LTC4274A

量产

单通道 PoE / PoE+ / LTPoE++ PSE 控制器

数据手册 产品选型表
产品技术资料帮助

ADI公司所提供的资料均视为准确、可靠。但本公司不为用户在应用过程中侵犯任何专利权或第三方权利承担任何责任。技术指标的修改不再另行通知。本公司既没有含蓄的允许，也不允许借用ADI公司的专利或专利权的名义。本文出现的商标和注册商标所有权分别属于相应的公司。
Viewing:

概述

  • 符合 IEEE 802.3at Type 1 和 Type 2 标准
  • 低功耗 
    • 每个通道具有 0.25Ω 的检测电阻 
  • 非常高可靠性的 4 点 PD 检测 
    • 两点施加电压 
    • 两点施加电流
  • 高电容老式设备检测
  • 1MHz I2C 兼容型串行控制接口
  • 中跨超时定时器
  • 支持两对和四对输出功率
  • 可提供多种功率级 
    • LTC4274A-1：LTPoE++™38.7W 
    • LTC4274A-2：LTPoE++ 52.7W 
    • LTC4274A-3：LTPoE++ 70W 
    • LTC4274A-4：LTPoE++ 90W 
    • LTC4274C：PoE 13W
  • 采用 38 引脚 5mm x 7mm QFN 封装

LTC®4274A 是一款单通道供电设备 (PSE) 控制器，能向一个兼容的 LTPoE++ 受电设备 (PD) 输送高达 90W 的 LTPoE++ 功率。一种专有的检测 / 分级方案实现了 LTPoE++ PSE 与 LTPoE++ PD 之间的相互识别，同时保持了与现有的 Type 1 (13W) 和 Type 2 (25.5W) PD 的兼容性及互操作性。LTC4274A 的特性集是颇受欢迎的 LTC4274 之扩展集。这些 PSE 控制器具有低 RON 外部 MOSFET 和 0.25Ω 的检测电阻器，这些对于在 LTPoE++ 电流水平下保持尽可能低的热耗散特别重要。

LTC4274C 面向用于给 Type 1 (高达 13W) PD 供电的全自动 PSE 系统。

高级电源管理功能包括：一个 14 位电流监视 ADC、DAC 可编程电流限值、以及通用的快速端口停机。PD 发现采用了一种专有的双模式 4 点检测机制，从而可确保针对 PD 误检测的超卓免疫力。LTC4274A / LTC4274C 包括一个可在高达 1MHz 频率下运作的 I2C 串行接口。

LTC4274A / LTC4274C 可提供多种功率级，允许输送 13W、25.5W、38.7W、52.7W、70W 和 90W 的 PD 功率。这些控制器采用 38 引脚 5mm x 7mm QFN 封装。


Applications

  • LTPoE++ PSE 开关 / 路由器
  • LTPoE++ PSE 中跨
  • IEEE 802.3at Type 1 PSE 开关 / 路由器
  • IEEE 802.3at Type 1 PSE 中跨
LTC4274A
单通道 PoE / PoE+ / LTPoE++ PSE 控制器
Complete Single-Port Ethernet High Power Source Product Package 1
添加至 myAnalog

将产品添加到myAnalog 的现有项目或新项目中（接收通知）。

创建新项目
提问

参考资料

数据手册 1

用户手册 1

了解更多
添加至 myAnalog

Add media to the Resources section of myAnalog, to an existing project or to a new project.

创建新项目

软件资源

Evaluation Software 1

Software Interface Data Sheet and Software

The software interface data sheet for this PSE may be requested from the Software Request Form (SRF). This data sheet describes the I2C interface and programming details for the respective PSE controller.

Reference software for LTPoE++ Semi-auto mode operation is available for the LTC4266A and may be applied to the LTC4274A; this software may be requested from the Software Request Form.

