参数资料
型号: V24A48M400AS2
元件分类: 电源模块
英文描述: 1-OUTPUT 400 W DC-DC REG PWR SUPPLY MODULE
文件页数: 3/4页
文件大小: 257K
代理商: V24A48M400AS2
10
Control Functions - SC Pin
Control Functions - PR Pin
Output Voltage Programming. The output voltage of the converter can be adjusted or
programmed via fixed resistors, potentiometers, or voltage DACs. See Figures 4 and 5.
RU (ohms) =
1,000 (Vout-1.23) Vnom
– 1,000
1.23 (Vout-Vnom)
RD (ohms) =
1,000 Vout
Vnom - Vout
Trim-Down.
1. This converter is not a constant power
device – it has a constant current limit.
Hence, available output power is reduced
by the same percentage that output
voltage is trimmed down. Do not exceed
maximum rated output current.
2. The trim-down resistor must
be connected to the –Sense pin
(–Out pin on a micro).
Trim-Up.
1. The converter is rated for a maximum
delivered power. To ensure that
maximum rated power is not
exceeded, reduce maximum output
current by the same percentage
increase in output voltage.
2. The trim-up resistor must be
connected to the +Sense pin.
(+Out pin on a micro).
3. Do not trim the converter above
maximum trim range (typically +10%)
or the output overvoltage protection
circuitry may be activated.
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:
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 6.
AC coupled single-wire interface. All PR
pins are connected to a single communication
bus through 0.001F (500V) capacitors.
This interface supports current sharing
and is fault tolerant except for the
communication bus. See Figure 7.
+Out
+S
SC
–S
–Out
RU
Trim Up
Load
Error
Amp
1k
1.23V
0.033
F
Figure 5 – Output voltage trim-up circuit
(Micro inset)
Load
+Out
+S
SC
–S
–Out
RD
Trim Down
Error
Amp
1k
1.23V
0.033
F
Figure 4 – Output voltage trim-down circuit
(Micro inset)
+In
PC
PR
–In
Module 2
(up to 12)
+In
PC
PR
–In
Module 1
Ground plane
Figure 7 – AC coupled single-wire interface
+In
PC
PR
–In
Module 2
(up to 12)
+In
PC
PR
–In
Module 1
Ground plane
Figure 6 – DC coupled single-wire interface
0.001F
Load
RD
Trim Down
Error
Amp
1k
1.23V
0.033
F
+Out
SC
–Out
RU
Trim Up
Load
Error
Amp
1k
1.23V
0.033
F
+Out
SC
–Out
Note:
Please consult the
appropriate Vicor Design
Guide for additional
information regarding the
use of these products.
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