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Datasheet: V048F040T050 (Vicor Corporation)

VI Chip - VTM Voltage Transformation Module

 

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Vicor Corporation
vicorpower.com
800-735-6200
VI Chip Voltage Transformation Module
V048F040T050
Rev. 1.1
Page 1 of 13
PRELIMINARY
Product Description
The V048F040T050 VI Chip Voltage Transformation
Module (VTM) excels at speed, density and efficiency to
meet the demands of advanced power applications
while providing isolation from input to output. It
achieves a response time of less than 1 s and delivers
up to 50 A in a volume of less than 0.274 in
3
with
unprecedented efficiency. It may be paralleled to deliver
higher power levels at an output voltage settable from
2.17 to 4.58 Vdc.
The VTM V048F040T050's nominal output voltage is 4
Vdc from a 48 Vdc input Factorized Bus, Vf, and is
controllable from 2.17 to 4.58 Vdc at no load, and from
1.98 to 4.40 Vdc at full load, over a Vf input range of 26
to 55 Vdc. It can be operated either open- or closed-loop
depending on the output regulation needs of the
application. Operating open-loop, the output voltage
tracks its Vf input voltage with a transformation ratio,
K = 1/12, for applications requiring an isolated output
voltage with high efficiency. Closing the loop back to an
input Pre-Regulation Module (PRM) or DC-DC converter
enables tight load regulation.
The 4 V VTM achieves a current density of 182 A/in
3
in
a VI Chip package compatible with standard pick-and-
place and surface mount assembly processes. The VTM's
fast dynamic response and low noise eliminate the
need for bulk capacitance at the load, substantially
increasing system density while improving reliability
and decreasing cost.
Parameter
Values
Unit
Notes
+In to -In
-1.0 to 60
Vdc
+In to -In
100
Vdc
For 100 ms
PC to -In
-0.3 to 7.0
Vdc
VC to -In
-0.3 to 19.0
Vdc
+Out to -Out
-0.5 to 12
Vdc
Isolation voltage
2,250
Vdc
Input to Output
Output current
50
A
Continuous
Peak output current
75
A
For 1 ms
Output power
220
W
Continuous
Peak output power
330
W
For 1 ms
Case temperature
208
C
During reflow
Operating junction temperature
(1)
-40 to 125
C
T - Grade
-55 to 125
C
M - Grade
Storage temperature
-40 to 150
C
T - Grade
-65 to 150
C
M - Grade
VI Chip
TM
VTM
Voltage Transformation Module
48 V to 4 V VI Chip Converter
50 A (75 A for 1 ms)
High density 182 A/in
3
Small footprint 45 A/in
2
Low weight 0.5 oz (14 g)
Pick & Place / SMD
125C operation
1 s transient response
3.5 million hours MTBF
Typical efficiency 94%
No output filtering required
V048F040T050
Actual size
VTM
Note:
(1) The referenced junction is defined as the semiconductor having the highest temperature.
This temperature is monitored by a shutdown comparator.
