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参数资料
| 型号： | PKB4619PIPNBP |
| 厂商： | ERICSSON POWER MODULES AB |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 62.5 W DC-DC REG PWR SUPPLY MODULE |
| 封装： | 58 X 19.94 MM, 7.62 MM HEIGHT, LOW PROFILE, EIGHTH BRIK PACKAGE-8 |
| 文件页数： | 12/12页 |
| 文件大小： | 233K |
| 代理商： | PKB4619PIPNBP |
9
PKB 4000
EN/LZT 146 033 R1A Ericsson Power Modules, October 2003
Operating Information
Over Temperature Protection (OTP)
The PKB 4000 Series DC/DC converters are protected
from thermal overload by an internal over temperature
shutdown circuit. When the PCB temperature adjacent to the
primary mosfet exceeds 120 C the converter will shut down
immediately. The converter will restart when the temperature
drops below 100 C.
Input And Output Impedance
The impedance of both the power source and the load will
interact with the impedance of the DC/DC converter. It is
most important to have a low characteristic impedance, both
at the input and output, as the converters have a low energy
storage capability. The PKB 4000 Series DC/DC converters
have been designed to be completely stable without the need
for external capacitors on the input or the output circuits.
The performance in some applications can be enhanced by
addition of external capacitance as described under maximum
capacitive load. If the distribution of the input voltage source
to the converter contains signicant inductance, the addition
of a 100F capacitor across the input of the converter will help
insure stability. This capacitor is not required when powering
the DC/DC converter from a low impedance source with short,
low inductance, input power leads.
Parallel Operation
The PKB 4000 Series DC/DC converters can be paralleled for
redundancy if external o-ring diodes are used in series with the
outputs. It is not recommended to parallel the PKB 4000 Series
DC/DC converters for increased power without using external
current sharing circuits.
Maximum Capacitive Load
When powering loads with signicant dynamic current
requirements, the voltage regulation at the load can be
improved by addition of decoupling capacitance at the load.
The most affective 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 short duration high-frequency components of
dynamic load changes. In addition, higher values of electrolytic
capacitors should be used to handle the mid-frequency
components. It is equally important to use good design practise
when conguring the DC distribution system.
Low resistance and low inductance PCB layouts and cabling
should be used. Remember that when using remote sensing,
all resistance, inductance and capacitance of the distribution
system is within the feedback loop of the converter. This
can affect on the converters compensation and the resulting
stability and dynamic response performance. As a “rule of
thumb”, 100F/A of output current can be used without any
additional analysis. For example with a 25A converter, values
of decoupling capacitance up to 2500 F can be used without
regard to stability. With larger values of capacitance, the load
transient recovery time can exceed the specied value. As much
of the capacitance as possible should be outside 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, please contact your local Ericsson Power Modules
representative.
Current Limit Protection
The PKB 4000 Series DC/DC converters include current
limiting circuitry that allows them to withstand continuous
overloads or short circuit conditions on the output. The output
voltage will decrease towards zero for output currents in excess
of max output current (Iomax).
The converter will resume normal operation after removal of the
overload. The load distribution system should be designed to
carry the maximum output short circuit current specified.
Over Voltage Protection (OVP)
The PKB 4000 Series DC/DC converters have latching output
overvoltage protection. In the event of an overvoltage condition,
the converter will shut down immediately. The converter can
be restarted by cycling the input voltage or using the remote
control function.
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相关代理商/技术参数 |
参数描述 |
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| PKB4711PINB | 功能描述:DC/DC转换器 5Vdc 15A Isolated Input 36-75V 75W 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: |
| PKB4711PINBLA | 制造商:Ericsson 功能描述:DC/DC PS SGL-OUT 5V 15A 75W - Bulk 制造商:Ericsson 功能描述:DC/DC POWER MODULE |
| PKB4711PINBM | 制造商:Ericsson 功能描述:- Trays 制造商:Ericsson 功能描述:DC/DC CONVERTERS |
| PKB4711PINBMLA | 制造商:Ericsson 功能描述:DC/DC PS SGL-OUT 5V 15A 75W - Bulk |
| PKB4711PINBMLA REV.R2A | 制造商:Ericsson 功能描述:PKB 1/8TH-BRICK SERIES, ISOLATED, CONVERTER - Bulk |
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