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參數(shù)資料
| 型號： | CW025AJ-M |
| 廠商： | LINEAGE POWER LLC |
| 元件分類： | 電源模塊 |
| 英文描述： | 2-OUTPUT 13.125 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | MODULE-7 |
| 文件頁數(shù)： | 5/16頁 |
| 文件大?。?/td> | 559K |
| 代理商： | CW025AJ-M |
Lineage Power
13
Data Sheet
April 2008
3 3
36Vdc to 75 Vdc Input; 25 W
CW025 Dual Output-Series Power Modules:
Thermal Considerations (continued)
Air Velocity (continued)
8-999(C)
Figure 18. 15 V Output Power Dissipation vs.
Output Current
8-988(C)
Figure 19. Total Power Dissipation vs. Local
Ambient Temperature and Air Velocity
8-989(C)
Figure 20. Case-to-Ambient Thermal Resistance vs.
Air Velocity
Use of Heat Sinks and Cold Plates
The CW025 Dual Output-Series case includes through-
threaded M3 x 0.5 mounting holes allowing attachment
of heat sinks or cold plates from either side of the mod-
ule. The mounting torque must not exceed 0.56 N/m
(5 in-lb.).
The following thermal model can be used to determine
the required thermal resistance of the sink to provide
the necessary cooling:
where PD is the power dissipated by the module,
θCS
represents the interfacial contact resistance between
the module and the sink, and
θSA is the sink-to-ambient
thermal impedance (°C/W). For thermal greases or
foils, a value of
θCS = 0.1 °C/W to 0.3 °C/W is typical.
The required
θSA is calculated from the following equa-
tion:
Note that this equation assumes that all dissipated
power must be shed by the sink. Depending on the
user-dened application environment, a more accurate
model including heat transfer from the sides and rear of
the module can be used. This equation provides a con-
servative estimate in such instances.
For further information, refer to the
Thermal Energy
Management CC-, CW-, DC-Series 25 W to 30 W
Board-Mounted Power Modules Technical Note.
0.0
0.1
0.2
0.3
0.7
0.9
0.0
0.5
1.0
1.5
2.0
3.0
OUTPUT CURRENT, IO (A)
2.5
VI = 36 V
VI = 54 V
VI = 72 V
0.8
0.4
0.5
0.6
POWER
DISSIPATION,
P
D
(W)
40
50
60
90
100
0.0
4.0
5.0
6.0
10.0
LOCAL AMBIENT TEMPERATURE, TA (
°C)
7.0
8.0
9.0
70
80
3.0
2.0
1.0
2.03 ms –1 (400 ft./min)
NATURAL
CONVECTION
1.02 ms –1 (200 ft./min)
TOTAL
POWER
DISSIPATION,
P
D
(W)
0.51 ms –1 (100 ft./min)
0.31 ms –1 (60 ft./min)
NAT
CONV
0.25
(50)
0.51
(100)
0.76
(150)
1.78
(350)
2.03
(400)
0.0
1.0
2.0
3.0
7.0
VELOCITY ms –1 (ft./min.)
4.0
5.0
6.0
1.02
(200)
1.27
(250)
1.52
(300)
THERMAL
RESISTANCE
CASE
TO
AMBIENT
(
°C/W)
PD
θCS
TA
Tc
l
Ts
θSA
TC
TA
–
PDtotal
-----------------
θCS
–
=
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