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参数资料
| 型号： | FC050B9 |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 50 W DC-DC REG PWR SUPPLY MODULE |
| 文件页数： | 15/16页 |
| 文件大小： | 1568K |
| 代理商： | FC050B9 |
8
Tyco Electronics Corp.
Data Sheet
May 1998
18 Vdc to 36 Vdc Input, 12 Vdc Output; 50 W to 100 W
FC050B and FC100B Power Modules: dc-dc Converters;
Feature Descriptions
Remote On/Off
To turn the power module on and off, the user must
supply a switch to control the voltage between the on/off
terminal and the VI(–) terminal (Von/off). The switch can be
an open collector or equivalent (see Figure 12). A logic
low is Von/off = 0 V to 1.2 V, during which the module is on.
The maximum Ion/off during a logic low is 1 mA. The switch
should maintain a logic-low voltage while sinking 1 mA.
During a logic high, the maximum Von/off generated by
the power module is 18 V. The maximum allowable
leakage current of the switch at Von/off = 18 V is 50 A.
If not using the remote on/off feature, short the
ON/OFF pin to VI(–).
8-580(C).b
Figure 12. Remote On/Off Implementation
Remote Sense
Remote sense minimizes the effects of distribution
losses by regulating the voltage at the remote-sense
connections. For single-unit operation, the PARALLEL
pin should be connected to SENSE(–). The voltage
between the remote-sense pins and the output termi-
nals must not exceed the output voltage sense range
given in the Feature Specications table, i.e.:
[VO(+) – VO(–)] – [SENSE(+) – SENSE(–)]
≤ 1.2 V
The voltage between the VO(+) and VO(–) terminals
must not exceed the minimum output overvoltage
clamp value shown in the Feature Specications table.
This limit includes any increase in voltage due to
remote-sense compensation and output voltage set-
point adjustment (trim), see Figure 13.
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.
8-651(C).e
Figure 13. Effective Circuit Conguration for
Single-Module Remote-Sense Operation
Output Voltage Set-Point Adjustment (Trim)
When not using the trim feature, leave the TRIM pin open.
Adjustment with TRIM Pin
Output voltage adjustment allows the output voltage
set point to be increased or decreased by adjusting an
external resistor connected between the TRIM pin and
either the SENSE(+) or SENSE(–) pins (see Figure 14
and Figure 15).
Connecting the external resistor (Rtrim-up) between the
TRIM and SENSE(–) pins (VO, adj) increases the output
voltage set point as dened in the following equation:
Connecting the external resistor (Rtrim-down) between
the TRIM and SENSE(+) pins (VO, adj) decreases the
output voltage set point as dened in the following
equation:
The voltage between the VO(+) and VO(–) terminals
must not exceed the minimum output overvoltage
clamp value shown in the Feature Specications table.
This limit includes any increase in voltage due to
remote-sense compensation and output voltage set-
point adjustment (trim), see Figure 13.
+
Ion/off
–
Von/off
CASE
ON/OFF
VI(+)
VI(–)
PARALLEL
SENSE(+)
SENSE(–)
VO(+)
VO(–)
VO(+)
PARALLEL
SENSE(+)
SENSE(–)
VO(–)
VI(+)
VI(–)
IO
LOAD
CONTACT AND
DISTRIBUTION LOSSES
SUPPLY
II
CONTACT
RESISTANCE
Rtrim-up
1.25
16.9
×
VO adj
,
12
–
-----------------------------
k
=
Rtrim-down
VO, adj
1.25
–
() 16.9
×
12
VO, adj
–
--------------------------------------------------------
k
=
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相关代理商/技术参数 |
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