CONTROL FUNCTIONS - PR PIN
Parallel Operation
The PR pin supports paralleling for increased power with N+1
(N+M) redundancy and phased array capability. Modules of
the same input voltage, output voltage, and power level will
current share if all PR pins are suitably interfaced.
Compatible interface architectures include the following:
DC coupled single-wire interface.
All PR pins are directly
connected to one another. This interface supports current
sharing but is not fault tolerant. Minus In pins must be tied to
the same electric potential. See Figure 9.
AC coupled single-wire interface.
All PR pins are connected
to a single communication bus through 0.001碌F (500V)
capacitors. This interface supports current sharing and is fault
tolerant except for the communication bus. See Figure 10.
+In
PC
PR
鈥揑n
+Out
+In
+Out
Module 1
SC
0.001碌F
PC
PR
Module 1
SC
鈥揙ut
鈥揑n
鈥揙ut
+In
PC
PR
鈥揑n
+Out
+In
+Out
Module 2
(up to 12)
SC
0.001碌F
PC
PR
Module 2
(up to 12)
SC
鈥揙ut
鈥揑n
鈥揙ut
Ground plane
Ground plane
Figure 9鈥擠C
coupled single-wire interface.
+Out
SC
鈥揙ut
Figure 10鈥擜C
coupled single-wire interface.
Plane
+Out
SC
鈥揙ut
L
O
A
D
鈥?The +Out and 鈥揙ut
power buses should be
designed to minimize
and balance parasitic
impedance from each
module output to the
load.
鈥?At the discretion of the
power system designer,
a subset of all modules
within an array may be
configured as slaves by
shorting SC to 鈥揙ut.
鈥?Do not use output
OR鈥檌ng diodes with
MicroMods.
+Out
0.001
碌F
R2
7
6
LM10
SC
R1
2
1
3
1.05K鈩?/div>
R4
Load
8
R3
4
200鈩?/div>
1.2K鈩?/div>
鈥揙ut
+Out
SC
鈥揙ut
Ground
Plane
鈥?This module is designed for point of load regulation, where remote sensing
is not required. Active voltage drop compensator, as shown here, may be
used in applications with significant distribution losses. Details of this circuit
are available in the design guide.
Figure 11鈥擭+1
module array output connections.
PIN STYLES *
Designator
(None)
L
S
N
Description
Short solder
Long solder
Short ModuMate
Long ModuMate
Notes
Figure 12鈥擵oltage
drop compensation.
Requires in-board, mounting
On-board mounting for 0.065" boards
SurfMate or in-board socket mounting
On-board socket mounting
* Pin style designator follows the 鈥淏鈥?after the output power and precedes the baseplate designator.
Ex. V48B24C250BN 鈥?Long ModuMate Pins
Vicor Corp.
Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
V48C5C75B DC-DC Converter
Rev. 2
Page 6 of 8
Set your site on VICOR at www.vicorpower.com
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