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参数资料
| 型号： | 48CPS3-0505-T |
| 元件分类： | 电源模块 |
| 英文描述： | 2-OUTPUT 3 W DC-DC REG PWR SUPPLY MODULE |
| 封装： | PLASTIC, DIP-24 |
| 文件页数： | 3/7页 |
| 文件大小： | 162K |
| 代理商： | 48CPS3-0505-T |
3 Watt-Family
DC-DC Converters <40 W
Rugged Environment
6 - 12
Edition 2/96 - Melcher AG
MELCHER
The Power Partners.
6.1
Safety Instructions
If the output circuit of a DC-DC converter is operator-acces-
sible according to the IEC 950 related safety standards, it
shall be an SELV circuit (Safety Extra Low Voltage circuit,
i.e. a circuit, separated from mains by at least basic insula-
tion, that is so designed and protected that under normal
and single fault conditions, the voltage between any two
conductors and between any conductor and earth does not
exceed DC 60 V).
In the following section an interpretation is provided of the
IEC 950 safety standard with respect to the safety status of
the output circuit. However, it is the sole responsibility of the
installer or user to assure the compliance with the relevant
and applicable safety standards.
If the following table is observed, the output of any DC-DC
converter is considered to be an SELV.
Table 2: Insulation concept for SELV circuits
Nominal
Minimum required grade
Maximum
Minimum required
Minimum required grade of
Resulting safety
mains
of isolation, to be
output
safety status of the
isolation between the input
status of the
supply
provided by the AC-DC
voltage
front end output circuit
and the output of the DC-DC
DC-DC converter
voltage
front end, including mains from the
converter, provided by
output circuit
(AC)
supplied battery charger
front end
the converter
≤250 V
Basic
≤60 V
Earthed SELV circuit 1
Operational
SELV circuit 2
≤ 72 V
Unearthed hazardous
Operational
Earthed SELV
voltage secondary circuit 3
circuit 1 2
Double or reinforced
≤60 V
SELV circuit
Operational
SELV circuit 2
≤ 72 V
Double or reinforced insu-
Operational
lated unearthed hazardous
voltage secondary circuit,
supplying an SELV circuit 4
1 The earth connection has to be provided by the installer according to the relevant safety standard, e.g. IEC 950.
2 The output has to be protected against overvoltages higher than 60 V by external means, e.g. an overvoltage suppressor diode.
3 Has to be insulated from earth by at least basic insulation according to the relevant safety standard, based on the maximum input
voltage of the DC-DC converter.
4 Has to be insulated from earth by double or reinforced insulation according to the relevant safety standard, based on the maximum in-
put voltage of the DC-DC converter.
Immunity to Environmental Conditions
Thermal Considerations
Table 3: Temp. specification values given are valid for air pressures in the range 800...1200 hPa (800...1200 mbar)
Characteristics
Conditions
Standard -T
Option -S
Unit
min
max
min
max
TA
Ambient temperature
Ui min...Ui max
–25
71
–40
85
°C
TC
Case temperature
Io = 0...Io nom
–25
95
–40
105
TS
Storage temperature
not operational
–55
105
–55
105
The case temperature
TC should not exceed the maximum value. In applications with limited air circulation, additional
measures should be taken (either larger spacing or a fan) to avoid case temperatures higher than
TC max!
Table 4: MTBF
Values at specified
Modules Types
Ground Benign
Ground Fixed
Ground Mobile
Unit
Case Temperature
40
°C40°C70°C40°C70 °C
MTBF according to
Group 01
2'900'000
1'400'000 310'000
430'000
150'000
h
MIL-HDBK-217F
Group 02/03
2'300'000
1'000'000 270'000
310'000
110'000
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