TPS2370PWR

Specialized Overview

The TPS2370PWR is an integrated IEEE 802.3af Powered Device (PD) interface controller manufactured by Texas Instruments in an 8-pin TSSOP package. It manages detection, classification, and power path control for PoE applications. The device operates with a recommended input voltage range of 44 V to 57 V and supports Class 0 through Class 4 signatures. Key electrical parameters include a typical sleep current of 180 mA during startup, an internal 0.3-Ω low-side FET, and programmable inrush current limiting ranging from 50 mA to 449 mA via an external resistor. Thermal shutdown activates at 144°C with 20°C hysteresis.

Specialized Feature Summary

• Integrated Power Interface Switch compliant with IEEE 802.3af standards
• Programmable Inrush Current Limiting for flexible load capacitance management
• Internal Low-Side FET for efficient power path control
• DC/DC Converter Enable Interface for synchronized soft-start operation

Specialized Applications

• VoIP Phones
• Internet Appliances
• Wireless LAN Access Points
• Bluetooth Access Points

Specialized Procurement Notes

Verify the specific ordering suffix 'R' indicates tape-and-reel packaging containing 2000 units per reel. Confirm the component status as NRND (Not Recommended for New Designs) before initiating procurement. Ensure the selected package variant matches the required manufacturing assembly process and storage conditions.

Specialized Selection Notes

Select this component for designs requiring strict adherence to IEEE 802.3af PD protocols. Evaluate the thermal impedance of the TSSOP package against the expected ambient temperature and power dissipation. Ensure the external ILIM resistor value correctly sets the inrush current limit to accommodate the downstream DC/DC converter's input capacitance requirements.

Specialized Part Context

This part belongs to the TPS237x family of PoE controllers designed for powered devices. It serves as the front-end interface between the Ethernet cable and the local DC/DC converter. The device simplifies system design by integrating detection and classification logic, reducing the need for complex external circuitry typically required for PoE compliance.

Specialized Replacement Considerations

Public confirmed substitute part numbers: TPS2370PW, TPS2370D.