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参数资料
| 型号： | PKD4218HESPBI |
| 厂商： | ERICSSON POWER MODULES AB |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 21 W DC-DC REG PWR SUPPLY MODULE |
| 封装： | SMD-24 |
| 文件页数： | 7/24页 |
| 文件大小： | 811K |
| 代理商： | PKD4218HESPBI |
Ericsson Internal
PRODUCT SPECIFICATION
2 (6)
Prepared (also subject responsible if other)
No.
ESKEVIN
3/1301-BMR628 Uen
Approved
Checked
Date
Rev
Reference
SEC/D (Julia You)
EYINGJI
2008-7-9
B
Operating information
Input Voltage
The input voltage range 36 to 75 Vdc meets the requirements
of the European Telecom Standard ETS 300 132-2 for normal
input voltage range in —48 and —60 Vdc systems, -40.5 to -
57.0 V and —50.0 to -72 V respectively.
At input voltages exceeding 75 V, the power loss will be
higher than at normal input voltage and T
ref must be limited to
absolute max +110°C. The absolute maximum continuous
input voltage is 80 Vdc.
Turn-off Input Voltage
The DC/DC converters monitor the input voltage and will turn
on and turn off at predetermined levels.
The minimum hysteresis between turn on and turn off input
voltage is 2V.
Remote Control (RC)
The products are fitted with a
remote control function referenced
to the primary negative input
connection (- In), with negative and
positive logic options available.
The RC function allows the
converter to be turned on/off by an
external device like a
semiconductor or mechanical
switch.
The maximum required sink current is 1 mA. When the RC pin
is left open, the voltage generated on the RC pin is
3.5 — 6.0 V.
The default option is “positive logic” remote control, which
only requires that RC logic (pin 6) is left open. The converter
will turn on when the input voltage is applied with the RC pin
open. Turn off is achieved by connecting the RC pin to the -
In. To ensure safe turn off the voltage difference between RC
pin and the - In pin shall be less than 1V. The converter will
restart automatically when this connection is opened.
The second option is “negative logic” remote control, which
requires that RC logic (pin 6) is connected to —In (pin 3). The
converter will be off until the RC pin is connected to the — In.
To turn on the converter the voltage between RC pin and — In
should be less than 1 V. To turn off the converter the RC pin
should be left open, or connected to a voltage higher than 4V
referenced to — In. In situations were it is desired to have the
converter to power up automatically without the need for
control signals or a switch, the RC pin can be wired directly to
— In.
Input and Output Impedance
The impedance of both the input source and the load will
interact with the impedance of the DC/DC converter. It is
important that the input source has low characteristic
impedance. The converters are designed for stable operation
without external capacitors connected to the input or output.
The performance in some applications can be enhanced by
addition of external capacitance as described under External
Decoupling Capacitors. If the input voltage source contains
significant inductance, the addition of a 100 F capacitor
across the input of the converter will ensure stable operation.
The capacitor is not required when powering the DC/DC
converter from an input source with an inductance below
10 H.
External Decoupling Capacitors
When powering loads with significant dynamic current
requirements, the voltage regulation at the point of load can
be improved by addition of decoupling capacitors at the load.
The most effective technique is to locate low ESR ceramic
and electrolytic capacitors as close to the load as possible,
using several parallel capacitors to lower the effective ESR.
The ceramic capacitors will handle high-frequency dynamic
load changes while the electrolytic capacitors are used to
handle low frequency dynamic load changes. Ceramic
capacitors will also reduce any high frequency noise at the
load.
It is equally important to use low resistance and low
inductance PCB layouts and cabling.
External decoupling capacitors will become part of the
control loop of the DC/DC converter and may affect the
stability margins. As a “rule of thumb”, 100 F/A of output
current can be added without any additional analysis. The
ESR of the capacitors is a very important parameter. Power
Modules guarantee stable operation with a verified ESR value
of >10 m across the output connections.
For further information please contact your local Ericsson
Power Modules representative.
Output Voltage Adjust (Vadj)
The DC/DC converters have an Output Voltage Adjust pin
(Vadj). This pin can be used to adjust the output voltage above
or below Output voltage initial setting.
At increased output voltages the maximum power rating of
the converter remains the same, and the max output current
must be decreased correspondingly.
To increase the voltage the resistor should be connected
between the Vadj pin and -Sense pin. The resistor value of the
Output voltage adjust function is according to information
given under the Output section for the respective product.
To decrease the output voltage, the resistor should be
connected between the Vadj pin and +Sense pin.
Increase
Decrease
E
PKD 4000E SI series
DC/DC converters, Input 36-75 V, Output up to 20 A/50 W
EN/LZT 146 375 R2B July 2008
Ericsson Power Modules AB
15
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PKD4218LASI | 制造商:Ericsson 功能描述:DC/DC PS SGL-OUT 1.2V 20A 24W - Bulk |
| PKD4218LESI | 功能描述:DC/DC转换器 1.2 Vdc 20A Iso Input 36-75V 24W 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: |
| PKD4218SI | 制造商:Ericsson 功能描述:DC/DC PS SGL-OUT 1.8V 14A 25.2W - Bulk |
| PKD4218SIOA | 制造商:Ericsson 功能描述:DC/DC PS SGL-OUT 1.5V 14A 21W - Bulk |
| PKD4311SI | 制造商:Ericsson 功能描述:DC/DC PS SGL-OUT 5V 6A 30W - Bulk |
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