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[原创] Maxim MAX34451PMBus 16路电压/电流监视器解决方案

关键词:PMBus 网络通信 路由器 服务器 智能电网 MAX34451

时间:2019-05-14 10:21:36       来源:中电网

Maxim公司的MAX34451是监视多达16路电压或电流以及12路电源加电顺序的电源系统管理器;主要监测电源输出电压和电流以及常常检查用户编程阈值的过高和不足限值.MAX34451可快速可靠控制和故障检测提升了系统可靠性,快速最低/最高阈值偏移检测,支持多达5个温度传感器(1个内置,4个遥控)以及所有温度传感器的故障检测,并对多种参数报告峰值,最低值和平均值,可编程告警输出,I2C-/SMBus兼容串行总线,工作电压+3.0V到 +3.6V,主要用在网络交换/路由器,基站,服务器和智能电网网络系统.本文介绍了MAX34451主要优势和特性,框图和MFR_FAULT_RESPONSE运作图,工作电路图以及评估板MAX34451 EVK主要特性,电路图,材料清单和PCB设计图.

The MAX34451 is a power-supply system manager that is capable of monitoring up to 16 different voltage rails or currents and is also capable of sequencing and margining up to 12 power supplies. The system manager monitors the power-supply output voltages and currents and constantly checks them for user programmable over and under threshold limits. If a fault is detected, the device automatically shuts down the system in an orderly fashion. The device can sequence the supplies in any order at both power-up and power-down. The device has the ability to close-loop margin the power-supply output voltages up or down to a user-programmable level. The device contains an internal temperature sensor and can support up to four external remote temperature sensors. Once configured, the device can operate autonomously without any host intervention.

MAX34451主要优势和特性:

● Integration Enables Management of Multiple Power Supplies to Maximize System Performance
16 Channels of Voltage or Current Monitoring
12 Channels of Sequencing and Margining (8 PWM, 4 External Current DACs (1 x DS4424), and Sequencing
Expandable Channel Operation with Parallel Devices
Remote Ground Sensing Improves Measurement Accuracy
Programmable Up and Down Time-Based or Event-Based Sequencing
Dual Sequencing Loops
Configurable Combinatorial Logic Supporting Up to 16 GPIs and 20 GPOs
Automatic Closed-Loop Margining
No External Clocking Required
PMBus™-Compliant Command Interface
● Fast, Reliable Control and Fault Detection Improves System Reliability
Fast Minimum/Maximum Threshold Excursion Detection
Supports Up to 5 Temperature Sensors (1 Internal and 4 Remote)
Fault Detection on All Temperature Sensors
Reports Peak, Minimum, and Average Levels for a Number of Parameters
Programmable Alarm Outputs
On-Board Nonvolatile Black Box Fault Logging and Default Configuration Setting
● I2C-/SMBus-Compatible Serial Bus with Bus Time-Out Function Simplifies Additional Temperature Sensors and DACs to the MAX34451
● +3.0V to +3.6V Supply Voltage

MAX34451应用:

● Network Switches/Routers
● Base Stations
● Servers
● Smart Grid Network Systems

图1.MAX34451框图

图2.MAX34451 MFR_FAULT_RESPONSE运作图

图3.MAX34451工作电路图

评估板MAX34451 EVK

The MAX34451 evaluation kit (EV kit) provides the hardwareand software graphical-user interface (GUI) necessaryto evaluate the MAX34451 PMBus™ 16-channel V/Imonitor and 12-channel sequencer/marginer. The EVkit includes a MAX34451 installed as well as four powersupplies that can be sequenced, monitored, andmargined by the device.

评估板MAX34451 EVK包括:

● Assembled Circuit Board Including MAX34451
● Mini USB Cable

评估板MAX34451 EVK主要特性:

● Easy Evaluation of the MAX34451
● Four Power-Supply Channels
● One Current-Sense Amplifier
● EV Kit Hardware is USB Powered (USB CableIncluded)
● USB HID interface
● Windows XP®- and Windows® 7-CompatibleSoftware
● RoHS Compliant
● Proven PCB Layout
● Fully Assembled and Tested

图4.评估板MAX34451 EVK外形图

图5.评估板MAX34451 EVK电路图(1)

图6.评估板MAX34451 EVK电路图(2)

图7.评估板MAX34451 EVK电路图(3)
评估板MAX34451 EVK材料清单:



图8.评估板MAX34451 EVK PCB设计图(1):顶层

图9.评估板MAX34451 EVK PCB设计图(2):底层
详情请见:
https://datasheets.maximintegrated.com/en/ds/MAX34451.pdf
https://datasheets.maximintegrated.com/en/ds/MAX34451EVKIT.pdf
MAX34451.pdf
MAX34451EVKIT.pdf

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