LW025F Ver la hoja de datos (PDF) - Tyco Electronics
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LW025F Datasheet PDF : 16 Pages
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Advance Data Sheet
March 1999
LW025 Single-Output-Series Power Modules:
36 Vdc to 75 Vdc Inputs; 25 W
Thermal Considerations (continued)
6
Heat Transfer (continued)
5
4
5
3
4
3
MAX CASE
TEMPURATURE
1.0 ms -1 (600 ft./min.)
2
2.0 ms -1 (400 ft./min.)
3.0 ms -1 (200 ft./min.)
NATURAL
1
CONVECTION
0
40 50 60 70 80 90 100 110
MAX AMBIENT TEMPERATURE, TA (˚C)
8-2477(C)
Note: Conversion factor for linear feet per minute to meters per
second: 200 ft./min. = 1 ms–1.
Figure 15. LW025F Forced Convection Power
Derating; Either Orientation
9
8
MAX CASE TEMPERATURE
7
6
5
4
3 NATURAL CONVECTION
1.0 ms-1 (200 ft./min.)
2
2.0 ms-1 (400 ft./min.)
1
3.0 ms-1 (600 ft./min.)
0
40 50 60 70 80
90 100 110
MAX AMBIENT TEMPERATURE, TA (˚C)
8-1985(C)
Note: Conversion factor for linear feet per minute to meters per
second: 200 ft./min. = 1 ms–1.
Figure 16. LW025A Forced Convection Power
Derating; Either Orientation
2
VI = 75 V
1
VI = 48 V
VI = 36 V
0
0.4 0.9 1.4 1.9 2.4 2.9 3.4 3.9 4.4 4.9
OUTPUT CURRENT, I O (A)
8-2479(C)
Figure 17. LW025F Power Dissipation vs. Output
Current, TA = 25 °C
8
7
6
5
4
3
2
1
0
0.5 1
VI = 75 V
VI = 48 V
VI = 36 V
1.5 2 2.5 3 3.5 4
OUTPUT CURRENT, IO (A)
4.5 5
8-1888(C).a
Figure 18. LW025A Power Dissipation vs. Output
Current, TA = 25 °C
Tyco Electronics Corp.
11
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