MAX5971B

单端口、40W、IEEE 802.3af/at PSE控制器,带有I²C接口

40W、I²C、单端口、IEEE 802.3af/at兼容PSE控制器,集成0.5Ω功率MOSFET和检流电阻


点击查看特定型号的库存状况。

说明

MAX5971B是一个单端口电源控制器,设计用于IEEE® 802.3af/at兼容供电设备(PSE)。器件提供用电设备(PD)侦测、分级、限流以及直流和交流负载断开检测。MAX5971B支持自动工作和软件编程,它集成了功率MOSFET和检流电阻。器件采用54V单电源供电,支持检测和分级。此外,还支持2级事件分级和最新的大功率PD的5级分级。MAX5971B能够为单个端口提供高达40W的功率(使能5级),并为传统的PD设计提供大电容检测。

器件具有四种工作模式,适用于不同系统的要求。默认条件下的自动模式允许器件以默认设置自动运行,无需软件进行任何设置。半自动模式下,在经过软件初始化后对连接到端口的器件进行自动检测和分级,但在软件发出指令之前不会给端口供电。手动模式允许软件全程控制,有助于进行系统诊断。关断模式下将终止所有端口操作,安全关闭所有端口电源。

IC通过I²C兼容的2线串口进行软件配置和编程。器件通过I²C接口随时提供端口的电流读数。全面的可编程能力提高了系统灵活性,并提供现场诊断功能,满足各种非标准系统应用。

器件提供输入欠压锁定(UVLO)、输入欠压检测、输入过压锁定、过热保护、开启过程的输出电压摆率限制和LED状态指示。MAX5971B的可编程功能包括:启动超时、过流超时以及负载断开检测超时。

器件采用节省空间的28引脚TQFN (5mm x 5mm)功率封装,工作在扩展级(-40°C至+85°C)温度范围。
MAX5971B:典型工作电路 MAX5971B:典型工作电路 放大+

关键特性

  • 符合IEEE 802.3af/at标准
  • PSE应用中,每个端口可提供高达40W功率
  • 集成功率MOSFET和检流电阻
  • 支持54V单电源工作
  • PD检测和分级
  • I²C兼容2线串口
  • 通过I²C接口随时读取端口电流的读数
  • 对5级PD提供可编程限流
  • 为早期设备提供大电容侦测
  • 支持直流和交流负载移除检测
  • 折返式限流以及占空比受控的电流限制
  • 端口状态LED指示
  • 可直接、快速地关断器件
  • 节省空间的28引脚TQFN (5mm x 5mm)功率封装

应用

  • 单端口PSE端点应用
  • 单端口PSE电源(中跨系统)
  • 交换机/路由器
Part NumberComplianceHigh Power ModeChannelsPort Current ReadoutLoad DisconnectProgram-
mability
Package/PinsOper. Temp.
(°C)
Budgetary
Price
See Notes
MAX5971B 
IEEE 802.3af
IEEE 802.3at
Yes1I2CAC/DCI2C
TQFN/28
-40 to +85$4.53 @1k
查看所有Power Sourcing Equipment (8)
Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。


MAX5971BEVKIT: MAX5971B评估板

技术资料

应用笔记 6161 PoE Power Injector

质量和环境数据

申请可靠性报告: MAX5971B 
无铅封装的锡(Sn)晶须报告
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C  

备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

质量管理体系 >
环境管理体系 >

 
Status:
Package:
Temperature:

相关资料


MAX20473
Low-Voltage Synchronous Boost Converter

  • Synchronous Boost Converter
  • 3.0V to 4.0V Operating Supply Voltage
  • True Output Shutdown
  • High Precision
    • ±1.5% Output-Voltage Accuracy
    • 93V ±2% Undervoltage Monitoring
    • 107V ±2% Overvoltage Monitoring
  • Robust for the Automotive Environment
    • Current-Mode Control, Forced-PWM, and Skip Operation
    • Overtemperature and Overcurrent Protection
    • 12-Pin (3mm × 3mm) TDFN

  • MAX17662
    3.5V to 36V, 2A, High-Efficiency, Synchronous Step-Down DC-DC Converter

    • Reduces External Components and Total Cost
    • Reduces Number of DC-DC Regulators to Stock
    • Reduces Power Dissipation

    MAX77504
    14V Input, 3A High-Efficiency Buck Converter in WLP or QFN

    • 3A Single-Channel Buck Regulator
    • 2.6V to 14V Input Voltage
    • 0.6V to 6V Output Voltage Range

    MAX20458
    36V Boost Controller with 3.5A Synchronous Buck Converter For Automotive Applications

    • Meets Stringent OEM Module Power Consumption and Performance Specifications
    • Enables Crank-Ready Designs
    • EMI Reduction Features Reduce Interference with Sensitive Radio Bands without Sacrificing Wide Input Voltage Range

    MAX20057
    36V Boost Controller with Dual 3.5A/2A Synchronous Buck Converters for Automotive Applications

    • Meets Stringent OEM Module Power Consumption and Performance Specifications
    • Enables Crank-Ready Designs
    • Integration and Thermally Enhanced Packages Save Board Space and Cost

    MAX17631
    4.5V to 36V, 1.5A, High-Efficiency, Synchronous Step-Down DC-DC Converter

    • Reduces External Components and Total Cost
    • Reduces Number of DC-DC Regulators to Stock
    • Reduces Power Dissipation

    MAX17634A
    4.5V to 36V, 4.25A, High-Efficiency, Synchronous Step-Down DC-DC Converter

