参数资料
型号: FC400R1-29
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: 2/18页
文件大小: 521K
代理商: FC400R1-29
10
Tyco Electronics Corp.
Advance Data Sheet
July 2001
18 Vdc to 36 Vdc Input, 28 Vdc Output; 400 W
FC400R1-29 Power Module; dc-dc Converter:
Feature Descriptions (continued)
Output Voltage Set-Point Adjustment
(Trim) (continued)
The amount of power delivered by the module is
defined as the voltage at the output terminals multiplied
by the output current. When using remote sense and
trim, the output voltage of the module can be
increased, which at the same output current would
increase the power output of the module. Care should
be taken to ensure that the maximum output power of
the module remains at or below the maximum rated
power.
8-748 (F).b
Figure 13. Circuit Configuration to Decrease
Output Voltage
8-715 (F).b
Figure 14. Circuit Configuration to Increase
Output Voltage
Output Overvoltage Protection
The output voltage is monitored at the VO(+) and VO(–)
pins of the module. If the voltage at these pins exceeds
the value indicated in the Feature Specifications table,
the module will shut down and latch off. Recovery from
latched shutdown is accomplished by cycling the dc
input power off for at least 1.0 second or toggling the
primary referenced on/off signal for at least 1.0 second.
Output Current Monitor
The CURRENT MON pin provides a dc voltage propor-
tional to the dc output current of the module given in
the Feature Specifications table. For example, on the
FC400R1-29, the V/A ratio is set at 370 mV/A ± 10% @
70
°C case. At a load current of 9 A, the voltage on the
CURRENT MON pin is 3.33 V. The current monitor sig-
nal is referenced to the SENSE(–) pin on the second-
ary and is supplied from a source impedance of
approximately 2 k
. It is recommended that the
CURRENT MON pin be left open when not in use,
although no damage will result if the CURRENT MON
pin is shorted to secondary ground. Directly driving the
CURRENT MON pin with an external source will
detrimentally affect operation of the module and should
be avoided.
Synchronization
Any module can be synchronized to any other module
or to an external clock using the SYNC IN or SYNC
OUT pins. The modules are not designed to operate in
a master/slave configuration; that is, if one module fails,
the other modules will continue to operate.
SYNC IN Pin
This pin can be connected either to an external clock or
directly to the SYNC OUT pin of another FW250x or
FW300x module.
If an external clock signal is applied to the SYNC IN
pin, the signal must be a 500 kHz (±50 kHz) square
wave with a 4 Vp-p amplitude. Operation outside this
frequency band will detrimentally affect the perfor-
mance of the module and must be avoided.
If the SYNC IN pin is connected to the SYNC OUT pin
of another module, the connection should be as direct
as possible, and the VI(–) pins of the modules must be
shorted together.
Unused SYNC IN pins should be tied to VI(–). If the
SYNC IN pin is unused, the module will operate from
its own internal clock.
SYNC OUT Pin
This pin contains a clock signal referenced to the VI(–)
pin. The frequency of this signal will equal either the
module’s internal clock frequency or the frequency estab-
lished by an external clock applied to the SYNC IN pin.
VI(+)
VI(–)
ON/OFF
CASE
VO(+)
VO(–)
SENSE(+)
TRIM
SENSE(–)
Radj-down
RLOAD
VI(+)
VI(–)
ON/OFF
CASE
VO(+)
VO(–)
SENSE(+)
TRIM
SENSE(–)
Radj-up
RLOAD
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