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参数资料
| 型号： | AEH15G48-7 |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 37.5 W DC-DC REG PWR SUPPLY MODULE |
| 封装： | 2.400 X 2.280 INCH, 0.500 INCH HEIGHT, HALF BRICK PACKAGE-9 |
| 文件页数： | 19/35页 |
| 文件大小： | 409K |
| 代理商： | AEH15G48-7 |
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-26-
USA
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TEL:
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www.astec.com
Parallel Power Distribution
Figure 18 shows a typical parallel power distri-
bution design. Such designs, sometimes called
daisy chains, can be used for very low output
currents, but are not normally recommended.
The voltage across loads far from the source
can vary greatly depending on the IR drops
along the leads and changes in the loads clos-
er to the source. Dynamic load conditions
increase the potential problems.
Radial Power Distribution
Radial power distribution is the preferred
method of providing power to the load. Figure
19 shows how individual loads are connected
directly to the power source. This arrangement
requires additional power leads, but it avoids
the voltage variation problems associated with
the parallel power distribution technique.
Mixed Distribution
In the real world a combination of parallel and
radial power distribution is often used. Dynamic
and high current loads are connected using a
radial design, while static and low current loads
can be connected in parallel. This combined
approach minimizes the drawbacks of a parallel
design when a purely radial design is not feasi-
ble.
Redundant Operation
A common requirement in high reliability sys-
tems is to provide redundant power supplies.
The easiest way to do this is to place two con-
verters in parallel, providing fault tolerance but
not load sharing. Oring diodes should be used
to ensure that failure of one converter will not
cause failure of the second. Figure 21 shows
such an arrangement. Upon application of
power, one of the converters will provide a
slightly higher output voltage and will support
the full load demand. The second converter will
see a zero load condition and will “idle”. If the
first converter should fail, the second converter
will support the full load. When designing
redundant converter circuits, Shottky diodes
should be used to minimize the forward voltage
drop. The voltage drop across the Shottky
diodes must also be considered when deter-
mining load voltage requirements.
Load 1
Load 2
Load 3
+Vout
-Vout
RL1
RL2
RL3
RG1
RG2
RG3
RL = Lead Resistance
RG = Ground Lead Resistance
Fig.19 Radial Power Distribution
Load 1
Load 2
Load 3
+Vout
-Vout
RL1
RL2
RL3
RG1
RG2
RG3
I1 + I2 + I3
I2 + I3
I3
RL = Lead Resistance
RG = Ground Lead Resistance
Fig.18. Parallel Power Distribution
Load 1
Load 2
Load 3
+Vout
-Vout
RL1
RL2
RL3
RG1
RG2
RG3
RL = Lead Resistance
RG = Ground Lead Resistance
Load 4
RL4
RG4
Fig.20 Mixed Power Distribution
+Vout
-Vout
+Vout
-Vout
Load
Fig.21 Redundant Operation
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| AEH15G48N | 功能描述:DC/DC转换器 CONV DC-DC 50W 48VIN 2.5V NEG-EN RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸: |
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