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参数资料
| 型号： | PKB4204BSI |
| 厂商： | ERICSSON POWER MODULES AB |
| 元件分类： | 电源模块 |
| 英文描述： | 2-OUTPUT 194 W DC-DC REG PWR SUPPLY MODULE |
| 封装： | ROHS COMPLIANT, PACKAGE-5 |
| 文件页数： | 4/20页 |
| 文件大小： | 1256K |
| 代理商： | PKB4204BSI |
Ericsson Internal
PRODUCT SPECIFICATION
2 (5)
Prepared (also subject responsible if other)
No.
EAB/FJB/GKJ Tord Johansson
3/1301-BMR 658 Uen
Approved
Checked
Date
Rev
Reference
EAB/FJB/GKG (Magnus Broman)
(MICMROS) 2008-06-03
A
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 Tref must be limited to
absolute max 125 °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 on and off input
voltage is 1.0 V.
Remote Control (RC)
The products are fitted with a
remote control function referenced
to the primary negative input
connection (- In), with positive logic
option available. The RC function
allows the product to be turned
on/off by an external device like a
semiconductor or mechanical
switch. The RC pin has an internal
pull up resistor to + In.
The maximum required sink current is less than 1 mA. When
the RC pin is left open, the voltage generated on the RC pin is
5-10 V. The second option is “positive logic” remote control,
which can be ordered by adding the suffix “P” to the end of
the part number. The DC/DC 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 1 V. The DC/DC converter will restart
automatically when this connection is opened.
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. Minimum recommended external input
capacitance is 220 F. The performance in some applications
can be enhanced by addition of external capacitance as
described under External Decoupling Capacitors.
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.
For semi regulated DC/DC converters, such as PKB-B
intermediate bus converters, there is no limit on the value of
output capacitance that may be used. The user should be
aware, however, that large values of capacitance will affect
the ramp-up time of the DC/DC converter output voltage
during start-up.
For further information please contact your local Ericsson
Power Modules representative.
Parallel Operation
The converters can be paralleled for redundancy if external o-
ring diodes are used in series with the outputs.
Over Temperature Protection (OTP)
The DC/DC converters are protected from thermal overload
by an internal over temperature shutdown circuit.
When Tref as defined in thermal consideration section
exceeds 125°C the DC/DC converter will shut down. The
DC/DC converter will make continuous attempts to start up
(non-latching mode) and resume normal operation
automatically when the temperature has dropped below the
temperature threshold.
Over Voltage Protection (OVP)
The DC/DC converters have an output over voltage protection
that normally will clamp the output voltage to the OVP
threshold level. If the output voltage should increase to the
OVP threshold level very fast then the DC/DC converter can
shut down and make attempts to start up (non-latching
mode). After removal of the over voltage condition the DC/DC
converter will resume to normal operation automatically.
Over Current Protection (OCP)
The DC/DC converters include current limiting circuitry for
protection at continuous overload.
The output voltage will decrease towards zero for output
currents in excess of max output current (max IO). The DC/DC
converter will resume normal operation after removal of the
overload. The load distribution should be designed for the
maximum output short circuit current specified.
E
PKB 4000B PI
Intermediate Bus Converters, Input 36-75 V, 40 A / 240 W
EN/LZT 146 384 R2A Dec 2008
Ericsson Power Modules AB
Technical Specification
12
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相关代理商/技术参数 |
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| PKB4204PI | 功能描述:DC/DC转换器 240W 12V 20A 40-75Vin 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: |
| PKB4204PIHS | 制造商:Ericsson 功能描述:- Trays |
| PKB4204PI-HS | 功能描述:DC/DC转换器 240W 12V 20A 40-75Vin BASEPLATE 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: |
| PKB4204PIHSLA | 制造商:Ericsson 功能描述:- Trays |
| PKB4204PIHSLB | 制造商:Ericsson 功能描述:- Trays |
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