FW250H1 Lineage Power, FW250H1 Datasheet - Page 15

• Manufacturer Part Number: FW250H1
• Description: CONVERTER DC/DC 24V 250W OUT
• Manufacturer: Lineage Power
• Series: FW250r
• Type: Isolated with Remote On/Offr

Specifications of FW250H1

• Output: 24V
• Number Of Outputs: 1
• Power (watts): 250W
• Mounting Type: Through Hole
• Voltage - Input: 36 ~ 75V
• Package / Case: Module
• 1st Output: 24 VDC @ 10.4A
• Size / Dimension: 4.60" L x 2.40" W x 0.53" H (116.8mm x 61mm x 13.5mm)
• Power (watts) - Rated: 250W
• 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: -

FW250H1 and FW300H1 Power Modules; dc-dc Converters:
36 Vdc to 75 Vdc Input, 24 Vdc Output; 250 W to 300 W
Thermal Considerations
Heat Transfer with Heat Sinks (continued)
Figure 23. Case-to-Ambient Thermal Resistance
Figure 24. Case-to-Ambient Thermal Resistance
These measured resistances are from heat transfer
from the sides and bottom of the module as well as the
top side with the attached heat sink; therefore, the
case-to-ambient thermal resistances shown are gener-
ally lower than the resistance of the heat sink by itself.
The module used to collect the data in Figures 23 and
24 had a thermal-conductive dry pad between the case
and the heat sink to minimize contact resistance.
15
15
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
0
Curves; Transverse Orientation
Curves; Longitudinal Orientation
(100)
(100)
0.5
0.5
AIR VELOCITY, m/s (ft./min.)
AIR VELOCITY, m/s (ft./min.)
(200)
(200)
1.0
1.0
(300)
(300)
1.5
1.5
(continued)
1 1/2 IN. HEAT SINK
1 IN. HEAT SINK
1/2 IN. HEAT SINK
1/4 IN. HEAT SINK
NO HEAT SINK
1 1/2 IN. HEAT SINK
1 IN. HEAT SINK
1/2 IN. HEAT SINK
1/4 IN. HEAT SINK
NO HEAT SINK
(400)
(400)
2.0
2.0
(500)
(500)
2.5
2.5
(600)
(600)
3.0
3.0
8-1321
8-1320
To choose a heat sink, determine the power dissipated
as heat by the unit for the particular application.
Figures 25 and 26 show typical heat dissipation for a
range of output currents and three voltages for the
FW250H1 and FW300H1.
Figure 25. FW250H1 Power Dissipation vs. Output
Figure 26. FW300H1 Power Dissipation vs. Output
35
30
25
20
15
10
5
0
50
45
40
35
30
25
20
15
10
0
5
0
0
Current
Current
1
V
V
V
2
I
I
I
2
= 75 V
= 55 V
= 36 V
V
V
V
I
I
I
3
OUTPUT CURRENT, I
= 75 V
= 55 V
= 36 V
4
OUTPUT CURRENT, I
4
5
6
Tyco Electronics Corp.
6
September 2001
8
7
O
(A)
O
(A)
Data Sheet
8
10
9
12
10
8-1711
8-1712