048A480T006FP
vicorpower.com
Rev. 1.0
Page 3 of 11
SPECIFICATIONS (CONT.)
WAVEFORMS
Figure 1 — Input reflected ripple current at full load and 48 Vf.
Ripple vs. Output Current
25
50
75
100
125
150
175
200
0
0.625 1.25 1.875 2.5
3.125 3.75 4.375
5
5.625 6.25
Output Current (A)
Output
Ripple
(mVpk-pk)
Figure 2 — Output voltage ripple vs. output current at 48 Vf with no POL
bypass capacitance.
Parameter
Min
Typ
Max
Unit
Note
Output voltage
26.0
55.0
Vdc
No load
24.7
53.8
Vdc
Full load
Rated DC current
0
6.3
Adc
26.0 - 55 VIN
Peak repetitive current
9.4
A
Max pulse width 1ms, max duty cycle 10%,
baseline power 50%
Short circuit protection set point
6.4
Adc
Module will shut down
Current share accuracy
5
10
%
See Parallel Operation on Page 7
Efficiency
Half load
96.0
96.7
%
See Figure 3
Full load
96.0
96.4
%
See Figure 3
Internal output inductance
6.0
nH
Internal output capacitance
6
F
Effective value
Output overvoltage setpoint
55.0
Vdc
Module will shut down
Output ripple voltage
No external bypass
180
320
mVp-p
See Figures 2 and 5
9.4 F bypass capacitor
20
mVp-p
See Figure 6
Effective switching frequency
3.2
3.3
3.50
MHz
Fixed, 1.7 MHz per phase
Line regulation
K
0.9900
1
1.0100
VOUT = KVIN at no load
Load regulation
ROUT
188
210
mΩ
See Figure 13
Transient response
Voltage overshoot
1.2
V
6.3 A load step with 100 F CIN; See Figures 7 and 8
Response time
200
ns
See Figures 7 and 8
Recovery time
1
s
See Figures 7 and 8
Output Specifications (Conditions are at 48 Vin, full load, and 25°C ambient unless otherwise specified)