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參數(shù)資料
| 型號： | LOR4740-2RLD |
| 英文描述： | DIN-Rail Mountable AC-DC (DC-DC) Converters |
| 中文描述： | 導(dǎo)軌可安裝交直流（型DC - DC）轉(zhuǎn)換器 |
| 文件頁數(shù)： | 5/12頁 |
| 文件大小： | 155K |
| 代理商： | LOR4740-2RLD |
SEP 09, 2005 revised to JUL 17, 2006
Page 5 of 12
www.power-one.com
LOS, LOR, LOK4000 Series Data Sheet
DIN-Rail Mountable AC-DC (DC-DC) Converters
Thermal Considerations
If an AC-DC converter is located in free, quasi-stationary air
(convection cooling) at the indicated maximum ambient
temperature
T
A max
(see table:
Temperature specifications
) and
is operated at its nominal input voltage and output power, the
temperature measured at the
Measuring point of case
temperature
T
C
(see
Mechanical Data)
will approach the
indicated value
T
C max
after the warm-up phase. However, the
relationship between
T
A
and
T
C
depends heavily on the
conditions of operation and integration into a system. The
thermal conditions are influenced by input voltage, output
current, airflow, temperature of surrounding components and
surfaces.
T
A
max
is therefore, contrary to
T
C max
, an indicative
value only.
The relation between the maximum allowed output power
P
o allowed
and the temperature
T
A
of the surrounding air is given
in the figure below. The rates apply if the AC-DC converter is
located in free, quasi-stationary air (convection cooling).
Note:
Sufficient forced cooling allows
T
A
to be higher than the
value given in the table if
T
C max
according to the table is not
exceeded.
Caution:
The installer must ensure that under all operating
conditions
T
C
remains within the limits that are stated in the table
Temperature specifications
.
Fig. 3
Maximum allowed output power versus input voltage at
T
A
50°C. for LOK models.
50
75
150
125
100
175 200
300
0.5
1.0
P
o allowed
/
P
o nom
0
V
i
VAC
0.85
0
275
225 250
Fig. 4
Maximum allowed output power versus ambient temperature
at V
i
>105 VAC for LOK models.
–10
0
30
20
10
40
50
70
0.5
0.45
1.0
P
o allowed
/
P
o nom
0
T
A
°C
0
60
Output Power at Low Input Voltage
The output power of LOK models must be derated at low input
voltage, see figure below.
Output Protection
Battery charger versions LOK4140-, 4240-, LOK4740-2RLD,
and the LOK4001-2RLD have a rectangular current limitation
characteristic, which limits the output current to within 100 and
150% of
I
o nom
. The other models are protected against
overload by a current limiting circuit, which shuts down the
converter in overload condition. It automatically restarts after
removal of the overload condition (hiccup mode).
All models are short-circuit and no-load proof.
Outputs Connected in Series
Two or more converters supplying the same or different output
voltages may be connected in series. The value of the
maximum output current to be taken is defined by that unit
providing the lowest current limiting value. It should be assured
that the outputs do not feed backwards into each other caused
by their different rise/fall times at switch-on/off cycles by adding
reverse polarity diodes across each output.
Parallel Operation
Only possible with battery charger versions.
The outputs of several battery charger models with equal
output voltage (e.g. several LOK4240-2RLD) may be
connected in parallel.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LOR4801-2RLD | DIN-Rail Mountable AC-DC (DC-DC) Converters |
| LOS4001-2RLD | DIN-Rail Mountable AC-DC (DC-DC) Converters |
| LOS4140-2RLD | DIN-Rail Mountable AC-DC (DC-DC) Converters |
| LOS4240-2RLD | DIN-Rail Mountable AC-DC (DC-DC) Converters |
| LOS4301-2RLD | DIN-Rail Mountable AC-DC (DC-DC) Converters |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LOR4801-2RLD | 制造商:POWER-ONE 制造商全稱:Power-One 功能描述:DIN-Rail Mountable AC-DC (DC-DC) Converters |
| LOR5.LV318-R0025-D | 制造商:RCD 制造商全稱:RCD COMPONENTS INC. 功能描述:PRECISION LOW-OHM METAL PLATE RESISTORS |
| LOR5.LV318-R0025-F | 制造商:RCD 制造商全稱:RCD COMPONENTS INC. 功能描述:PRECISION LOW-OHM METAL PLATE RESISTORS |
| LOR5.LV318-R0025-G | 制造商:RCD 制造商全稱:RCD COMPONENTS INC. 功能描述:PRECISION LOW-OHM METAL PLATE RESISTORS |
| LOR5.LV318-R0025-H | 制造商:RCD 制造商全稱:RCD COMPONENTS INC. 功能描述:PRECISION LOW-OHM METAL PLATE RESISTORS |
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