- 您现在的位置：买卖IC网 > PDF目录69064 > PMH8918LP (ERICSSON POWER MODULES AB) 1-OUTPUT 90 W DC-DC REG PWR SUPPLY MODULE PDF资料下载
参数资料
| 型号： | PMH8918LP |
| 厂商： | ERICSSON POWER MODULES AB |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 90 W DC-DC REG PWR SUPPLY MODULE |
| 封装： | ROHS COMPLIANT, PACKAGE-10 |
| 文件页数： | 33/47页 |
| 文件大小： | 936K |
| 代理商： | PMH8918LP |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页当前第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页
Ericsson Internal
PRODUCT SPEC.
2 (5)
Prepared (also subject responsible if other)
No.
SEC/D KEVIN YAN
3/1301-BMR 645 8 Uen
Approved
Checked
Date
Rev
Reference
SEC/D Wei Zhang A
2006-2-8
A
External Capacitors
Input capacitors:
The recommended input capacitors are determined by the
560 F minimum capacitance and 800 mArms minimum
ripple current rating.
Output capacitors (optional):
The recommended output capacitance of 330 F will allow
the module to meet its transient response specification as
defined in the electrical specification.
When using one or more non-ceramic capacitors, the
calculated equivalent ESR should be no lower than 4 m
(7m using the manufacturer’s maximum ESR for a single
capacitor).
Input And Output Impedance
The impedance of both the input source and the load will
interact with the impedance of the DC/DC regulator. It is
important that the input source has low characteristic
impedance. The regulators 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 regulator will ensure stable operation.
The capacitor is not required when powering the DC/DC
regulator 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 regulator 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 regulators have an Output Voltage Adjust pin
(Vadj). This pin can be used to adjust the output voltage above
or below Output voltage initial setting.
To increase or decrease the voltage the resistor should be
connected between the Vadj pin and GND pin. The resistor
value of the Output voltage adjust function is according to
information given under the Output section for the respective
product.
Parallel Operation
Two regulators may be paralleled for redundancy if the total
power is equal or less than PO max. It is not recommended to
parallel the regulators without using external current sharing
circuits.
Remote Sense
The DC/DC regulators have remote sense that can be used to
compensate for voltage drops between the output and the
point of load. The sense traces should be located close to the
PCB ground layer to reduce noise susceptibility. The remote
sense circuitry will compensate for up to 0.3v voltage drop
between output pins and the point of load.
If the remote sense is not needed +Sense should be left
open.
Over Temperature Protection (OTP)
The PMH and PMJ family regulators are protected from
thermal overload by an internal over temperature shutdown
circuit.
When the internal temperature exceeds the OTP threshold,
the regulator will shut down. The DC/DC regulator will make
continuous attempts to start up (soft-start mode) and resume
normal operation automatically when the temperature has
dropped >10°C below the temperature threshold.
Over Current Protection (OCP)
The regulators include current limiting circuitry for protection
at continuous overload.
The output voltage will decrease towards zero for output
currents in excess of the over-current threshold. The regulator
E
PMH 8000 series
POL regulator, Input 10.8-13.2 V, Output 18 A/99 W
EN/LZT 146 324 R1B February 2006
Ericsson Power Modules AB
Technical Specication
E
PMH 8000 series
POL regulator, Input 10.8-13.2 V, Output 18 A/99 W
EN/LZT 146 324 R1B April 2006
Ericsson Power Modules AB
Technical Specication
39
相关PDF资料 |
PDF描述 |
|---|---|
| PMJ8118LP | 1-OUTPUT 143 W DC-DC REG PWR SUPPLY MODULE |
| PMJ8118LS | 1-OUTPUT 143 W DC-DC REG PWR SUPPLY MODULE |
| PMJ8118LSR | 1-OUTPUT 143 W DC-DC REG PWR SUPPLY MODULE |
| PMR5118UWP/B | DC-DC REG PWR SUPPLY MODULE |
| PMR5118UWP/C | DC-DC REG PWR SUPPLY MODULE |
相关代理商/技术参数 |
参数描述 |
|---|---|
| PMH8918LS | 功能描述:DC/DC转换器 99W 1.2-5.5V 18 12Vin 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: |
| PMH8918LSR | 功能描述:DC/DC转换器 99W 1.2-5.5V 18 12Vin 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: |
| PMH8918LSR/B | 制造商:Ericsson 功能描述: |
| PM-H922LC | 制造商:未知厂家 制造商全称:未知厂家 功能描述:0-5Vdc Current transducer |
| PMHA10049884 | 制造商:Fairchild Semiconductor Corporation 功能描述: |
发布紧急采购，3分钟左右您将得到回复。