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参数资料
| 型号： | FC250F1 |
| 厂商： | LINEAGE POWER LLC |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 165 W DC-DC REG PWR SUPPLY MODULE |
| 封装： | MODULE-20 |
| 文件页数： | 19/20页 |
| 文件大小： | 1173K |
| 代理商： | FC250F1 |
88
Lineage Power
18 Vdc to 36 Vdc Input, 3.3 Vdc Output; 165 W
FC250F1 Power Module: dc-dc Converter;
Data Sheet
April 2008
Test Configurations
TO OSCILLOSCOPE
12 H
VI(+)
VI(–)
BAT TERY
LTES T
Cs 220 F
ESR < 0.1
@ 20 °C, 100 kHz
100 F
ESR < 0.3
@ 100 kHz
8-203 (C).o
Note: Measure input reflected-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 Reflected-Ripple Test Setup
V O(+)
V O(–)
1.0 F
RESISTIVE
LOAD
SCOPE
COPPER STRIP
10.0 F
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
VI(–)
VO(+)
SENSE(+)
SENSE(–)
VO(–)
VI(+)
IO
LOAD
CONTACT AND
DISTRIBUTION LOSSES
SUPPLY
II
CONTACT
RESISTANCE
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.
η
VO +
() –VO –
()
[]IO
VI +
() –VI –
()
[]II
--------------------------------------------------
x 100
%
=
Figure 10. Output Voltage and Efficiency
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 configuration 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., UL-1950, CSA 22.2 No. 95-950, 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.
If the input meets extra-low voltage (ELV) require-
ments, then the converter’s output is considered 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 specified range.
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