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参数资料
| 型号： | FC250A11 |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 100 W DC-DC REG PWR SUPPLY MODULE |
| 文件页数： | 14/16页 |
| 文件大小： | 262K |
| 代理商： | FC250A11 |
Data Sheet
July 1998
Tyco Electronics Corp.
7
18 Vdc to 36 Vdc Input, 5 Vdc Output; 50 W
FC250A1 Power Module: dc-dc Converter;
Design Considerations
Input Source Impedance
The power module should be connected to a low
ac-impedance input source. Highly inductive source
impedances can affect the stability of the power mod-
ule. For the test configuration in Figure 7, a 100 F
electrolytic capacitor (ESR < 0.7
at 100 kHz)
mounted close to the power module helps ensure sta-
bility of the unit. For other highly inductive source
impedances, consult the factory for further application
guidelines.
Safety Considerations
For safety-agency approval of the system in which the
power module is used, the power module must be
installed in compliance with the spacing and separation
requirements of the end-use safety agency standard,
i.e.,
UL 1950, CSA C22.2 No. 950-95, and VDE 0805
(EN60950, IEC950).
If the input source is non-SELV (ELV or a hazardous
voltage greater than 60 Vdc and less than or equal to
75 Vdc), for the module's output to be considered
meeting the requirements of safety extra-low voltage
(SELV), all of the following must be true:
■
The input source is to be provided with reinforced
insulation from any other hazardous voltages, includ-
ing the ac mains.
■
One VI pin and one VO pin are to be grounded, or
both the input and output pins are to be kept floating.
■
The input pins of the module are not operator acces-
sible.
■
Another SELV reliability test is conducted on the
whole system, as required by the safety agencies, on
the combination of supply source and the subject
module to verify that under a single fault, hazardous
voltages do not appear at the module's output.
Note: Do not ground either of the input pins of the
module without grounding one of the output
pins. This may allow a non-SELV voltage to
appear between the output pins and ground.
The power module has extra-low voltage (ELV) outputs
when all inputs are ELV.
The input to these units is to be provided with a maxi-
mum 15 A normal-blow fuse in the ungrounded lead.
Feature Descriptions
Overcurrent Protection
To provide protection in a fault (output overload) condi-
tion, the unit is equipped with internal current-limiting
circuitry and delayed overcurrent shutdown.
At the point of current-limit inception, the unit shifts
from voltage control to current control. If the output volt-
age is pulled very low during a severe fault, the current-
limit circuit can exhibit either foldback or tailout charac-
teristics (output current decrease or increase). If the
overcurrent persists for more than 50 ms, the unit will
latch off.
Remote On/Off
Two remote on/off options are available. Positive logic
remote on/off turns the module on during a logic-high
voltage on the ON/OFF pin, and off during a logic low.
Negative logic remote on/off turns the module off dur-
ing a logic high and on during a logic low. Negative
logic, device code suffix “1,” is the factory-preferred
configuration.
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
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 15 V. The maximum allowable
leakage current of the switch at Von/off = 15 V is 50 A.
If not using the remote on/off feature, do one of the
following to turn the unit on:
■
For negative logic, short the ON/OFF pin to VI(–).
■
For positive logic, leave the ON/OFF pin open.
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PDF描述 |
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| FC250B1 | 1-OUTPUT 250 W DC-DC REG PWR SUPPLY MODULE |
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| FC250F1 | 1-OUTPUT 165 W DC-DC REG PWR SUPPLY MODULE |
| FC250R1 | 1-OUTPUT 250 W DC-DC REG PWR SUPPLY MODULE |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| FC250B | 制造商:未知厂家 制造商全称:未知厂家 功能描述:DC-to-DC Voltage Converter |
| FC250B1 | 制造商:GE Energy (formerly Lineage Power) 功能描述:DC/DC Power Supply Single-OUT 12V 20.8A 250W |
| FC250C | 制造商:未知厂家 制造商全称:未知厂家 功能描述:DC-to-DC Voltage Converter |
| FC250C1 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:DC-to-DC Voltage Converter |
| FC250F | 制造商:未知厂家 制造商全称:未知厂家 功能描述:DC-to-DC Voltage Converter |
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