參數(shù)資料
型號(hào): LW030F81
廠商: LINEAGE POWER LLC
元件分類: 電源模塊
英文描述: 1-OUTPUT 19.8 W DC-DC REG PWR SUPPLY MODULE
封裝: MODULE-10
文件頁(yè)數(shù): 3/16頁(yè)
文件大?。?/td> 514K
代理商: LW030F81
Lineage Power
11
Data Sheet
April 2008
36 Vdc to 75 Vdc Inputs; 19.8 W to 30 W
LW030-Series Power Modules:
Thermal Considerations (continued)
Heat Transfer Without Heat Sinks
The thermal data presented in this section is based on
measurements taken in a wind tunnel. The test setup
shown in Figure 16 was used to collect data for
Figure 17.
Increasing airflow over the module enhances the heat
transfer via convection. Figure 17 shows the maximum
power that can be dissipated by the modules without
exceeding the maximum case temperature versus local
ambient temperature (TA) for natural convection
through 3.05 ms–1 (600 ft./min.)
Note that the natural convection condition was mea-
sured at 0.05 ms–1 to 0.1 ms–1 (10 ft./min. to
20 ft./min.); however, systems in which these power
modules may be used typically generate natural con-
vection airflow rates of 0.3 ms–1 (60 ft./min.) due to
other heat-dissipating components in the system. Use
of Figure 17 is shown in the following example.
Example
What is the minimum airflow necessary for a LW030A
operating at VI = 56 V, IO = 5.0 A, and a maximum
ambient temperature of 80 °C?
Solution:
Given: VI = 56 V, IO = 5.0 A, TA = 80 °C
Determine PD (Figure 19): PD = 6.0 W
Determine airflow (Figure 17): v = 1.02 ms–1
(200 ft./min.)
8-1155(C)
Figure 17. LW030A and LW030F Convection
Derating Power Derating with No Heat
Sink; Either Orientation
8-2778(C)
Figure 18. LW030F871 Power Dissipation vs.
Output Current
8-1267(C)
Figure 19. LW030A Power Dissipation vs. Output
Current
40
50
60
70
100
0
5
6
7
8
LOCAL AMBIENT TEMPERATURE, TA (C)
4
3
2
1
80
90
9
30
3.05 ms-1 (600 ft./min.)
2.03 ms-1 (400 ft./min.)
1.02 ms-1 (200 ft./min.)
0.51 ms-1 (100 ft./min.)
NATURAL
CONVECTION
PO
WER
DISSIP
A
TION,
P
D
(W)
7
2
0
4
6
8
1
3
5
VI = 75 V
VI = 36 V
VI = 48 V
12345
6
PO
WER
DISSIP
A
TION,
P
D
(W)
0
OUTPUT CURRENT, IO(A)
0
12345
6
0
2
4
6
8
OUTPUT CURRENT, IO (A)
PO
WER
DISSIP
A
TION,
P
D
(W)
10
VI = 75 V
VI = 36 V
VI = 56 V
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