Hybrid Protection Module Guards Ethernet Ports from Sustained Overcurrent and Overvoltage

Known-good solution to protect sensitive PHY chips from damage due to ESDs and lightning-induced surge events

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2018年11月7日

Littelfuse, Inc.today introduced the first of a series of TVS Diode Arrays (SPA^®Diodes) designed to protect two lines of 10/100/1000BaseT Ethernet ports from damage due to sustained overcurrent and overvoltage. Through-package routing permits the SP4031 Series Hybrid Protection Module’s circuitry to protect an Ethernet PHY chip from damage due to events such as electrostatic discharge (ESD) and lightning-induced surge.

During a prolonged overvoltage event such as a power fault, this component will present a high impedance. The high impedance state will reset once the power fault event has ended. During a fast transient event, the component will clamp, thus protecting any downstream chipset from surge or ESD damage.

SP4031系列的低负载电容（每I/O仅2.5pf）和高电涌处理能力（最多35A）使其非常适合保护以太网和其他高速数据接口。SP4031系列混合保护模块的典型应用包括10/100/1000BASET以太网（ITU K.21基本级别合规性），以及集成的磁化功能，或ADSL/VDSL/VDSL/G.Fast Modem，以及工业以太网和智能电视。

“The SP4031 Series Hybrid Protection Module combines some of the best products from our Electronics Business Unit with some of the best products from our Semiconductor Business Unit to create a hybrid, known-good solution for the Ethernet protection designer,” said Tim Micun, Business Development Manager, TVS Diode Arrays (SPA® Diodes) at Littelfuse. “Its’ fast response protects Ethernet and other high speed interfaces faster, which means protecting better, because long-term exposure to overvoltage or overcurrent shortens chip life.”

SP4031系列混合保护模块提供了以下关键好处：

Known-good design for overvoltage and overcurrent events provides a proven turnkey solution for protecting Ethernet PHY.
通过包装路由，低分解电压和低寄生电容可产生一种在以太网速度高达1000 mbits的设备。
During a high current event, creates a temporary high impedance which interrupts the flow of the signal lines and damage to the PHY chip.

Availability
SP4031系列混合保护模块可在磁带和卷轴格式的SOIC-8包装中获得2,500次。样本请求可以通过全球授权的Littelfuse分销商提出。有关Littelfuse分销商的列表，请访问littelfuse.com。

For More Information
Additional information is available on theSP4031 Series Hybrid Protection Module product page。有关技术问题，请联系：TVS二极管阵列业务开发经理Tim Micun（SPA）^®Diodes),tmicun @littelfuse.com。