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参数资料
| 型号： | FC250H1 |
| 厂商： | LINEAGE POWER LLC |
| 元件分类： | 电源模块 |
| 英文描述： | DC-DC REG PWR SUPPLY MODULE |
| 封装： | MODULE-20 |
| 文件页数： | 7/20页 |
| 文件大小： | 564K |
| 代理商： | FC250H1 |
Lineage Power
15
Data Sheet
April 2008
18 Vdc to 36 Vdc Input, 24 Vdc Output; 250 W
FC250H1 Power Module: dc-dc Converter;
Thermal Considerations (continued)
Heat Transfer with Heat Sinks (continued)
Use Figures 21 and 22 to determine air velocity for the
1/2 inch heat sink. The minimum airow necessary for
this module depends on heat sink n orientation and is
shown below:
s
1.75 m/s (350 ft./min.) (oriented along width)
s
2.25 m/s (450 ft./min.) (oriented along length)
Custom Heat Sinks
A more detailed model can be used to determine the
required thermal resistance of a heat sink to provide
necessary cooling. The total module resistance can be
separated into a resistance from case-to-sink (
θcs) and
θsa) as shown in Figure 24.
8-1304 (C)
Figure 24. Resistance from Case-to-Sink and Sink-
to-Ambient
For a managed interface using thermal grease or foils,
a value of
θcs = 0.1 °C/W to 0.3 °C/W is typical. The
solution for heat sink resistance is:
This equation assumes that all dissipated power must
be shed by the heat sink. Depending on the user-
dened application environment, a more accurate
model, including heat transfer from the sides and bot-
tom of the module, can be used. This equation provides
a conservative estimate for such instances.
EMC Considerations
For assistance with designing for EMC compliance,
please refer to the FLTR100V10 data sheet
(DS98-152EPS).
Layout Considerations
Copper paths must not be routed beneath the power
module mounting inserts. For additional layout guide-
lines, refer to the FLTR100V10 data sheet
(DS98-152EPS).
PD
TC
TS
TA
cs
sa
θsa
TC
TA
–
()
PD
-------------------------
θcs
–
=
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