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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： | 18/18页 |
| 文件大小： | 521K |
| 代理商： | FC400R1-29 |
Tyco Electronics Corp.
9
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)
Remote Sense
Remote sense minimizes the effects of distribution
losses by regulating the voltage at the remote-sense
connections. The voltage between the remote-sense
pins and the output terminals must not exceed the out-
put voltage sense range given in the Feature Specifica-
tions table, i.e.:
[VO(+) – VO(–)] – [SENSE(+) – SENSE(–)]
≤ 0.5 V
The voltage between the VO(+) and VO(–) terminals
must not exceed the minimum value indicated in the
output overvoltage shutdown section of the Feature
Specifications table. This limit includes any increase in
voltage due to remote-sense compensation and output
voltage set-point adjustment (trim), see Figure 12.
If not using the remote-sense feature to regulate the out-
put at the point of load, connect SENSE(+) to VO(+) and
SENSE(–) to VO(–) at the module.
Although the output voltage can be increased by both
the remote sense and by the trim, the maximum
increase for the output voltage is not the sum of both.
The maximum increase is the larger of either the
remote sense or the trim. Consult the factory if you
need to increase the output voltage more than the
above limitation.
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.
8-651 (F).e
Figure 12. Effective Circuit Configuration for
Single-Module Remote-Sense Operation
Output Voltage Set-Point Adjustment
(Trim)
Output voltage trim allows the user to increase or
decrease the output voltage set point of a module. This
is accomplished by connecting an external resistor
between the TRIM pin and either the SENSE(+) or
SENSE(–) pins. The trim resistor should be positioned
close to the module.
If not using the trim feature, leave the TRIM pin open.
With an external resistor between the TRIM and
SENSE(–) pins (Radj-down), the output voltage set point
tion determines the required external-resistor value to
obtain a percentage output voltage change of
%.
With an external resistor connected between the TRIM
and SENSE(+) pins (Radj-up), the output voltage set
The following equation determines the required exter-
nal-resistor value to obtain a percentage output voltage
change of
%.
Note: Only trim up to 0.5 V maximum. The output
voltage of this module may be increased to a
maximum of 0.5 V. The 0.5 V is the combination
of both the remote sense and the output voltage
set-point adjustment (trim). Do not exceed
28.5 V between the VO(+) and VO(–) terminals.
Although the output voltage can be increased by both
the remote sense and by the trim, the maximum
increase for the output voltage is not the sum of both.
The maximum increase is the larger of either the
remote sense or the trim. Consult the factory if you
need to increase the output voltage more than the
above limitation.
LOAD
CONTACT AND
SUPPLY
II
CONTACT
VI(–)
VI(+)
SENSE(+)
SENSE(–)
VO(–)
VO(+)
DISTRIBUTION LOSSES
RESISTANCE
IO
Radj-down
205
%
----------2.255
–
k
=
Radj-up
VO, nom 1
%
100
---------
+
1.225
–
1.225
%
()
-----------------------------------------------------------------205
2.255
–
k
=
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