TPS2370DR

Specialized Overview

The TPS2370DR is a power interface switch for IEEE 802.3af Powered Devices (PDs) in an 8-pin SOIC package. It operates within an input voltage range of 48 V to 57 V and supports a junction temperature range of 0°C to 70°C. The device features an internal 0.3-Ω low-side FET, programmable inrush current limiting, and thermal protection. Supply characteristics include a sleep current of 180 µA to 300 mA during startup and an offset current of 3 µA at 1.8 V. Thermal impedance from junction-to-ambient is 176.0°C/W.

Specialized Feature Summary

• Performs detection and classification protocols compliant with the IEEE 802.3af standard
• Interfaces directly with DC/DC converter soft-start or enable signals
• Includes internal thermal shutdown that disconnects the load upon overheating

Specialized Applications

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

Specialized Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest documentation to confirm the exact package type and tape-and-reel specifications. Confirm the operational temperature range matches the design requirements before finalizing procurement orders.

Specialized Selection Notes

Select this component for applications requiring strict adherence to IEEE 802.3af detection and classification standards. Ensure the external circuitry accommodates the required RLIM resistor values for inrush current programming and verify compatibility with the downstream DC/DC converter's soft-start timing.

Specialized Part Context

This part belongs to the Texas Instruments TPS237x family of PoE powered device controllers. It serves as the primary interface between the Ethernet cabling and the local power conversion stage, handling all high-voltage switching and protocol signaling tasks defined by the legacy 802.3af specification.

Specialized Replacement Considerations

Public confirmed substitute part numbers: TPS2370PW, TPS2370PWR.