V048K015T090 Datasheet, PDF (6/16 Pages) Vicor Corporation – VI Chip - VTM Voltage Transformation Module

Pin/Control Functions
PRELIMINARY
+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
+Out
-Out
+Out
-Out
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B
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AG
AH
AJ
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AL
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A
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+In
Temp.
Monitor
VTM Control
Primary
Control
-In
VTM with the output rise of the PRM. Additionally, the VC
port provides feedback to the PRM to compensate for the VTM
Bottom View
output resistance. In typical applications using VTMs powered
from PRMs, the PRM’s VC port should be connected to the
Figure 9—VTM BGA configuration
VTM VC port.
Signal
BGA
P ^{R E L I M I N A RY 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
Name
+In
–In
TM
VC
PC
+Out
–Out
Designation
A1-L1, A2-L2
AA1-AL1, AA2-AL2
P1, P2
T1, T2
V1, V2
A3-G3, A4-G4,
U3-AC3, U4-AC4
J3-R3, J4-R4,
AE3-AL3, AE4-AL4
+OUT/-OUT DC Voltage Output Ports
The output (+OUT) and output return (-OUT) are through two
pin. Once disabled, 14 V must be re-applied to the VC pin
sets of contact locations. The respective +OUT and –OUT
in order to restart the VTM
groups must be connected in parallel with as low an
Primary Auxiliary Supply – The PC port can source up to
2.4 mA at 5 Vdc.
interconnect resistance as possible. Within the specified input
voltage range, the Level 1 DC behavioral model shown in
Figure 20 defines the output voltage of the VTM. The current
TM – Temperature Monitor
source capability of the VTM is shown in the specification table.
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.
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.
Vicor Corporation
Tel: [phone]
vicorpower.com
V•I Chip Voltage Transformation Module V048K015T090 Rev. 1.0
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