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参数资料
| 型号： | 70IMX4-15-8Z |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 4.2 W DC-DC REG PWR SUPPLY MODULE |
| 封装： | DIP-24 |
| 文件页数： | 12/14页 |
| 文件大小： | 251K |
| 代理商： | 70IMX4-15-8Z |
Board Mountable
DC-DC Converters
IMX 4 Series
Edition 6/4.2000
7/14
Output overvoltage protection
The outputs of the IMX 4 converters are protected against
overvoltages by Zener diodes. In the event of an overvolt-
age on the output, the unit will shut-down and attempt to
restart automatically. The main purpose of this feature is to
protect against possible overvoltages which could occur
due to a failure in the feedback control circuit. The units are
not designed to withstand external overvoltages applied to
the outputs.
Connection in series
The outputs of single or dual output units can be connected
in series without any precautions, taking into consideration
that the highest output voltage should remain below 60 V for
SELV operation.
Connection in parallel
The outputs of several units with equal nominal output volt-
age can be connected in parallel. Approximate current
sharing between 2 or several units is ensured by their load
dependent output characteristic.
Fig. 12
Uo versus Io (typ) of single output units (example for
20/40 IMX 4-05)
Fig. 13
Uo versus Io (typ) of dual output units (
±15 V), with 30 V
load connected to Vo+ and Vo–.
5.25
5.0
4.75
4.5
4.25
4.0
00.1
0.2 0.3 0.4
0.5
0.6 0.7
0.8
0.9 1.0 I
o [A]
Uo [V]
05056
28.5
29
29.5
30
30.5
31
31.5
Uo1 + Uo2 [V]
20
40
60
80
100
120
140
Io [mA]
0
05057
14
14.5
15
15.5
16
16.5
Uo1 [V]
20
40
60
80
100
120
140
Io1 [mA]
0
Io2 = 140 mA
Io2 = 14 mA
05058
Uo1, Uo2 [V]
Io1
Io1 no
05059
12.8
12.4
12
11.6
11.2
030
60
90
120
150
[%]
Uo2
Uo1
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: Me-
chanical Data) will approach the indicated value TC max af-
ter the warm-up phase. However, the relationship between
TA and TC depends heavily on the conditions of operation
and integration into a system. The thermal conditions are
influenced by input voltage, output current, airflow, tem-
perature of surrounding components and surfaces and the
properties of the printed circuit board.
TA max is therefore
only an indicative value and under practical operating con-
ditions, 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 speci-
fied maximum value. The installer must ensure that un-
der all operating conditions
TC remains within the limits
stated in the table:
Temperature specifications.
Short Circuit Behaviour
The current limit characteristic shuts down the converter
whenever a short circuit is applied to its output. It acts self-
protecting and automatically recovers after removal of the
overload condition.
Typical Performance Curves
Fig. 14
Cross load regulation of dual output units. Uo1 versus
Io1 (typ) for various Io2 (40 IMX 4-1515).
Fig. 15
Flexible load distribution on dual outputs (2
× 12 V) with
load variation from 0...150% of Po1 nom on output 1.
Output 2 loaded with 25% of Po2 nom.
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