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: 7/20页
文件大小: 1173K
代理商: FC250F1
Lineage Power
15
Data Sheet
April 2008
18 Vdc to 36 Vdc Input, 3.3 Vdc Output; 165 W
FC250F1 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
1.0 inch heat sink. The minimum airflow necessary for
this module depends on heat sink fin orientation and is
shown below:
n
1.0 m/s (200 ft./min.) (oriented along width)
n
1.15 m/s (230 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
sink-to-ambient (
θsa) as shown in Figure 24.
PD
TC
TS
TA
θcs
θsa
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:
θsa
TC TA
()
PD
-------------------------
θcs
=
This equation assumes that all dissipated power must
be shed by the heat sink. Depending on the user-
defined application environment, a more accurate
model, including heat transfer from the sides and bot-
tom of the module, can be used. This equation pro-
vides a conservative estimate for such instances.
EMC Considerations
For assistance with designing for EMC compliance,
please refer to the FLTR100V10 data sheet
(DS99-294EPS).
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
(DS99-294EPS).
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