FW300H1 Lineage Power, FW300H1 Datasheet - Page 14

• Manufacturer Part Number: FW300H1
• Description: CONVERTER DC/DC 24V 300W OUT
• Manufacturer: Lineage Power
• Series: FW300r
• Type: Isolated with Remote On/Offr

Specifications of FW300H1

• Output: 24V
• Number Of Outputs: 1
• Power (watts): 300W
• Mounting Type: Through Hole
• Voltage - Input: 36 ~ 75V
• Package / Case: Module
• 1st Output: 24 VDC @ 12.5A
• Size / Dimension: 4.60" L x 2.40" W x 0.53" H (116.8mm x 61mm x 13.5mm)
• Power (watts) - Rated: 300W
• Operating Temperature: -40°C ~ 100°C
• Efficiency: 89%
• Approvals: CE, CSA, UL, VDE
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• 3rd Output: -
• 2nd Output: -
• 4th Output: -

Data Sheet
September 2001
Thermal Considerations
Introduction (continued)
The temperature at this location should not exceed
100 °C. The maximum case temperature can be limited
to a lower value for extremely high reliability. The output
power of the module should not exceed the rated power
for the module as listed in the Ordering Information table.
For additional information about these modules, refer to
the Thermal Management for FC- and FW-Series 250
W—300 W Board-Mounted Power Modules Technical
Note (TN96-009EPS).
Heat Transfer Without Heat Sinks
Derating curves for forced-air cooling without a heat
sink are shown in Figures 21 and 22. These curves can
be used to determine the appropriate airflow for a given
set of operating conditions. For example, if the unit with
airflow along its length dissipates 20 W of heat, the
correct airflow in a 40 °C environment is 1.0 m/s
(200 ft./min.).
Figure 21. Convection Power Derating with No Heat
Tyco Electronics Corp.
70
60
50
40
30
20
10
0
0
0.1 m/s (20 ft./min.) NAT. CONV.
Sink; Airflow Along Width (Transverse)
10
LOCAL AMBIENT TEMPERATURE, T
20
30
40
50
60
(continued)
4.0 m/s (800 ft./min.)
3.5 m/s (700 ft./min.)
3.0 m/s (600 ft./min.)
2.5 m/s (500 ft./min.)
2.0 m/s (400 ft./min.)
1.5 m/s (300 ft./min.)
1.0 m/s (200 ft./min.)
0.5 m/s (100 ft./min.)
FW250H1 and FW300H1 Power Modules; dc-dc Converters:
70
80
36 Vdc to 75 Vdc Input, 24 Vdc Output; 250 W to 300 W
A
( C)
90
100
8-1315
Figure 22. Convection Power Derating with No Heat
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
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.-lbs.).
Thermal derating with heat sinks is expressed by using
the overall thermal resistance of the module. Total
module thermal resistance ( ca) is defined as the max-
imum case temperature rise ( T
module power dissipation (P
The location to measure case temperature (T
shown in Figure 20. Case-to-ambient thermal resis-
tance vs. airflow for various heat sink configurations is
shown in Figure 23 and Figure 24. These curves were
obtained by experimental testing of heat sinks, which
are offered in the product catalog.
70
60
50
40
30
20
10
ca
0
0
=
0.1 m/s (20 ft./min.) NAT. CONV.
Sink; Airflow Along Length
(Longitudinal)
10
LOCAL AMBIENT TEMPERATURE, T
-------------------- -
T
P
C max
20
,
D
30
=
40
----------------------- -
T
D
C
):
50
P
–
D
C, max
T
A
60
4.0 m/s (800 ft./min.)
3.5 m/s (700 ft./min.)
3.0 m/s (600 ft./min.)
2.5 m/s (500 ft./min.)
2.0 m/s (400 ft./min.)
1.5 m/s (300 ft./min.)
1.0 m/s (200 ft./min.)
0.5 m/s (100 ft./min.)
) divided by the
70
80
A
( C)
C
) is
90
100
8-1314
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