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參數(shù)資料
| 型號(hào)： | 12IMR3-1212-2 |
| 元件分類： | 電源模塊 |
| 英文描述： | 2-OUTPUT 3 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | PLASTIC, DIP-24 |
| 文件頁數(shù)： | 4/6頁 |
| 文件大?。?/td> | 166K |
| 代理商： | 12IMR3-1212-2 |
Board Mountable
DC-DC Converters
IMR 3 Series
Edition 5/5.2000
4/6
Connection in Parallel
The outputs of several units can be connected in parallel.
However, the use of a single unit with a higher power rating
is a better choice because of uneven power distribution
among the outputs connected in parallel. It is recom-
mended to select converters to be connected in parallel
with very small output voltage differences at full load (i.e.
<
±0.5%). A decoupling diode is not required but recom-
mended.
Protection Scheme
The IMR series is continuously short circuit protected by
means of input power limitation. The unit will not be dam-
aged if started up into a short circuit. After removal of the
short circuit, it will resume normal operation.
The IMR series is also no-load proof, meaning that the
regulation is still effective with no load and the output volt-
age does not rise. However, due to component tolerances,
oscillation could occur and ripple and noise can be outside
of specified values. If the converter is used in senitive elec-
tronic circuits with no-load conditions, it is recommended to
pre-load the outputs with at least 20% of the specified
nominal load.
Fig. 3
Input filter arrangement
C1
C2
L1
Vi+
Vi–
Ci
07025
Table 4: Input filter components
Input voltage
C1
C2
Type
L1
Type
Ci
Type
12, 24, 40, 48 V DC
2.2
F 1
2.2
F 1
Siemens
2.2 mH
Siemens
4.7
F
Al-Chip
100 V
B 32522
B 82722
100 V
(low ESR)
C1225-K
A2202-N1
1 Only valid for input voltages up to 60 V DC.
Electromagnetic Compatibility (EMC)
Filter recommendations for compliance with
CISPR 22/EN 55022, class B
Electromagnetic emission requirements according to EN
55022, class B can be easely achieved by adding an exter-
nal input filter consisting of three additional capacitors and
one commom mode ring core choke.
The filter components should be placed as close as possi-
ble to the input of the converter.
Table 6: MTBF
Values at specified case temperature
Ground Benign
Ground Fixed
Ground Mobile
40
°C40°C50°C
MTBF according to MIL-HDBK-217F, N2
3'984'000 h
896'100 h
343'800 h
Immunity to Environmental Conditions
Table 5: Temperature specifications, valid for air pressure of 800...1200 hPa (800...1200 mbar)
Temperature
Standard -2
Option -7
Characteristics
Conditions
min
max
min
max
Unit
TA
Ambient temperature
Ui nom
–10
50
–25
71
°C
TC
Case temperature
Io = Io nom
–10
80
–25
85
TS
Storage temperature
Non operational
–25
85
–40
100
Thermal Considerations
If a converter is operated, the relationship between the am-
bient temperature
TA and the case temperature TC depends
heavily on the conditions of operation and integration into a
system. The thermal conditions are influenced by input volt-
age, output current, airflow, temperature of surrounding
components and surfaces and the properties of the printed
circuit board. The specified maximum ambient temperature
TA max is therefore only an indicative value and under practi-
cal operating conditions, the ambient temperature
TA may
be higher or lower than this value.
Caution: The case temperature
TC measured at the
Measuring point of case temperature
TC (see: Mechani-
cal Data) may under no circumstances exceed the
specified maximum value. The installer must ensure that
under all operating conditions
TC remains within the lim-
its stated in the table:
Temperature specifications.
Connection in Series
The outputs of one or more units can be connected in se-
ries. No suppressor diodes are required. Power-One how-
ever recommends to protect each individual output with a
Zener diode or preferably a suppressor diode, to avoid re-
verse polarity that may occur if the output voltages do not
rise simultaneously.
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