JAHW075A Lineage Power, JAHW075A Datasheet - Page 14

• Manufacturer Part Number: JAHW075A
• Manufacturer: Lineage Power

dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 to 100 W
Thermal Considerations
Heat Transfer Without Heat Sinks
Figure 28. JAHW050A and JAHW075A Forced
Figure 29.JAHW100A Forced Convection Power
14
14
2 0
1 8
1 6
1 4
1 2
1 0
8
6
4
2
0
12
9
6
3
0
0
0
N A T U R A L C O N V E C T IO N
NATURAL CONVECTION
Derating with No Heat Sink; Either
Orientation
1 0
10
Convection Power Derating with No Heat
Sink; Either Orientation
L O C A L A M B IE N T T E M P E R A T U R E , T
4 .0 m /s (8 0 0 ft./m in .)
3 .0 m /s (6 0 0 ft./m in .)
2 .0 m /s (4 0 0 ft./m in .)
1 .0 m /s (2 0 0 ft./m in .)
0 .5 m /s (1 0 0 ft./m in .)
LOCAL AMBIENT TEMPERATURE, T
4.0 m/s (800 ft./min.)
3.0 m/s (600 ft./min.)
2.0 m/s (400 ft./min.)
1.0 m/s (200 ft./min.)
0.1 m/s (20 ft./min.)
2 0
20
30
3 0
40
4 0
50
5 0
60
6 0
(continued)
70
7 0
80
A
8 0
(continued)
A
(°C)
(°C )
90
9 0
8-2236 (F)
100
1-0464
1 0 0
Figure 30. JAHW050A Power Dissipation vs.
Figure 31. JAHW075A Power Dissipation vs.
10
9
8
7
6
5
4
3
8
7
6
5
4
3
0
0
1
Output Current at 25 °C
Output Current at 25 °C
1
2
3
2
V
V
V
I
I
I
OUTPUT CURRENT, I
OUTPUT CURRENT, I
4
= 75 V
= 48 V
= 36 V
3
5
4
6
7
5
8
6
9
O
10
O
7
(A)
(A)
11 12 13 14 15
Lineage Power
V
V
V
April 2008
8
I
I
I
= 75 V
= 48 V
= 36 V
9
8-2243 (F)
8-2238 (F)
10