参数资料
型号: FC250B1
厂商: LINEAGE POWER LLC
元件分类: 电源模块
英文描述: 1-OUTPUT 250 W DC-DC REG PWR SUPPLY MODULE
封装: MODULE-14
文件页数: 6/20页
文件大小: 752K
代理商: FC250B1
14
Lineage Power
Data Sheet
April 2008
18 Vdc to 36 Vdc Input, 12 Vdc Output; 250 W
FC250B1 Power Module: dc-dc Converter;
Thermal Considerations (continued)
Heat Transfer with Heat Sinks (continued)
8-1321 (C)
Figure 21.Case-to-Ambient Thermal Resistance
Curves; Transverse Orientation
8-1320 (C)
Figure 22.Case-to-Ambient Thermal Resistance
Curves; Longitudinal Orientation
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 21 and
22 had a thermal-conductive dry pad between the case
and the heat sink to minimize contact resistance.
To choose a heat sink, determine the power dissipated
as heat by the unit for the particular application.
Figure 23 shows typical heat dissipation for a range of
output currents and three voltages for the FC250B1.
8-1662 (C)
Figure 23.FC250B1Power Dissipation vs. Output
Current at 25 °C
0.0
0.5
3.0
3.5
4.0
4.5
2.5
2.0
1.0
1 1/2 IN. HEAT SINK
1 IN. HEAT SINK
1/2 IN. HEAT SINK
1/4 IN. HEAT SINK
NO HEAT SINK
1.5
AIR VELOCITY, m/s (ft./min.)
0
0.5
(100)
1.0
(200)
1.5
(300)
2.0
(400)
2.5
(500)
3.0
(600
CASE-T
O-AMBIENT
THERMAL
RESIST
ANCE,
θ
CA
(C/W)
0
0.5
(100)
1.0
(200)
1.5
(300)
2.0
(400)
2.5
(500)
3.0
(600
0.0
0.5
3.0
3.5
4.0
4.5
2.5
2.0
1.0
1 1/2 IN. HEAT SINK
1 IN. HEAT SINK
1/2 IN. HEAT SINK
1/4 IN. HEAT SINK
NO HEAT SINK
CASE-T
O-AMBIENT
THERMAL
RESIST
ANCE,
θ
CA
(C/W)
1.5
AIR VELOCITY, m/s (ft./min.)
10
24
12
14
16
18
0
OUTPUT CURRENT, IO (A)
15
25
5
55
20
0
8
10
6
PO
WER
DISSIP
A
TION,
P
D
(W)
35
20
30
50
40
45
VI = 18 V
VI = 27 V
VI = 36 V
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