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参数资料
| 型号： | PKJ4510PIP |
| 厂商： | ERICSSON POWER MODULES AB |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 50 W DC-DC REG PWR SUPPLY MODULE |
| 文件页数： | 11/20页 |
| 文件大小： | 617K |
| 代理商： | PKJ4510PIP |
Paralleling for Redundancy
The figure below shows how n + 1 redundancy can be achieved.
The diodes on the power module outputs allow a failed module
to remove itself from the shared group without pulling down the com-
mon output bus. This configuration can be extended to
additional numbers of power modules and they can also be
controlled individually or in groups by means of signals to the
primary RC inputs.
Output Ripple & Noise (VO
ac
)
Output ripple is measured as the peak to peak voltage from 0 to
20MHz which includes the noise voltage and fundamental.
Over Temperature Protection
The PKJ DC/DC power modules are protected from thermal overload
by an internal over temperature shutdown circuit. When the case
temperature exceeds +110°C, the power module will automatically
shut down (latching). To restart the module the input voltage must
be cycled. The internal temperature is a few degrees higher than the
case (baseplate) temperature.
Input and Output Impedance
The impedance of both the power source and the load will interact
with the impedence of the DC/DC power module. It is most important
to have the ratio between L and C as low as possible, i.e. a low charac-
teristic impedance, both at the input and output, as the power mod-
ules have a low energy storage capability. The PKJ series of DC/DC
power modules has been designed to be completely stable without the
need for external capacitors on the input or output when configured
with low inductance input and output circuits. The performance in
some applications can be enhanced by the addition of external capaci-
tance as described below. If the distribution of the input voltage source
to the power module contains significant inductance, the addition of a
220-470 F capacitor across the input of the power module will help
insure stability. Tantalum capacitors are not recommended due to their
low ESR-value. This capacitor is not required when powering the
module from a low impedance source with short, low inductance,
input power leads.
Output Capacitance
When powering loads with significant dynamic current requirements,
the voltage regulation at the load can be improved by the addition of
decoupling capacitance at the load. The most effective technique is to
locate low ESR ceramic capacitors as close to the load as possible, using
several capacitors to lower the effective ESR. These ceramic capacitors
will handle the short duration high frequency components of the
dynamic current requirement. In addition, higher values of electrolytic
capacitors should be used to handle the mid frequency components. It
is equally important to use good design practices when configuring the
DC distribution system.
19
Data Sheet AE/LZT 137 57 R1 Ericsson Components AB, August 1999
Low resistance and low inductance PCB (printed circuit board) layouts
and cabling should be used. Remember that when using remote sens-
ing, all the resistance, inductance and capacitance of the distribution
system is within the feedback loop of the power module. This can have
an effect on the modules compensation and the resulting stability and
dynamic response performance.
As a rule of thumb, 100 F/A of output current can be used without
any additional analysis. For example, with a 30A (max PO 150W)
power module, values of decoupling capacitance up to 3000 F can be
used without regard to stability. With larger values of capacitance, the
load transient recovery time can exceed the specified value. As much of
the capacitance as possible should be outside of the remote sensing
loop and close to the load.The absolute maximum value of output
capacitance is 10,000 F. For values larger than this contact your local
Ericsson representative.
Quality
Reliability
The calculated MTBF of the PKJ module family is 3 million
hours using Bellcore TR-332 methodology. The calculation is valid
for an ambient temperature of 40°C and an output load 80% of
rated maximum.
Quality Statement
The power modules are designed and manufactured in an industrial
environment where quality systems and methods like ISO 9000, 6
σ,
and SPC, are intensively in use to boost the continuous improvements
strategy. Infant mortality or early failures in the products are screened
out and they are subjected to an ATE-based final test.
Conservative design rules, design reviews and product qualifications,
plus the high competence of an engaged work force, contribute to the
high quality of our products.
Warranty
Ericsson Components warrants to the original purchaser or end user
that the products conform to this Data Sheet and are free from material
and workmanship defects for a period of five (5) years from the date of
manufacture, if the product is used within specified conditions and not
opened.
In case the product is discontinued, claims will be accepted up to three
(3) years from the date of the discontinuation. For additional details on
this limited warranty we refer to Ericsson Components AB’s “General
Terms and Conditions of Sales”, EKA 950701, or individual contract
documents.
Limitation of Liability
Ericsson Components does not make any other warranties, expressed
or implied including any warranty of merchantability or fitness for a
particular purpose (including, but not limited to use in life support
applications, where malfunctions of product can cause injury to a
person’s health or life).
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| PKJ4519PIP | 制造商:Ericsson 功能描述:DC/DC PS SGL-OUT 2.5V 20A 50W - Bulk |
| PKJ4519PIT | 功能描述:DC/DC转换器 2.5 Vdc 20A Iso Input 36-75V 50W 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: |
| PKJ4618GEPI | 功能描述:DC/DC转换器 1.8 Vdc 36A Iso Input 48V 65W 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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