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參數(shù)資料
| 型號： | FW300F1 |
| 廠商： | LINEAGE POWER LLC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT 198 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | MODULE-20 |
| 文件頁數(shù)： | 8/20頁 |
| 文件大?。?/td> | 434K |
| 代理商： | FW300F1 |
16
Lineage Power
Data Sheet
April 2008
dc-dc Converters; 36 to 75 Vdc Input, 3.3 Vdc Output; 165 W to 198 W
FW250F1 and FW300F1 Power Modules:
Thermal Considerations (continued)
Heat Transfer with Heat Sinks (continued)
8-1320 (C)
Figure 28. Case-to-Ambient Thermal Resistance
Curves; Longitudinal Orientation
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 Figures 27 and
28 had a thermal-conductive dry pad between the case
and the heat sink to minimize contact resistance.
To choose a heat sink, determine the power dissipated
as heat by the unit for the particular application.
Figure 29 shows typical heat dissipation for a range of
output currents and three voltages for the FW250F1
and FW300F1.
8-1737 (C)
Figure 29. FW250F1 and FW300F1 Power
Dissipation vs. Output Current
Example
If an 85 °C case temperature is desired, what is the
minimum airflow necessary? Assume the FW300F1
module is operating at nominal line and an output cur-
rent of 50 A, maximum ambient air temperature of
40 °C, and the heat sink is 0.5 inch.
Solution
Given: VI = 54 V
IO = 50 A
TA = 40 °C
TC = 85 °C
Heat sink = 0.5 inch.
PD = 42 W
00.5
(100)
1.0
(200)
1.5
(300)
2.0
(400)
2.5
(500)
3.0
(600)
0.0
0.5
3.0
3.5
4.0
4.5
2.5
2.0
1.0
1 1/2 IN. HEAT SINK
1 IN. HEAT SINK
1/2 IN. HEAT SINK
1/4 IN. HEAT SINK
NO HEAT SINK
CASE-TO-AMBIENT
THERMAL
RESISTANCE,
1.5
AIR VELOCITY, m/s (ft./min.)
R
CA
(C/W)
1 0
2 0
30
40
50
60
0
50
30
20
40
0
60
10
OUT PUT CURRENT, IO (A)
P
O
W
E
R
D
IS
S
IP
A
T
IO
N
,
P
D
(W
)
VI =72 V
VI =54 V
VI =36 V
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