TPS2371 Datasheet PDF | Texas Instruments

Texas Instruments TPS2371

the TPS2371 performs all detection, class− ification, inrush current limiting, and switch FET control that is necessary for compatibility with Legacy/IEEE 802.3af Standard. The TPS2371 incorporates precision UVLO thresholds and hysteresis as well as a UVLO off-time delay to enable Legacy IEEE802.3af PoE compatibilty. As an additional feature, the TPS2371 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.

Part No.	TPS2371
Datasheet	TPS2371 Download
Manufacturer	Texas Instruments
Description	Power Interface Switch
Buy	Stock & Price

FEATURES

D Integrated Power Interface Switch for IEEE 802.3af Powered Devices (PDs) D Precision UVLO Thresholds D 20-ms UVLO Off-Time Delay D Provides PD Detection Signature D Provides PD Classification Signature (Class 0−4) D Programmable Inrush Current Limit D Internal 0.3-Ω Low-Side FET D Interfaces to DC/DC Soft-Start for DC/DC Enable D Internal Thermal Protection – Disconnects PD Load D 8-Pin SOIC, 8-Pin TSSOP Packages

APPLICATIONS

D VoIP Phones D Internet Appliances D Wireless LAN Access Points D Bluetooth Access Points

DESCRIPTION

Acting as an interface between the Power Source Equipment (PSE) and the Powered Device (PD), An internal 0.3-Ω FET provides maximum power delivery. At low input voltages (1.8 V to 10 V), the TPS2371 draws less than 12 µA, allowing accurate sensing of the external 24.9-kΩ discovery resistor. At input voltages between 15 V and 20 V, an external resistor sets the level of current to be drawn during classification mode. TPS2371 is compatible with current as well as voltage measurement schemes for classification.