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V048K015T100 Datasheet(PDF) 6 Page - Vicor Corporation

Part No. V048K015T100
Description  VI Chip - VTM Voltage Transformation Module
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Maker  VICOR [Vicor Corporation]
Homepage  http://www.vicorpower.com
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V048K015T100 Datasheet(HTML) 6 Page - Vicor Corporation

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Vicor Corporation
Tel: 800-735-6200
V•I Chip Voltage Transformation Module
V048K015T100
Rev. 1.2
Page 6 of 16
vicorpower.com
PRELIMINARY
PRELIMIN
ARY
Pin/Control Functions
+IN/-IN DC VOLTAGE PORTS
The VTM input should not exceed the high end of the range
specified. Be aware of this limit in applications where the VTM
is being driven above its nominal output voltage. A 14 V source
must be applied to the VC pin and voltage must be present at
the +In and -In ports in order for the VTM to process power. If
the input voltage exceeds the over voltage lock-out, 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.
VC – VTM Control
The VC port is multiplexed. It receives the initial Vcc 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 approximately 10 ms in
order for the VTM to startup. The VTM can be operated at
input voltages below 26 V as long as the VC voltage is applied.
PC – Primary Control
The Primary Control (PC) pin is a multifunction pin for
controlling the VTM as follows:
Disable – If the PC is left floating, the VTM output
is enabled. To disable the output, the PC pin must be pulled
lower than 2.4 V, referenced to -In. Optocouplers, open
collector transistors or relays can be used to control the PC
pin. Once disabled, 14 V must be re-applied to the VC pin
in order to restart the VTM
Primary Auxiliary Supply – The PC port can source up to
2.4 mA at 5 Vdc.
TM – Temperature Monitor
The Temperature Monitor (TM) provides a linear output
proportional to the internal temperature of the VTM. At 300ºK
(+27ºC) the TM output is 3.0 V referenced to -In and varies
10 mV/ºC. TM accuracy is +/-5ºC. This feature is useful for
validating the thermal design of the system as well as
monitoring the VTM temperature in the final application.
+OUT/-OUT DC Voltage Output Ports
The output (+OUT) and output return (-OUT) 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 19 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
Primary
Control
VTM Control
Temp.
Monitor
+In
-Out
+Out
-Out
+Out
Bottom View
A
B
C
D
E
F
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AA
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4 3
2 1
A
B
C
D
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N
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AA
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Figure 9—VTM BGA configuration
Signal
BGA
Name
Designation
+In
A1-L1, A2-L2
–In
AA1-AL1, AA2-AL2
TM
P1, P2
VC
T1, T2
PC
V1, V2
+Out
A3-G3, A4-G4,
U3-AC3, U4-AC4
–Out
J3-R3, J4-R4,
AE3-AL3, AE4-AL4


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