    • Reduces External Components and Total Cost
    • Reduces Number of DC-DC Regulators to Stock
    • Reduces Power Dissipation

    MAX17634B
    4.5V to 36V, 4.25A, High-Efficiency, Synchronous Step-Down DC-DC Converter

    • Reduces External Components and Total Cost
    • Reduces Number of DC-DC Regulators to Stock
    • Reduces Power Dissipation

    MAX17634C
    4.5V to 36V, 4.25A, High-Efficiency, Synchronous Step-Down DC-DC Converter

    • Reduces External Components and Total Cost
    • Reduces Number of DC-DC Regulators to Stock
    • Reduces Power Dissipation

    MAX77501
    110VPK-PK High-Efficiency Piezo Haptic Actuator Boost Driver

    • 110VPK-PK Haptic Waveforms Generation
    • Optimized for up to 2µF Haptic Piezo Actuator
    • 2.8V to 5.5V Input Supply Range

    MAX20457
    36V Dual 3.5A/2A Synchronous Buck Converters for Automotive Applications

    • Meets Stringent OEM Module Power Consumption and Performance Specifications
    • Enables Crank-Ready Designs
    • EMI Reduction Features Reduce Interference with Sensitive Radio Bands without Sacrificing Wide Input-Voltage Range

    MAXM17536
    4.5V to 60V, 4A High-Efficiency, DC-DC Step-Down SiP Power Module with Integrated Inductor

    • Reduces Design Complexity, Manufacturing Risks, and Time-to-Market
    • Saves Board Space in Space-Constrained Applications
    • Offers Flexibility for Power-Design Optimization

    MAX17576
    4.5V to 60V, 4A, High-Efficiency, Synchronous Step-Down DC-DC Converter with Internal Compensation

    • Reduces External Components and Total Cost
    • Reduces Number of DC-DC Regulators to Stock
    • Reduces Power Dissipation

    MAX20412
    Automotive Low-Voltage 2-Channel Step-Down Controller

    • 2-Channel, High-Efficiency DC-DC Controller in a Small Solution Size
    • High-Precision Regulator for Applications Processors
    • Low-Noise Features Reduce EMI

    MAX20343
    Ultra-Low Quiescent Current, Low Noise 3.5W Buck-Boost Regulator

    • Extend System Run Time
    • Low, Continuous Noise Profile
    • Adaptable Load Transient Response

    MAX20004E
    36V, 220kHz to 2.2MHz, 4A/6A/8A Fully Integrated Automotive Step-Down Converters

    • Multiple Functions for Small Size
    • High Precision
    • Robust for the Automotive Environment

    MAX20006E
    36V, 220kHz to 2.2MHz, 4A/6A/8A Fully Integrated Automotive Step-Down Converters

    • Multiple Functions for Small Size
    • High Precision
    • Robust for the Automotive Environment

    MAX20008E
    36V, 220kHz to 2.2MHz, 4A/6A/8A Fully Integrated Automotive Step-Down Converters

    • Multiple Functions for Small Size
    • High Precision
    • Robust for the Automotive Environment

    MAX17630
    4.5V to 36V, 1A, High-Efficiency, Synchronous Step-Down DC-DC Converter

    • Reduces External Components and Total Cost
    • Reduces Number of DC-DC Regulators to Stock
    • Reduces Power Dissipation

    MAX20011
    Automotive Single 8A/12A Step-Down Converter with High Efficiency

    • High-Efficiency DC-DC Converter
    • Up to 12A peak output current:
    • Differential Remote Voltage Sensing

    MAX15158Z
    High-Voltage Multiphase Boost Controller

    • Wide Operating Range
    • Integration Reduces Design Footprint
    • Robust Fault Protection Improves Quality and Reliability

    MAX20079
    Automotive 36V 3.5A Buck Converter with 3.5μA IQ

    • Synchronous DC-DC Converter with Integrated FETs
    • Small Solution Size Saves Space
    • PGOOD Output and High-Voltage EN Input Simplify Power Sequencing

    MAX20026, MAX20026S
    汽车应用、四通道、低压、降压型DC-DC转换,带低噪声LDO

    • 高度集成减小方案尺寸
    • 设计性能支持汽车应用负载点调节
    • 低噪声特性改善EMI性能

    MAX20026S
    汽车应用、四通道、低压、降压型DC-DC转换,带低噪声LDO

    • 高度集成减小方案尺寸
    • 设计性能支持汽车应用负载点调节
    • 低噪声特性改善EMI性能

    MAX20801
    MPP跟踪DC-DC转换器

    • 对20-24个串联PV电池执行MPPT
    • 快速MPPT快速响应条件变化
    • 集成限压箝位输出电压

    MAX20800
    MPP跟踪DC-DC转换器

    • 对20-24个串联PV电池执行MPPT
    • 快速MPPT快速响应条件变化
    • 集成限压箝位输出电压

    MAX20059
    4.5V至76V、1A高效、同步降压型DC-DC转换器

    • 同步DC-DC转换器,集成FET
    • 设计灵活性
    • 低电平有效RESET输出和EN输入(最大26V)简化电源排序

    MAX20058
    60V、1A、汽车应用、同步降压型DC-DC转换器

    • 同步DC-DC转换器,集成FET
    • 设计灵活性
    • 低电平有效RESET输出和EN输入(最大26V)简化上电时序

    类型 编号 PDF 标题
    应用笔记 6161 PoE Power Injector
    类型 编号 标题
    评估板7337MAX5971BEVKIT MAX5971B评估板