硬件生态系统

部分模型 产品周期 描述
接口收发器和隔离器 1
LTC4310
量产 可热插拔的 I2C 隔离器
以太网供电(PoE)接口控制器 1
LT4275
量产 LTPoE++ / PoE+ / PoE PD 控制器
Modal heading
添加至 myAnalog

将产品添加到myAnalog 的现有项目或新项目中（接收通知）。

创建新项目

工具及仿真模型

LTspice

LTspice中提供以下器件型号：

  • LTC4274
LTspice

LTspice®是一款强大高效的免费仿真软件、原理图采集和波形观测器，为改善模拟电路的仿真提供增强功能和模型。

评估套件

eval board
schematic 1
schematic 2
schematic 3
schematic 4
schematic 5
DC1814A-D

LTC4274A-4 Demo Board | LTPoE++ (90W) PSE

立即购买 更多内容

产品详情

Demonstration circuit 1814A features the LTC4274A, single port power sourcing equipment (PSE) controller, capable of delivering up to 90W of LTPoE++™ power to a compatible LTPoE++ powered device (PD). A proprietary detection/classification scheme allows mutual identification between an LTPoE++ PSE and LTPoE++ PD while remaining compatible and interoperable with existing Type 1 (13W) and Type 2 (25.5W) PDs. The LTC4274A feature set is a superset of the popular LTC4274. These PSE controllers utilize low RON external MOSFETs and 0.25Ω sense resistors which are especially important at the LTPoE++ current levels to maintain the lowest possible heat dissipation.

eval board
schematic 6
DC1814A-A

LTC4274A-1 Demo Board | LTPoE++ (38.7W) PSE

立即购买 更多内容

产品详情

Demonstration circuit 1814A features the LTC4274A, single port power sourcing equipment (PSE) controller, capable of delivering up to 90W of LTPoE++™ power to a compatible LTPoE++ powered device (PD). A proprietary detection/classification scheme allows mutual identification between an LTPoE++ PSE and LTPoE++ PD while remaining compatible and interoperable with existing Type 1 (13W) and Type 2 (25.5W) PDs. The LTC4274A feature set is a superset of the popular LTC4274. These PSE controllers utilize low RON external MOSFETs and 0.25Ω sense resistors which are especially important at the LTPoE++ current levels to maintain the lowest possible heat dissipation.

eval board
schematic 7
DC1814A-C

LTC4274A-3 Demo Board | LTPoE++ (70W) PSE

立即购买 更多内容

产品详情

Demonstration circuit 1814A features the LTC4274A, single port power sourcing equipment (PSE) controller, capable of delivering up to 90W of LTPoE++™ power to a compatible LTPoE++ powered device (PD). A proprietary detection/classification scheme allows mutual identification between an LTPoE++ PSE and LTPoE++ PD while remaining compatible and interoperable with existing Type 1 (13W) and Type 2 (25.5W) PDs. The LTC4274A feature set is a superset of the popular LTC4274. These PSE controllers utilize low RON external MOSFETs and 0.25Ω sense resistors which are especially important at the LTPoE++ current levels to maintain the lowest possible heat dissipation.

eval board
schematic 8
DC1814A-B

LTC4274A-2 Demo Board | LTPoE++ (52.7W) PSE

立即购买 更多内容

产品详情

Demonstration circuit 1814A features the LTC4274A, single port power sourcing equipment (PSE) controller, capable of delivering up to 90W of LTPoE++™ power to a compatible LTPoE++ powered device (PD). A proprietary detection/classification scheme allows mutual identification between an LTPoE++ PSE and LTPoE++ PD while remaining compatible and interoperable with existing Type 1 (13W) and Type 2 (25.5W) PDs. The LTC4274A feature set is a superset of the popular LTC4274. These PSE controllers utilize low RON external MOSFETs and 0.25Ω sense resistors which are especially important at the LTPoE++ current levels to maintain the lowest possible heat dissipation.
DC1814A-D
LTC4274A-4 Demo Board | LTPoE++ (90W) PSE
DC1814A-D Demo Board DC1814A-D Demo Board DC1814A-D Demo Board DC1814A-D Demo Board DC1814A - Schematic
DC1814A-A
LTC4274A-1 Demo Board | LTPoE++ (38.7W) PSE
DC1814A - Schematic
DC1814A-C
LTC4274A-3 Demo Board | LTPoE++ (70W) PSE
DC1814A - Schematic
DC1814A-B
LTC4274A-2 Demo Board | LTPoE++ (52.7W) PSE
DC1814A - Schematic
DC590B
用于凌力尔特 QuikEval 演示板的 USB 串行控制器
DC590B - Schematic

最新评论

需要发起讨论吗？ 没有关于 LTC4274A_C的相关讨论？是否需要发起讨论？

在EngineerZone®上发起讨论

近期浏览