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参数资料
| 型号： | FC050B9 |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 50 W DC-DC REG PWR SUPPLY MODULE |
| 文件页数： | 3/16页 |
| 文件大小： | 1568K |
| 代理商： | FC050B9 |
Tyco Electronics Corp.
11
Data Sheet
May 1998
18 Vdc to 36 Vdc Input, 12 Vdc Output; 50 W to 100 W
FC050B and FC100B Power Modules: dc-dc Converters;
Thermal Considerations (continued)
Heat Transfer with Heat Sinks (continued)
8-696(C)
Figure 20. Heat Sink Resistance Curves; Fins
Oriented Along Width
8-697(C)
Figure 21. Heat Sink Resistance Curves; Fins
Oriented Along Length
These measured resistances are from heat transfer
from the sides and bottom of the module as well as the
top side with the attached heat sink; therefore, the
case-to-ambient thermal resistances shown are gener-
ally lower than the resistance of the heat sink by itself.
The module used to collect the data in Figure 20 and
Figure 21 had a thermal-conductive dry pad between
the case and the heat sink to minimize contact resis-
tance.
To choose a heat sink, determine the power dissipated
as heat by the unit for the particular application.
Figure 22 shows typical heat dissipation for a range of
output currents and three voltages for the FC050B and
FC100B.
8-762(C)
Figure 22. Power Dissipation as Heat vs. Output
Current
Example
If an 85 °C case temperature is desired, what is the
minimum airow necessary? Assume the FC100B
module is operating at nominal line and an output cur-
rent of 7.4 A, maximum ambient air temperature of
60 °C, and the heat sink is 0.5 inch.
Solution
Given: VI = 28 V
IO = 7.4 A
TA = 60 °C
TC = 85 °C
Heat sink = 0.5 inch.
PD = 13.3 W
Then solve the following equation:
for the 0.5 inch heat sink. The minimum airow neces-
sary for the FC100B module depends on heat sink n
orientation and is shown below:
s
0.4 m/s (80 ft./min.) (oriented along width)
s
0.45 m/s (90 ft./min.) (oriented along length)
5.0
4.0
3.0
2.0
1.0
0.0
NAT
CONV
0.5
(100)
1.0
(200)
1.5
(300)
2.0
(400)
2.5
(500)
THERMAL
RESISTANCE,
(
°C/W)
AIR VELOCITY, m/s (ft./min.)
NO HEAT SINK
0.5 in. HEAT SINK
1 in. HEAT SINK
0.25 in. HEAT SINK
5.0
4.0
3.0
2.0
1.0
0.0
NAT
CONV
0.5
(100)
1.0
(200)
1.5
(300)
2.0
(400)
2.5
(500)
THERMAL
RESISTANCE,
(
°C/W)
AIR VELOCITY, m/s (ft./min.)
NO HEAT SINK
0.5 in. HEAT SINK
1 in. HEAT SINK
0.25 in. HEAT SINK
POWER
DISSIPATION,
P
D
(W)
OUTPUT CURRENT, IO (A)
18
0
10
8
6
4
2
1
2
3456
78
9
16
14
12
VI = 18 V
VI = 27 V
VI = 36 V
θca
TC
TA
–
()
PD
------------------------
=
θca
85
60
–
()
13.3
------------------------
=
θca 1.88 °C/W
=
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相关代理商/技术参数 |
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| FC050F | 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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