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參數(shù)資料
| 型號(hào)： | 48IMS25-15-9 |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT 24 W DC-DC REG PWR SUPPLY MODULE |
| 文件頁(yè)數(shù)： | 7/11頁(yè) |
| 文件大?。?/td> | 225K |
| 代理商： | 48IMS25-15-9 |
Board Mountable
DC-DC Converters
IMS 25 Series
Edition 2/4.2000
5/11
Thermal Considerations
If a converter, mounted on a PCB, is located in free, quasi-
stationary air (convection cooling) at the indicated maxi-
mum ambient temperature
TA max (see table: Temperature
specifications) and is operated at its nominal input voltage
and output power, the case temperature
TC measured at the
Measuring point of case temperature TC (see: Mechanical
Data) will approach the indicated value TC max after the
warm-up phase. However, the relationship between
TA and
TC depends heavily on the conditions of operation and inte-
gration into a system. The thermal conditions are influenced
by input voltage, output current, airflow, temperature of sur-
rounding components and surfaces and the properties of
the printed circuit board.
TA max is therefore only an indica-
tive value and under practical operating conditions, the ad-
missible 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) must 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.
Short Circuit Behaviour
The current limit characteristic shuts down the converter
whenever a short circuit or an overload is applied to its out-
put. It acts self-protecting and automatically recovers after
removal of the overload condition (hiccup mode).
Overtemperature Protection
The converters are protected from possible overheating by
means of an internal non latching temperature monitoring
circuit. It shuts down the unit above the internal tempera-
ture limit and attempts to automatically restart in short peri-
ods. This feature prevents from excessive internal tempera-
ture excursion which could occur in heavy overload condi-
tions.
Typical Performance Curves
General conditions :
TA = 25°C, unless TC is specified. Shut down pin left open-
circuit. Trim input not connected.
Table 5b: Output data for dual and double output units.
Output
12 V
15 V
Characteristics
Conditions
min
typ max
min
typ max
Unit
Uo1
Output voltage
Ui nom, Io = 0.5 Io nom
11.88
12.12
14.85
15.15
V
Io nom
Output current
Ui min...Ui max
02
0
1.6
A
IoL
Current limit 1
Ui nom
32.4
DUo
Line/load regulation (combined)
Ui min...Ui max
±1
±1%
uo1
Output voltage noise 2
Io = (0.01...1) Io nom
50
70
mVpp
Co ext
Admissible capacitive load
650
430
F
uo d
Dynamic
Voltage deviation
Ui nom
±600
±750
mV
td
load
Recovery time
Io nom 1/2 Io nom
11
ms
regulation
aUo
Temperature coefficient
Ui nom, Io nom
±0.02
%/K
DUo/DTC
TC min...TC max
1 The current limit is primary side controlled.
2 Using a probe according to EN 61204.
Fig. 4
Overload switch off (hiccup mode), typical values.
Fig. 6
Efficiency versus input voltage and load. Typical values.
Fig. 5
Uo versus Io (typ) of units with Uo = 5.1 V.
5.5
5.0
4.5
4.0
3.5
3.0
01
2
34
5
6
7
89
10
Io [A]
Uo [V]
05160
100
Uo [%]
t [ms]
05162
100
10
0
50
60
70
80
90
100
h [%]
05161
25
50
75
100
Po1
Po nom
[%]
Ui nom
Ui max
Ui min
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