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參數(shù)資料
| 型號(hào)： | 40IMX70-05-0IG |
| 廠商： | POWER-ONE INC |
| 元件分類(lèi)： | 電源模塊 |
| 英文描述： | 1-OUTPUT 51 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | ROHS COMPLIANT PACKAGE-19 |
| 文件頁(yè)數(shù)： | 14/15頁(yè) |
| 文件大?。?/td> | 349K |
| 代理商： | 40IMX70-05-0IG |
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BCD.00002 Rev AA, 3-Feb-2010
Page 8 of 15
www.power-one.com
IMX70, IMY70 Series Data Sheet
70 Watt DC-DC Converters
1.0
0.8
0.6
0.4
0
0.2
20
40
60
80
100
°C
Io / Io nom
JM036
TA
0.5 m/s = 100 LFM
natural cooling
1 m/s = 200 LFM
Fig. 6a
Maximum allowed output power versus ambient temperature
(with no option Z).
Thermal Considerations
Table 6a and 6b specify the admissible output power of a
converter, mounted on a printed circuit board, located in free
environment, exposed to an airflow with the ambient
temperature TA. This applies to continuous operation in the
input voltage range Vi min to Vi max; see table 2, Input data. The
case temperature TC (TC Z for option Z) measured at the
measuring point of case temperature (see Mechanical Data)
will approach the indicated value TC max after the warm-up
phase.
However, the reached temperature TC depends heavily on the
conditions of operation, the distance and temperature of
surrounding components, the orientation of the converter and
the airflow, and the surfaces, thickness, and properties of the
printed circuit board.
Caution: The case temperature TC (TC Z for option Z), measured at
the temperature measuring point (see Mechanical Data) may under
no circumstances exceed the specified maximum value. The installer
must ensure that under all operating conditions TC (TC Z) remain
within the limits stated in the table Temperature specifications.
Overtemperature Protection
The converter is protected against possible overheating by
means of an internal temperature monitoring circuit. It shuts
down the converter above the internal temperature limit and
attempts to automatically restart. This feature prevents
excessive internal temperature building up, which could occur
under heavy overload conditions.
Fig. 7
Current limitation of single-output models or double-output
models with both outputs connected in parallel
Short Circuit Behavior
The current limiting circuit decreases the output voltage, when
an overcurrent occurs. It protects against a short circuit and
automatically
recovers
after
removal
of
the
overload
condition.
If
one
output
of
double-output
models
is
overloaded, the current limiting circuit decreases the output
voltage of output 1 and consequently also of the tracking
output 2.
Connection in Series
The outputs of all models may be connected in series without
any precaution.
Connection in Parallel
If single-output converters should be operated in parallel, we
recommend to order option T.
Both outputs of a double-output converter can be connected in
parallel without precaution and will share their currents evenly.
Note: If output 2 of a double-output converter is not used, connect it
parallel to output 1.
Single-output converters without option T or double-output
converters with the same nominal output voltage should only
be operated in parallel with some precautions. The output
lines to the load should have the same length and section. To
improve the current repartition, small resistors should be
present in the output lines. If ORing diodes are used, double
Schottky diodes should be chosen to keep both diodes at the
same temperature level. If single diodes are chosen, they
should be mounted on the same heat sink. If the total load
exceeds 150% of the nominal load of one converter, start-up
problems are possible.
Note: Instead connecting two 24 V models in parallel, we recommend
to connect two 12 V models in series, such avoiding any problem.
Fig. 6b
Maximum allowed output power versus ambient temperature
for converters with option Z in vertical position.
1.0
0.8
0.6
0.4
0
0.2
20
40
60
80
100
°C
Io / Io nom
JM039
TA
0.5 m/s = 100 LFM
natural cooling
1 m/s = 200 LFM
70
100
Vo [%]
t
05041b
0.3 s
overload short-circuit condition
switch-off
0
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