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LTC4257IDD#TRPBF

厂商:
Linear
类别:
PoE受电设备 (PD)
包装:
-
封装:
DFN
无铅情况/ROHS:
无铅
描述:
IEEE 802.3af PD Power over Ethern...

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  • 参数
  • 描述
  • 文档
参数 数值
Channels (#) 1
PoE Type 1
Topology -
Max Power (W) 13
IEEE-Compliant Classification One Event
IEEE-Compliant Detection Yes (Internal 25k resistor)
Extended Temp C, I
Packages SO-8, DFN-8
Description IEEE 802.3af PD
IEEE-Compliant Disconnection N/A
PSE/PD PD
Featured no
Date Added 1984-01-01
Price 1k * $1.70 (LTC4257CDD)
New no

特点
Complete Power Interface Port for IEEE 802.3af ? Powered Devices (PDs)
Onboard 100V, 400mA Power MOSFET
Precision Input Current Limit
Onboard 25k Signature Resistor
Programmable Classification Current (Class 0-4)
Undervoltage Lockout
Smart Thermal Protection
Power Good Signal
Available in 8-Pin SO and Low Profile (3mm x 3mm)? DFN Packages

典型应用

典型应用

描述
The LTC?4257 provides complete signature and power interface functions for a device operating in an IEEE 802.3af Power over Ethernet (PoE) system. The LTC4257 simplifies Powered Device (PD) design by incorporating the 25k signature resistor, the classification current source, input current limit with thermal foldback, undervoltage lockout and power good signalling, all in a single 8-pin package. By incorporating a high voltage power MOSFET onboard, the LTC4257 provides the system designer with reduced cost while also saving board space.
The LTC4257 can interface directly with a variety of Linear Technology DC/DC converter products to provide a cost effective power solution for IP phones, wireless access points and other PDs. Linear Technology also provides solutions for Power Sourcing Equipment (PSE) applications with quad network power controllers.
The LTC4257 is available in the 8-pin SO and low profile (3mm x 3mm) DFN packages.

产品新闻发布 (中文)
文档名称 文档类型 软件 描述
LTC4257IDD#TRPBFPDF下载 点击下载 点击下载 采用紧凑型 16mm2封装的 4A 多节电池/化学电池充电器控制器无需隔离二极管
数据表 (英文)
文档名称 文档类型 软件 描述
LTC4257IDD#TRPBFPDF下载 点击下载 点击下载 LTC4012/ LTC4012-1/LTC4012-2 - High Efficiency, Multi-Chemistry Battery Charger with PowerPath Control