LT4275

推荐新设计使用

LTPoE++ / PoE+ / PoE PD 控制器

数据手册产品选型表

产品模型: 24

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产品详情

IEEE 802.3af/at 和 LTPoE++^™ 受电设备 (PD) 控制器
LTPoE++ 支持高达 90W 的功率级别
LT4275A 支持所有下列标准：
- LTPoE++ 38.7W、52.7W、70W 和 90W
- 符合 IEEE 802.3at (25.5W) 规范
- 符合 IEEE 802.3af (高达 13W) 规范
LT4275B 符合 IEEE 802.3at/af 规范
LT4275C 符合 IEEE 802.3af 规范
100V 绝对最大输入电压
宽结温范围 (–40°C 至 125°C)
过热保护
集成型特征电阻器
外部热插拔 (Hot Swap^™) N 沟道 MOSFET 用于实现较低的功率耗散和较高的系统效率
低至 9V 的可编程辅助电源支持
可选择支持非标准的低电压 PoE
采用 10 引脚 MSOP 封装和 3mm x 3mm DFN 封装

参考资料

ADI 始终高度重视提供符合最高质量和可靠性水平的产品。我们通过将质量和可靠性检查纳入产品和工艺设计的各个范围以及制造过程来实现这一目标。出货产品的“零缺陷”始终是我们的目标。查看我们的质量和可靠性计划和认证以了解更多信息。

产品型号	引脚/封装图-中文版	文档	CAD 符号，脚注和 3D模型
LT4275AHDD#PBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT4275AHDD#TRPBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT4275AHMS#PBF	10-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT4275AHMS#TRPBF	10-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT4275AIDD#PBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT4275AIDD#TRPBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT4275AIMS#PBF	10-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT4275AIMS#TRPBF	10-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT4275BHDD#PBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT4275BHDD#TRPBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT4275BHMS#PBF	10-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT4275BHMS#TRPBF	10-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT4275BIDD#PBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT4275BIDD#TRPBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT4275BIMS#PBF	10-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT4275BIMS#TRPBF	10-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT4275CHDD#PBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT4275CHDD#TRPBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT4275CHMS#PBF	10-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT4275CHMS#TRPBF	10-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT4275CIDD#PBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT4275CIDD#TRPBF	10-Lead DFN (3mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT4275CIMS#PBF	10-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT4275CIMS#TRPBF	10-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys

产品型号	产品生命周期	PCN

2月 14, 2025 - 25_0017 Bond Wire Change from Gold to Copper
		PCN25_0017_Form Material_Report Qualification Results Summary
LT4275AHDD#PBF	量产
LT4275AHDD#TRPBF	量产
LT4275AIDD#PBF	量产
LT4275AIDD#TRPBF	量产
LT4275BHDD#PBF	量产
LT4275BHDD#TRPBF	量产
LT4275BIDD#PBF	量产
LT4275BIDD#TRPBF	量产
LT4275CHDD#PBF	量产
LT4275CHDD#TRPBF	量产
LT4275CIDD#PBF	量产
LT4275CIDD#TRPBF	量产
6月 5, 2024 - 24_0003 Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)
		PCN24_0003_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LT4275AHMS#PBF	量产
LT4275AHMS#TRPBF	量产
LT4275AIMS#PBF	量产
LT4275AIMS#TRPBF	量产
LT4275BHMS#PBF	量产
LT4275BHMS#TRPBF	量产
LT4275BIMS#PBF	量产
LT4275BIMS#TRPBF	量产
LT4275CHMS#PBF	量产
LT4275CHMS#TRPBF	量产
LT4275CIMS#PBF	量产
LT4275CIMS#TRPBF	量产
2月 4, 2020 - 20_0130 Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0130_Form Material_Report
LT4275AHMS#PBF	量产
LT4275AHMS#TRPBF	量产
LT4275AIMS#PBF	量产
LT4275AIMS#TRPBF	量产
LT4275BHMS#PBF	量产
LT4275BHMS#TRPBF	量产
LT4275BIMS#PBF	量产
LT4275BIMS#TRPBF	量产
LT4275CHMS#PBF	量产
LT4275CHMS#TRPBF	量产
LT4275CIMS#PBF	量产
LT4275CIMS#TRPBF	量产

这是最新版本的数据手册

硬件生态系统

部分模型	产品周期	描述
PoE供电设备(PSE) 2
LTC4270	推荐新设计使用	12 端口 PoE / PoE+ / LTPoE++ PSE 控制器
LTC4266A		四通道 PoE / PoE+ / LTPoE++ PSE 控制器
PoE受电设备(PD) 1
LT4276	推荐新设计使用	LTPoE++/PoE+/PoE PD 正激式 / 反激式控制器
PowerPath、理想二极管和负载开关 1
LT4321	推荐新设计使用	PoE 理想二极管桥控制器

电源监控器 1
LT2940	量产	功率和电流监视器
理想二极管电桥 1
LT4320	推荐新设计使用	理想二极管桥控制器
模拟温度传感器 1
LTC2997	量产	远程 / 内部温度传感器

部分模型	产品周期	描述
LTC2997	量产	远程 / 内部温度传感器
LT2940	量产	功率和电流监视器

工具及仿真模型

LTspice 2

LTspice中提供以下器件型号：

LT4275A

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

PoE+ with Ideal Diode Bridge to Isolated Flyback DC/DC (12V, 2A)

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特性和优点

Galvanically isolated 12V flyback DC output with up to 24 W of output power capability
No Transformer third winding or Opto-Isolator for output regulation
Supports IEEE802.3at (PoE+, Type 2) and IEEE802.3bt (PoE++, Type 3 and 4) interfacing and power supply control via a configurable jumper array
Supports a wide input DC auxiliary power of 37V to 57V

产品详情

The AD-PS3803-RD reference design is a power converter capable of harnessing any IEEE802.3at (PoE+, Type 2) compliant downstream Power-Over-Ethernet (PoE) supply to provide a galvanically isolated DC power.

At the core of this solution is the LT8306 60V No-Opto Flyback controller, stepping down the 37V to 57V PoE input voltage to a 12V, 24W DC output.

The on-board LT4275 LTPoE++/PoE+/PoE power delivery (PD) controller handles interfacing and power delivery to any PoE supply.

The LT4321 ideal diode bridge controller is used for improved end-to-end power delivery efficiency and eased thermal design by utilizing low RDS(ON) N-Channel FETs, replacing the eight-diode configuration typically found in passive PoE rectifier bridge.

The AD-PS3803-RD also has auxiliary DC power support for a wide input range of 37V to 57V.

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