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參數(shù)資料
| 型號： | LOK4740-2RLDF |
| 廠商： | POWER-ONE INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT 50 W AC-DC REG PWR SUPPLY MODULE |
| 封裝： | ROHS COMPLIANT |
| 文件頁數(shù)： | 8/12頁 |
| 文件大小： | 210K |
| 代理商： | LOK4740-2RLDF |
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 TA 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 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 integration into a system. The
thermal conditions are influenced by input voltage, output
current, airflow, temperature of surrounding components and
surfaces. TA max is therefore, contrary to TC max, an indicative
value only.
The relation between the maximum allowed output power
Po allowed and the temperature TA 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 TA to be higher than the
value given in the table if TC max according to the table is not
exceeded.
Caution: The installer must ensure that under all operating
conditions TC remains within the limits that are stated in the table
Temperature specifications.
Fig. 3
Maximum allowed output power versus input voltage at
TA 50°C. for LOK models.
50
75
150
125
100
175 200
300
0.5
1.0
Po allowed/Po nom
0
Vi
VAC
0.85
05154a
275
225 250
Fig. 4
Maximum allowed output power versus ambient temperature
at Vi >105 VAC for LOK models.
–10
0
30
20
10
40
50
70
0.5
1.0
Po allowed/Po nom
0
TA
°C
0.45
05155a
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 Io 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.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LOK4740-2RLDG | 制造商:Power-One 功能描述:DIN RAIL FLOAT CHARGER 50W 48V |
| LOK4740-2RLD-G | 功能描述:DIN導軌式電源 50W 48-60V Btry Chgr O-DIN-RAIL Mountable RoHS:否 制造商:Mean Well 產(chǎn)品:Linear Supplies 商用/醫(yī)用:Commercial 輸出功率額定值:960 W 輸入電壓:180 VAC to 264 VAC, 254 VDC to 370 VDC 輸出端數(shù)量:1 輸出電壓（通道 1）:48 V 輸出電流（通道 1）: 輸出電壓（通道 2）: 輸出電流（通道 2）: 輸出電壓（通道 3）: 輸出電流（通道 3）: 尺寸:150 mm L x 110 mm W |
| LOK4801-2R | 功能描述:DC/DC轉(zhuǎn)換器 DIN Rail 48W (48V) RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風格:SMD/SMT 封裝 / 箱體尺寸: |
| LOK4801-2RG | 制造商:Power-One 功能描述:DIN RAIL 48W 48V |
| LOK4801-2R-G | 功能描述:DIN導軌式電源 50W 48V O-DIN-RAIL Mountable AC-DC RoHS:否 制造商:Mean Well 產(chǎn)品:Linear Supplies 商用/醫(yī)用:Commercial 輸出功率額定值:960 W 輸入電壓:180 VAC to 264 VAC, 254 VDC to 370 VDC 輸出端數(shù)量:1 輸出電壓（通道 1）:48 V 輸出電流（通道 1）: 輸出電壓（通道 2）: 輸出電流（通道 2）: 輸出電壓（通道 3）: 輸出電流（通道 3）: 尺寸:150 mm L x 110 mm W |
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