TPS23851DCER

Overview

The TPS23851DCER is a quad-port Power Sourcing Equipment (PSE) controller designed for IEEE 802.3af compliant Ethernet applications. It integrates four independent channels to manage power insertion onto twisted-pair cables. The device supports hot-swap functionality and includes comprehensive protection features such as overvoltage, overcurrent, and thermal shutdown. Packaged in a 36-pin SSOP, it provides a compact solution for multi-port PoE injectors and switches.

Feature Summary

• Integrates four independent PSE channels for simultaneous power delivery
• Supports IEEE 802.3af standard classification and detection protocols
• Includes built-in hot-swap control for safe connection under load
• Provides comprehensive fault protection including thermal and current limiting

Applications

• Multi-port PoE injectors
• PoE-enabled network switches
• Ethernet-powered access points
• IP camera power distribution units

Procurement Notes

Verify component status carefully as this part may be obsolete or end-of-life. Confirm availability through authorized distributors or secondary market suppliers. Ensure the specific DCER suffix matches your board design requirements. Check for lead times and minimum order quantities with suppliers. Validate authenticity and storage conditions before integration into production systems.

Selection Notes

Select this controller for designs requiring four isolated PoE ports within a single IC footprint. It is suitable for applications needing strict adherence to IEEE 802.3af standards. Consider the 36-pin SSOP package constraints during PCB layout. Evaluate thermal management needs due to integrated power handling capabilities across all four channels.

Part Context

This component belongs to Texas Instruments' portfolio of PoE controllers. It is part of the TPS2385x family, which offers scalable solutions for Ethernet power sourcing. The device complements other TI analog and mixed-signal products used in networking infrastructure. It serves as a key building block for modern powered Ethernet devices.

Replacement Considerations

Check for direct pin-to-pin replacements from Texas Instruments or compatible vendors. Verify electrical compatibility with existing IEEE 802.3af implementations. Ensure substitute components support the same quad-channel architecture. Confirm package dimensions match the original 36-pin SSOP form factor.