JAW050F Lineage Power, JAW050F Datasheet - Page 12

• Manufacturer Part Number: JAW050F
• Manufacturer: Lineage Power

36 Vdc to 75 Vdc Input, 3.3 Vdc Output; 33 W to 50 W
Thermal Considerations
Heat Transfer Without Heat Sinks
Figure 21. Forced Convection Power Derating with
Figure 22. Forced Convection Power Derating with
Heat Transfer with Heat Sinks
The power modules have through-threaded, M3 x 0.5
mounting holes, which enable heat sinks or cold plates
to attach to the module. The mounting torque must not
exceed 0.56 N-m (5 in.-lb.).
12
12
20
18
16
14
12
10
20
18
16
14
12
10
8
6
4
2
0
8
6
4
2
0
0
0
(200 ft./min.)
(400 ft./min.)
(200 ft./min.)
(400 ft./min.)
(20 ft./min.)
(20 ft.min.)
0.1 m/s
1.0 m/s
2.0 m/s
0.1 m/s
1.0 m/s
2.0 m/s
No Heat Sink; Longitudinal Orientation
No Heat Sink; Transverse Orientation
10
10
LOCAL AMBIENT TEMPERATURE, T
LOCAL AMBIENT TEMPERATURE, T
20
20
30
30
40
40
50
50
60
60
(continued)
70
70
(600 ft./min.)
(800 ft./min.)
(600 ft./min.)
(800 ft./min.)
80
80
A
A
(continued)
3.0 m/s
4.0 m/s
3.0 m/s
4.0 m/s
(°C)
(°C)
90 100
90 100
8-2465 (F)
8-2466 (F)
Thermal derating with heat sinks is expressed by using
the overall thermal resistance of the module. Total
module thermal resistance (θca) is defined as the max-
imum case temperature rise (ΔT
module power dissipation (P
The location to measure case temperature (T
shown in Figure 18. Case-to-ambient thermal resis-
tance vs. airflow for various heat sink configurations
and heights is shown in Figures 23 and 24. These
curves were obtained by experimental testing of heat
sinks, which are offered in the product catalog.
Figure 23. Case-to-Ambient Thermal Resistance
Figure 24. Case-to-Ambient Thermal Resistance
θ
ca
9
8
7
6
5
4
3
2
1
0
8
7
6
5
4
3
2
1
0
0
0
=
Curves; Longitudinal Orientation
Curves; Transverse Orientation
ΔT
-------------------- -
(100)
(100)
0.5
0.5
P
C max
,
D
AIR VELOCITY, m/s (ft./min.)
AIR VELOCITY, m/s (ft./min.)
(200)
(200)
1.0
1.0
=
(
----------------------- -
T
(300)
(300)
D
C
NO HEAT SINK
1/4 IN. HEAT SINK
1/2 IN. HEAT SINK
1 IN. HEAT SINK
1 1/2 IN. HEAT SINK
1.5
1.5
):
P
–
D
C, max
T
NO HEAT SINK
1/4 IN. HEAT SINK
1/2 IN. HEAT SINK
1 IN. HEAT SINK
1 1/2 IN. HEAT SINK
A
)
(400)
(400)
2.0
2.0
) divided by the
Lineage Power
April 2008
(500)
(500)
2.5
2.5
C
) is
8-2164 (F).a
8-2165 (F).a
(600)
(600)
3.0
3.0