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參數(shù)資料
| 型號(hào)： | FW250G1 |
| 廠商： | LINEAGE POWER LLC |
| 元件分類： | 電源模塊 |
| 英文描述： | DC-DC REG PWR SUPPLY MODULE |
| 文件頁數(shù)： | 5/20頁 |
| 文件大?。?/td> | 570K |
| 代理商： | FW250G1 |
Lineage Power
13
Data Sheet
April 2008
dc-dc Converters; 36 to 75 Vdc Input, 2.5 Vdc Output; 125 W to 150 W
FW250G1 and FW300G1 Power Modules:
Thermal Considerations
Introduction
The power modules operate in a variety of thermal
environments; however, sufcient cooling should be
provided to help ensure reliable operation of the unit.
Heat-dissipating components inside the unit are ther-
mally coupled to the case. Heat is removed by conduc-
tion, convection, and radiation to the surrounding
environment. Proper cooling can be veried by mea-
suring the case temperature. Peak temperature occurs
at the position indicated in Figure 18.
8-1303 C).a
Note: Top view, measurements shown in millimeters and (inches).
Pin locations are for reference only.
Figure 18. Case Temperature Measurement
Location
The temperature at this location should not exceed
100 °C. The maximum case temperature can be limited
to a lower value for extremely high reliability. The output
power of the module should not exceed the rated power
for the module as listed in the Ordering Information table.
For additional information about these modules, refer to
the
Thermal Management for FC- and FW-Series 250
W—300 W Board-Mounted Power Modules Technical
Note (TN96-009EPS).
Heat Transfer Without Heat Sinks
Derating curves for forced-air cooling without a heat
sink are shown in Figures 19 and 20. These curves can
set of operating conditions. For example, if the unit with
airow along its length dissipates 20 W of heat, the
correct airow in a 40 °C environment is 1.0 m/s
(200 ft./min.).
8-1315 (C)
Figure 19. Convection Power Derating with No Heat
Sink; Airow Along Width; Transverse
Orientation
8-1314 (C)
Figure 20. Convection Power Derating with No Heat
Sink; Airow Along Length;
Longitudinal Orientation
30.5
(1.20)
82.6
(3.25)
CASE
SYNC IN
VI(–)
VI(+)
VO(+)
VO(–)
SYNC OUT
MEASURE CASE
TEMPERATURE HERE
ON/OFF
0
10
203040
100
0
40
60
70
LOCAL AMBIENT TEMPERATURE, TA (
°C)
POWER
DISSIPATION,
P
D
(W)
30
20
10
90
80
70
60
50
0.1 m/s (20 ft./min.)
NAT. CONV.
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
10
203040
100
0
40
60
70
LOCAL AMBIENT TEMPERATURE, TA (
°C)
POWER
DISSIPATION,
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.)
NAT. CONV.
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