IEEE 802.3af标准的电源接口开关，用于以太网供电（ PoE）的供电设备 IEEE 802.3af POWER INTERFACE SWITCH FOR POWER OVER ETHERNETPoE POWERED DEVICES
DESCRIPON
Acting as an interface between the power sourcing equipment PSE and the powered device PD, the TPS2370 performs all detection, classification, inrush current limiting, and switch FET control that is necessary for compliance with the IEEE 802.3af Standard. An internal 0.3-Ω FET provides maximum power delivery. As an additional feature, the TPS2370 interfaces with the enable/soft-start signal of a dc-to-dc converter, eliminating the need to have an accurate UVLO in the dc-to-dc converter.
FEATURES
• Integrated Power Interface Switch for IEEE 802.3af Powered Devices PDs
• Provides PD Detection Signature
• Provides PD Classification Signature Class 0−4
• Programmable Inrush Current Limit
• Internal 0.3-Ω Low-Side FET
• Interfaces to DC/DC Soft-Start for DC/DC Enable
• Internal Thermal Protection – Disconnects PD Load
• Minimal External Parts Count
• 8-Pin SOIC, 8-Pin TSSOP Packages
APPLICATIONS
• VoIP Phones
• Internet Appliances
• Wireless LAN Access Points
• Bluetooth Access Points