Output Current
Designator
(=I
OUT
)
V
048
F
040
T
050
Voltage
Transformation
Module
Input Voltage
Designator
Product Grade Temperatures (C)
Grade
Storage
Operating
T
-40 to150 -40 to125
M
-65 to150 -55 to125
Configuration Options
F = On-board (Figure 10)
Output Voltage
Designator
(=V
OUT
x10)
Part Numbering
Vf = 26 - 55 V
V
OUT
= 2.17 - 4.58 V
I
OUT
= 50 A
K = 1/12
R
OUT
= 3.9 m max
Absolute Maximum Ratings
vicorpower.com
800-735-6200
VI Chip Voltage Transformation Module
V048F040T050
Rev. 1.1
Page 2 of 13
VI Chip Voltage Transformation Module
PRELIMINARY
Electrical Specifications
Parameter
Min
Typ
Max
Unit
Note
Input voltage range
26
48
55
Vdc
Operable down to zero V with VC voltage applied
Input dV/dt
1
V/s
Input overvoltage turn-on
55.0
Vdc
Input overvoltage turn-off
59.0
Vdc
Input current
4.6
Adc
Input reflected ripple current
114
mA p-p
Using test circuit in Figure 14; See Figure 1
No load power dissipation
4.10
5.10
W
Internal input capacitance
1.9
F
Internal input inductance
5
nH
Input Specs
(Conditions are at 48 Vin, full load, and 25C ambient unless otherwise specified)
Parameter
Min
Typ
Max
Unit
Note
Output voltage
2.17
4.58
Vdc
No load
1.98
4.40
Vdc
Full load
Rated DC current
0
50
Adc
26 - 55 V
IN
Peak repetitive current
75
A
Max pulse width 1ms, max duty cycle 10%,
baseline power 50%
Short circuit protection set point
59.8
Adc
Module will shut down
Current share accuracy
5
10
%
See Parallel Operation on Page 8
Efficiency
Half load
93.4
94.8
%
See Figure 3
Full load
93.1
94.4
%
See Figure 3
Internal output inductance
1.1
nH
Internal output capacitance
255
F
Effective value
Output overvoltage setpoint
4.6
Vdc
Module will shut down
Output ripple voltage
No external bypass
216
290
mV
See Figures 2 and 5
47 F bypass capacitor
8
mV
See Figure 6
Effective switching frequency
2.40
2.55
2.70
MHz
Fixed, 1.3 MHz per phase
Line regulation
K
0.0825
1/12
0.0842
V
OUT
= KV
IN
at no load
Load regulation
R
OUT
3.3
3.9
m
See Figure 17
Transient response
Voltage overshoot
110
mV
50 A load step with 100 F C
IN
; See Figures 7 and 8
Response time
200
ns
See Figures 7 and 8
Recovery time
1
s
See Figures 7 and 8
Output Specs
(Conditions are at 48 Vin, full load, and 25C ambient unless otherwise specified)
vicorpower.com
800-735-6200
VI Chip Voltage Transformation Module
V048F040T050
Rev. 1.1
Page 3 of 13
PRELIMINARY
Figure 1-- Input reflected ripple current at full load and 48 Vf.
Efficiency vs. Output Current
82
84
86
88
90
92
94
96
0
5
10
15
20
25
30
35
40
45
50
Output Current (A)
Efficiency (%)
Figure 3-- Efficiency vs. output current.
Power Dissipation
2
4
6
8
10
12
14
0
5
10
15
20
25
30
35
40
45
50
Output Current (A)
Power Dissipation (W)
Figure 4--Power dissipation vs. output current.
Waveforms
Figure 6--Output voltage ripple at full load and 48 Vf with 47 F ceramic
POL bypass capacitance and 20 nH distribution inductance.
Figure 5-- Output voltage ripple at full load and 48 Vf; with no POL bypass
capacitance.
Ripple vs. Output Current
80
100
120
140
160
180
200
220
0
5
10
15
20
25
30
35
40
45
50
Output Current (A)
Output Ripple (mVpk-pk)
Figure 2-- Output voltage ripple vs. output current at 48 Vf with no POL
bypass capacitance.
Electrical Specifications
(continued)
vicorpower.com
800-735-6200
VI Chip Voltage Transformation Module
V048F040T050
Rev. 1.1
Page 4 of 13
VI Chip Voltage Transformation Module
PRELIMINARY
Parameter
Min
Typ
Max
Unit
Note
Primary Control (PC)
DC voltage
4.8
5.0
5.2
Vdc
Module disable voltage
2.4
2.5
Vdc
Module enable voltage
2.5
2.6
Vdc
VC voltage must be applied when module is enabled using PC
Current limit
2.4
2.5
2.9
mA
Source only
Disable delay time
30
s
PC low to Vout low
VTM Control (VC)
External boost voltage
12
14
19
Vdc
Required for VTM start up without PRM
External boost duration
10
ms
Vin > 26 Vdc. VC must be applied continuously
if Vin < 26 Vdc.
