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參數(shù)資料
| 型號： | LUC025F |
| 廠商： | LINEAGE POWER LLC |
| 元件分類： | 電源模塊 |
| 英文描述： | 2-OUTPUT 16.5 W DC-DC REG PWR SUPPLY MODULE |
| 文件頁數(shù)： | 2/15頁 |
| 文件大小： | 397K |
| 代理商： | LUC025F |
10
Lineage Power
Data Sheet
April 2008
18 Vdc to 36 Vdc In; 3.3 Vdc Out; 16.5 W
LUC025F Power Module: dc-dc Converter:
Convection Requirements for Cooling
To predict the approximate cooling needed for the mod-
ule, determine the power dissipated as heat by the unit
for the particular application. Figure 17 shows typical
heat dissipation for the module over a range of output
currents.
8-3026(C)
Figure 17. LUC025F Power Dissipation vs. Output
Current, TA = 25 °C; Either Orientation
With the known heat dissipation, module orientation
with respect to airflow, and a given local ambient tem-
perature, the minimum airflow can be chosen from the
derating curves in Figures 18—19.
8-2980(C)
Figure 18. LUC025F Power Derating vs. Local
Ambient Temperature and Air Velocity;
Orientation 1
8-2981(C)
Figure 19. LUC025F Power Derating vs. Local
Ambient Temperature and Air Velocity;
Orientation 2
For example, if the LUC025F dissipates 4 W of heat at
4 A load, the minimum airflow for Orientation 1 in a 70
°C environment is 1.0 m/s (200 ft./min.).
Keep in mind that these derating curves are approxi-
mations of the ambient temperatures and airflows
required to keep the power module temperature below
its maximum rating. Once the module is assembled in
the actual system, the module’s temperature should be
checked as shown in Figures 14—16 to ensure it does
not exceed the specified temperature.
0
1
2
3
4
5
6
012345
OUTPUT CURRENT, Io (A)
PO
W
ER
D
ISSI
PAT
IO
N
,P
D
(W
)
VI = 36V
VI = 28V
VI = 18V
0
1
2
3
4
5
6
0
10
20
30
405060
7080
90
100
LOCAL AMBIENT TEMPERATURE, TA (°C)
DI
SS
IP
AT
ED
P
O
W
E
R
,P
D
(W
)
3.0 m/s (600ft./min.)
2.5 m/s (500ft./min.)
2.0 m/s (400ft./min.)
1.5 m/s (300ft./min.)
1.0 m/s (200ft./min.)
0.5 m/s (100ft./min.)
NATURAL
CONVECTION
0
1
2
3
4
5
6
0
1020
3040506070
80
90
100
LOCAL AMBIENT TEMPERATURE TA (°C)
D
ISS
IP
ATE
D
P
O
W
E
R
,P
D
(W
)
3.0 m/s (600ft./min.)
2.5 m/s (500ft./min.)
2.0 m/s (400ft./min.)
1.5 m/s (300ft./min.)
1.0 m/s (200ft./min.)
0.5 m/s (100ft./min.)
NATURAL
CONVECTION
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