FW330 Lineage Power, FW330 Datasheet - Page 19

• Manufacturer Part Number: FW330
• Description: Fw330 Power Modules Dc-dc Converters 36 To 75 Vdc Input, 3.6, 3.3, 2.5, 2.0, Or 1.8 Vdc Output; 180 W To 330 W
• Manufacturer: Lineage Power

April 3, 2008
Thermal Considerations
Heat Transfer Without Heat Sinks
Figure 30. Convection Power Derating with No
Figure 31. Convection Power Derating with No
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 be attached to the module. The mounting torque
must not exceed 0.56 N-m (5 in.-lb.). For the screw
attachment from the pin side, the recommended hole
Lineage Power
9 0
8 0
7 0
6 0
5 0
4 0
3 0
2 0
1 0
9 0
8 0
7 0
6 0
5 0
4 0
3 0
2 0
1 0
0
0
0
0
10
10
Heat Sink; Airflow Along Width;
Transverse Orientation
Heat Sink; Airflow Along Length;
Longitudinal Orientation
L OCAL AMBIEN T TEMPERATURE, T
L OCAL AMBIEN T TEMPERATURE, T
20
20
40
40
36 to 75 Vdc Input, 3.6, 3.3, 2.5, 2.0, or 1.8 Vdc Output; 180 W to 330 W
50
50
60
60
0.1 m/s (NAT. CONV.)
0.1 m/s (NAT. CONV.)
3.0 m/s (600FT./MI N.)
3.0 m/s (600FT./MI N.)
2.0 m/s (400FT./MI N.)
1.0 m/s (200FT./MI N.)
3.0 m/s (600FT./MI N.)
3.0 m/s (600FT./MI N.)
2.0 m/s (400FT./MI N.)
1.0 m/s (200FT./MI N.)
(continued)
70
70
80
80
(continued)
90
90
A
A
(°C)
(°C)
100
100
8-2907 (C)
8-2908 (C)
110
110
size on the customer’s PWB around the mounting
holes is 0.130 ± 0.005 inches. If a larger hole is used,
the mounting torque from the pin side must not exceed
0.25 N-m (2.2 in.-lb.).
Figures 32 and 33 shows the power derating for a mod-
ule in natural convection with the heat sinks shown in
Figures 42 and 43. Natural convection is the heat
transfer produced when air in contact with a hot surface
is heated, causing it to rise. An open environment is
required with no external forces moving the air.
Figures 32 and 33 apply when the module is the only
source of heat present in the system, generating air-
flow of approximately 10 ft./min. to 20 ft./min. Some
systems with other heat dissipating components can
generate airflows greater than 20 ft./min.
Figure 32. Heat Sink Power Derating Curves
Figure 33. Heat Sink Power Derating Curves
80
70
60
50
40
30
20
10
80
70
60
50
40
30
20
10
0
0
0
0
10
LOCAL AMBIENT TEMPERATURE, T
10
Natural Convection, Longitudinal
Orientation
Natural Convection, Transverse
Orientation
LOCAL AMBIENT TEMPERATURE, T
20
20
40
40
50
50
1 1/2 IN. HEAT SINK
1 IN. HEA T SINK
1/2 IN. HEAT SINK
1/4 IN. HEAT SINK
NO HEAT SI NK
1 1/2 IN. HEAT SINK
1 IN. HEA T SINK
1/2 IN. HEAT SINK
1/4 IN. HEAT SINK
NO HEAT SINK
60
60
70
70
A
80
80
( ° C)
A
( ° C)
90
90
8-2608 (C)
8-2609 (C)
100
100
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