參數(shù)資料
型號(hào)： FC250H1
廠商： LINEAGE POWER LLC
元件分類： 電源模塊
英文描述： DC-DC REG PWR SUPPLY MODULE
封裝： MODULE-20
文件頁(yè)數(shù)： 19/20頁(yè)
文件大?。?/td> 564K
代理商： FC250H1
8
Lineage Power
Data Sheet
April 2008
18 Vdc to 36 Vdc Input, 24 Vdc Output; 250 W
FC250H1 Power Module: dc-dc Converter;
Test Congurations
8-203 (C).o
Note: Measure input reected-ripple current with a simulated source
inductance (LTEST) of 12 H. Capacitor CS offsets possible bat-
tery impedance. Measure current as shown above.
Figure 8. Input Reected-Ripple Test Setup
8-513 (C).m
Note: Use a 0.1 F ceramic capacitor and a 10 F aluminum or
tantalum capacitor. Scope measurement should be made
using a BNC socket. Position the load between 50 mm and
76 mm (2 in. and 3 in.) from the module.
Figure 9. Peak-to-Peak Output Noise
Measurement Test Setup
8-683 (C).f
Note: All measurements are taken at the module terminals. When
socketing, place Kelvin connections at module terminals to
avoid measurement errors due to socket contact resistance.
Figure 10. Output Voltage and Efciency
Measurement Test Setup
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 conguration in Figure 8, a 100 F
electrolytic capacitor (ESR < 0.3
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.,
UL1950, CSA C22.2 No. 950-95, and VDE 0805
(EN60950, IEC950).
For the converter output to be considered meeting the
requirements of safety extra-low voltage (SELV), the
input must meet SELV requirements.
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 25 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 can endure current limiting for an unlim-
ited duration. At the point of current-limit inception, the
unit shifts from voltage control to current control. If the
output voltage is pulled very low during a severe fault,
the current-limit circuit can exhibit either foldback or
tailout characteristics (output-current decrease or
increase). The unit operates normally once the output
current is brought back into its specied range.
TO OSCILLOSCOPE
12 H
VI(+)
VI(–)
BATTERY
LTEST
Cs 220 F
ESR < 0.1
@ 20
°C, 100 kHz
100 F
ESR < 0.3
@ 100 kHz
VO(+)
VO(–)
1.0 F
RESISTIVE
LOAD
SCOPE
COPPER STRIP
10.0 F
VI(–)
VO(+)
SENSE(+)
SENSE(–)
VO(–)
VI(+)
IO
LOAD
CONTACT AND
DISTRIBUTION LOSSES
SUPPLY
II
CONTACT
RESISTANCE
η
VO +
() – VO –
()
[]IO
VI +
() – VI –
()
[]II
--------------------------------------------------
x 100
%
=
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