TPS2377DR-1

Overview

The TPS2377DR-1 is an IEEE 802.3af-compliant Powered Device controller manufactured by Texas Instruments in a SOIC-8 package. It operates within a supply voltage range of 0 V to 57 V and supports Class 3 PoE applications. The device features a current limit of 405 mA, a maximum on-resistance of 1 Ohm, and a quiescent current of 240 uA. It delivers up to 12.95 W of output power and functions reliably across a temperature range of -40°C to +85°C.

Feature Summary

• Supports auto-retry functionality for robust power recovery
• Includes legacy UVLO threshold configuration
• Integrates low-side switch for direct load control

Applications

• VoIP Phones
• WLAN Access Points
• Security Cameras

Procurement Notes

Verify the specific DR-1 suffix indicates the inclusion of auto-retry and legacy UVLO thresholds compared to standard variants. Confirm the SOIC-8 package designation matches your PCB footprint requirements. Ensure compatibility with existing IEEE 802.3af infrastructure before integration into final designs.

Selection Notes

Select this component when auto-retry capabilities are required for system resilience during transient power losses. The integrated switch simplifies bill of materials by reducing external component count. Verify that the 405 mA current limit aligns with the downstream load requirements of the target application.

Part Context

This part belongs to the TPS237x family of IEEE 802.3af PoE Powered Device controllers. It shares core specifications with the TPS2376 and TPS2377 series but distinguishes itself through specific configuration options like auto-retry. It serves as a key interface between Ethernet cabling and local DC loads.

Replacement Considerations

TPS2377DR and TPS2376DR are pin-compatible alternatives within the same family. However, they may lack the specific auto-retry and legacy UVLO features defined for the -1 suffix. Verify functional equivalence regarding these specific control behaviors before substitution.