Auxiliary Pins
(Conditions are at 48 Vin, full load, and 25C ambient unless otherwise specified)
Parameter
Min
Typ
Max
Unit
Note
MTBF
MIL-HDBK-217F
3.5
Mhrs
25C, GB
Isolation specifications
Voltage
2,250
Vdc
Input to Output
Capacitance
3,000
pF
Input to Output
Resistance
10
M
Input to Output
Agency approvals (pending)
cTVus
UL/CSA 60950, EN 60950
CE Mark
Low voltage directive
Mechanical parameters
See Mechanical Drawing, Figures 12
Weight
0.5 / 14.0
oz / g
Dimensions
Length
1.26 / 32
in / mm
Width
0.87 / 22
in / mm
Height
0.25 / 6,2
in / mm
General
Figure 7-- 0-50 A load step with 100 F input capacitance and no output
capacitance.
Figure 8-- 50-0 A load step with 100 F input capacitance and no output
capacitance.
Electrical Specifications
(continued)
vicorpower.com
800-735-6200
VI Chip Voltage Transformation Module
V048F040T050
Rev. 1.1
Page 5 of 13
PRELIMINARY
Pin/Control Functions
+IN/-IN DC Voltage Ports
The VTM input should not exceed the maximum specified. Be aware of
this limit in applications where the VTM is being driven above its
nominal output voltage. If less than 26 Vdc is present at the +In and -In
ports, a continuous VC voltage must be applied for the VTM to process
power. Otherwise VC voltage need only be applied for 10 ms after the
voltage at the +In and -In ports has reached or exceeded 26 Vdc. If the
input voltage exceeds the overvoltage turn-off, the VTM will shutdown.
The VTM does not have internal input reverse polarity protection.
Adding a properly sized diode in series with the positive input or a
fused reverse-shunt diode will provide reverse polarity protection.
TM For Factory Use Only
VC VTM Control
The VC port is multiplexed. It receives the initial V
CC
voltage from an
upstream PRM, synchronizing the output rise of the VTM with the
output rise of the PRM. Additionally, the VC port provides feedback to
the PRM to compensate for the VTM output resistance. In typical
applications using VTMs powered from PRMs, the PRM's VC port
should be connected to the VTM VC port.
In applications where a VTM is being used without a PRM, 14 V must
be supplied to the VC port for as long as the input voltage is below 26 V
and for 10 ms after the input voltage has reached or exceeded 26 V. The
VTM is not designed for extended operation below 26 V. The VC port
should only be used to provide V
CC
voltage to the VTM during startup.
PC Primary Control
The Primary Control (PC) port is a multifunction port for controlling the
VTM as follows:
Disable If PC is left floating, the VTM output is enabled. To
disable the output, the PC port must be pulled lower than 2.4 V,
referenced to -In. Optocouplers, open collector transistors or relays
can be used to control the PC port. Once disabled, 14 V must be
re-applied to the VC port to restart the VTM.
Primary Auxiliary Supply The PC port can source up to 2.4 mA
at 5 Vdc.
+OUT/-OUT DC Voltage Output Ports
The output and output return are through two sets of contact
locations. The respective +Out and Out groups must be connected in
parallel with as low an interconnect resistance as possible. Within the
specified input voltage range, the Level 1 DC behavioral model shown
in Figure 17 defines the output voltage of the VTM. The current source
capability of the VTM is shown in the specification table.
To take full advantage of the VTM, the user should note the low output
impedance of the device. The low output impedance provides fast
transient response without the need for bulk POL capacitance. Limited-
life electrolytic capacitors required with conventional converters can be
reduced or even eliminated, saving cost and valuable board real estate.
-In
PC
VC
TM
+In
-Out
+Out
-Out
+Out
Bottom View
A
B
C
D
E
F
G
H
J
K
L
M
N
P
R
T
4 3 2 1
A
B
C
D
E
H
J
K
L
M
N
P
R
T
Figure 9--VTM pin configuration
Signal Name
Pin Designation
+In
A1-E1, A2-E2
In
L1-T1, L2-T2
TM
H1, H2
VC
J1, J2
PC
K1, K2
+Out
A3-D3, A4-D4,
J3-M3, J4-M4
Out
E3-H3, E4-H4,
N3-T3, N4-T4
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