VTM
TM
Current Multiplier
Features
•
100°C baseplate operation
•
48 V to 9.6 V Converter
•
25 A (37.5 A for 1 ms)
•
High density – up to 312 W/in
3
•
Small footprint – 1.64 and 2.08 in
2
Size:
1.91 x 1.09 x 0.37 in
48,6 x 27,7 x 9,5 mm
•
ZVS / ZCS isolated sine amplitude converter
•
Typical efficiency 96%
•
<1 µs transient response
•
Isolated output
•
No output filtering required
•
Lead free wave solder compatible
•
Agency approvals
•
Height above board – 0.37 in (9.5 mm)
•
Low weight – 1.10 oz (31.3 g)
Applications
•
Solid state lighting
•
Stadium displays
•
Industrial controls
•
Avionics
•
Underseas
•
RF Amplifiers
•
Microprocessor and DSP
requiring fast response
Product Overview
The thermally enhanced VI BRICK VTM current multiplier excels at speed, density and
efficiency to meet the demands of advanced power applications. Combined with the
VI BRICK PRM regulator they create a DC-DC converter with flexibility to provide isolation
and regulation where needed. The PRM can be located with the VTM at the point of load
or remotely in the back plane or on a daughter card.
Part Numbering
VT
Voltage
Transformation
Module
048
Input
Voltage
Designator
A
Package
Size
096
Output
Voltage
Designator
(=V
OUT
x10)
T
025
Output
Current
Designator
(=I
OUT
)
F
P
Product Grade Temperatures (°C)
Grade
T=
M=
Operating
Storage
Baseplate
F
= Slotted flange
T
= Transverse heat sink
[a]
[a]
Contact
Pin Style
P
= Through hole
-40 to +100 -40 to +125
-55 to +100 -65 to +125
factory
Voltage Transformation Module
VT048A096T025FP
vicorpower.com
Rev. 1.0
Page 1 of 11
SPECIFICATIONS (CONT.)
Parameter
Output voltage
Rated DC current
Peak repetitive current
Short circuit protection set point
Current share accuracy
Efficiency
Half load
Full load
Internal output inductance
Internal output capacitance
Output overvoltage setpoint
Output ripple voltage
No external bypass
Min
6.40
6.10
0
Typ
Max
11.0
10.7
25
37.5
Unit
Vdc
Vdc
Adc
A
Adc
Note
No load
Full load
32 - 55 V
IN
Max pulse width 1ms, max duty cycle 10%,
baseline power 50%
33.0
5
10
Module will shut down
See Parallel Operation on Page 7
%
95.5
95.5
96.2
96.2
1.6
55
%
%
nH
µF
Vdc
See Figure 3
See Figure 3
Effective value
Module will shut down
11.0
176
200
mVp-p
See Figures 28.5789e F06.2
176
200
WAVEFORMS
Ripple vs. Output Current
180
Output Ripple (mVpk-pk)
160
140
120
100
80
60
40
0
2.5
5
7.5
10
12.5
15
17.5
20
22.5
25
Output Current (A)
Figure 1
—
Input reflected ripple current at full load and 48 Vf.
Figure 2
—
Output voltage ripple vs. output current at 48 Vf with no POL
bypass capacitance.
Voltage Transformation Module
VT048A096T025FP
vicorpower.com
Rev. 1.0
Page 3 of 11
SPECIFICATIONS (CONT.)
WAVEFORMS
Efficiency vs. Output Current
98
10
Power Dissipation
Power Dissipation (W)
9
8
7
6
5
4
3
2
96
Efficiency (%)
94
92
90
88
86
84
0
2.5
5
7.5
10
12.5
15
17.5
20
22.5
25
0
2.5
5
7.5
10
12.5
15
17.5
20
22.5
25
Output Current (A)
Output Current (A)
Figure 3
—
Efficiency vs. output current.
Figure 4
—
Power dissipation vs. output current.
Figure 5
—
Output voltage ripple at full load and 48 Vf with no POL bypass
capacitance.
Figure 6
—
Output voltage ripple at full load and 48 Vf with 10 µF ceramic
POL bypass capacitance and 20 nH distribution inductance.
Figure 7
—
0-25 A load step with 100 µF input capacitance and no output
capacitance.
Figure 8
—
25-0 A load step with 100 µF input capacitance and no output
capacitance.
Voltage Transformation Module
VT048A096T025FP
vicorpower.com
Rev. 1.0
Page 4 of 11
SPECIFICATIONS (CONT.)
General Specifications
Parameter
MTBF
MIL-HDBK-217F
Isolation specifications
Voltage
Capacitance
Resistance
Agency approvals
10
cTÜVus
CE Mark
RoHS
Mechanical
Weight
Dimensions
Length
Width
Height
Thermal
Over temperature shutdown
Thermal capacity
Baseplate-to-ambient
Baseplate-to-ambient; 1000 LFM
Baseplate-to-sink; flat, greased surface
Baseplate-to-sink; thermal pad
125
130
23.8
7.7
2.9
0.40
0.36
135
°C
Ws /°C
°C / W
°C / W
°C / W
°C / W
Junction temperature
1.91/48,6
1.09/27,7
0.37/9,5
in / mm
in / mm
in / mm
Baseplate model
Baseplate model
Baseplate model
1.10/31.3
oz /g
See Mechanical Drawings, Figures 15, 16
2,250
3,000
Vdc
pF
MΩ
Input to output
Input to output
Input to output
UL /CSA 60950-1, EN 60950-1
Low voltage directive
3.5
Mhrs
25°C, GB
Min
Typ
Max
Unit
Notes
Auxiliary Pins
Parameter
Primary Control (PC)
DC voltage
Module disable voltage
Module enable voltage
Current limit
Disable delay time
VTM Control (VC)
External boost voltage
External boost duration
12
14
10
19
Vdc
ms
Required for VTM start up without PRM
Vin > 32 Vdc. VC must be applied continuously
if Vin < 32 Vdc.
2.4
4.8
2.4
5.0
2.5
2.5
2.5
20
2.6
2.9
5.2
Vdc
Vdc
Vdc
mA
µs
VC voltage must be applied when module is
enabled using PC
Source only
PC low to Vout low
Min
Typ
Max
Unit
Notes
Voltage Transformation Module
VT048A096T025FP
vicorpower.com
Rev. 1.0
Page 5 of 11
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