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参数资料
| 型号： | FM1501-7RD4AHFU |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 50 W DC-DC REG PWR SUPPLY MODULE |
| 封装： | 168.50 X 111.20 MM, 38.70 MM HEIGHT, METAL, CASE M02, MODULE |
| 文件页数： | 15/24页 |
| 文件大小： | 536K |
| 代理商： | FM1501-7RD4AHFU |
Rugged Environment
DC-DC Converters <100 W
M-Family
Edition 2/96 - Melcher AG
7 - 23
MELCHER
The Power Partners.
7.1
Thermal considerations
Table 23: Temperature specifications, values given are for an air pressure of 800...1200 hPa (800...1200 mbar)
Characteristic
min
max
Unit
TA
Standard operational ambient temperature range -7, (MIL-STD-810D sections 501.2 and 502.2)
–25
71
°C
TA
Extended operational ambient temperature range -9, (MIL-STD-810D sections 501.2 and 502.2)
–40
71
TC
Standard operational case temperature range -7, overtemp. lock-out (PTC) at
TC > 95°C
–25
95
TC
Extended operational case temperature range -9, overtemp. lock-out (PTC) at
TC > 95
°C
–40
95
TS
Storage temperature range -7, (MIL-STD-810D sections 501.2 and 502.2)
–40
100
TS
Extended storage temperature range -9, (MIL-STD-810D sections 501.2 and 502.2)
–55
100
Table 24: MTBF
Values at specified
Module Types
Ground Benign
Ground Fixed
Ground Mobile
Unit
Case Temperature
40
°C40°C70°C50°C
MTBF 1
A...LM 1000 and C/D/LMZ 1000
320'000
130'000
40'000
35'000
h
A...LM 2000 and C/D/LMZ 2000
255'000
105'000
32'000
28'000
A...LM 3000 and C/D/LMZ 3000
225'000
80'000
28'000
25'000
Device hours 2
A...LM 1000 and C/D/LMZ 1000
880'000
A...LM 2000 and C/D/LMZ 2000
720'000
A...LM 3000 and C/D/LMZ 3000
740'000
1 Calculated in accordance with MIL-HDBK-217E (calculation according to edition F would show even better results)
2 Statistical values, based on an average of 4300 working hours per year and in general field use, over 3 years
Basically the available output power is limited by thermal
characteristics. Customer specific applications requiring
slightly higher output power, i.e. increased voltages or cur-
rents, are available on request. Usually the maximum ambi-
ent and case temperatures are reduced compared with
standard types. Operation at higher temperatures with
nominal output currents is also possible if forced cooling
can be provided (heat sink, fan, etc.).
Example: Sufficient forced cooling allows
TA max = 85°C. A
simple check of the case temperature
TC (TC ≤ 95°C) at full
load ensures correct operation of the system (temperature
measurement point on the case see "Mechanical Data").
In general: For an ambient temperature of 85
°C with only
convection cooling, the maximum permissible current for
each output is approx. 50% of it's nominal value for -7 or
-9 units as per figure.
0
10
20
30
40
50
60
70
80
TA min
50
60
70
80
90
100
Io nom [%]
TA [°C]
90
100
110
TC max
Io nom
each output
(convection cooling)
Io nom (forced cooling)
Fig. 24
Output derating versus ambient temperature under con-
vection and forced cooling conditions
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