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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)： | 7/20頁 |
| 文件大?。?/td> | 434K |
| 代理商： | FW300F1 |
Lineage Power
15
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 Without Heat Sinks
Derating curves for forced-air cooling without a heat
be used to determine the appropriate airflow for a given
set of operating conditions. For example, if the unit with
airflow along its length dissipates 20 W of heat, the
correct airflow in a 40 °C environment is 1.0 m/s
(200 ft./min.).
8-1315 (C)
Figure 25. Convection Power Derating with No Heat
Sink; Airflow Along Width (Transverse)
8-1314 (C)
Figure 26. Convection Power Derating with No Heat
Sink; Airflow Along Length
(Longitudinal)
Heat Transfer with Heat Sinks
The power modules have through-threaded, M3 x 0.5
mounting holes, which enable heat sinks or cold plates
to be attached to the module. The mounting torque
must not exceed 0.56 N-m (5 in.-lb.). For the screw
attachment from the pin side, the recommended hole
size on the customer’s PWB around the mounting
holes is 0.130 ± 0.005 inches. If a larger hole is used,
the mounting torque from the pin side must not exceed
0.25 N-m (2.2 in.-lbs.).
Thermal derating with heat sinks is expressed by using
the overall thermal resistance of the module. Total
module thermal resistance (
θca) is defined as the max-
imum case temperature rise (
ΔTC, max) divided by the
module power dissipation (PD):
The location to measure case temperature (TC) is
shown in Figure 24. Case-to-ambient thermal resis-
tance vs. airflow for various heat sink configurations is
shown in Figure 27 and Figure 28. These curves were
obtained by experimental testing of heat sinks, which
are offered in the product catalog.
8-1321 (C)
Figure 27. Case-to-Ambient Thermal Resistance
Curves; Transverse Orientation
0
10203040
1 00
0
40
60
70
LOCAL AMBIEN T T EMPERAT URE, TA (C)
P
O
W
E
R
D
IS
S
IP
A
T
IO
N
,
P
D
(W
)
30
20
10
90
80
70
60
50
4.0 m/s (800 ft./ min.)
3.5 m/s (700 ft./ min.)
3.0 m/s (600 ft./ min.)
2.5 m/s (500 ft./ min.)
2.0 m/s (400 ft./ min.)
1.5 m/s (300 ft./ min.)
1.0 m/s (200 ft./ min.)
0.5 m/s (100 ft./ min.)
0. 1 m/ s (20 ft./min.) N A T. C ON V.
0
10203040
1 00
0
40
60
70
LOCAL AMBIENT TEMPERAT URE, TA (C)
P
O
W
E
R
D
IS
S
IP
A
T
IO
N
,
P
D
(W
)
30
20
10
90
80
70
60
50
4.0 m/s (800 ft./min .)
3.5 m/s (700 ft./min .)
3.0 m/s (600 ft./min .)
2.5 m/s (500 ft./min .)
2.0 m/s (400 ft./min .)
1.5 m/s (300 ft./min .)
1.0 m/s (200 ft./min .)
0.5 m/s (100 ft./min .)
50
0.1m/s (20ft. /min.) NAT . CO NV.
θca
ΔTCmax
,
PD
---------------------
TC
TA
–
()
PD
------------------------
==
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
1.5
AIR VELOCITY, m/s (ft./min.)
00.5
(100)
1.0
(200)
1.5
(300)
2.0
(400)
2.5
(500)
3.0
(600)
CASE-TO-AMBIENT
THERMAL
RESISTANCE,
R
CA
(C/W)
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