TPS23841PJDG4

Overview

The TPS23841PJDG4 is a quad-channel Power Sourcing Equipment (PSE) controller designed for IEEE 802.3af PoE applications. It integrates four high-voltage power switches with a maximum on-resistance of 1.8 ohms and a current limit of 650 mA per channel. The device operates within a wide supply voltage range of 44V to 57V and supports an operating temperature range from -40°C to +125°C. Housed in a 64-pin HTQFP package, it provides comprehensive protection features including overcurrent, thermal, and reverse polarity protection.

Feature Summary

• Integrates four independent high-voltage power switches for simultaneous port management
• Provides comprehensive fault protection including overcurrent, thermal shutdown, and reverse polarity detection
• Supports wide input voltage operation suitable for standard and extended PoE voltage ranges
• Includes programmable delay timers for precise classification and power-up sequencing

Applications

• Quad-port IEEE 802.3af compliant Power Sourcing Equipment (PSE)
• High-density Ethernet switch designs requiring integrated PSE functionality
• Industrial networking equipment operating in extreme temperature environments
• PoE midspan injectors with multiple port capabilities

Procurement Notes

Verify the specific suffix 'G4' indicates lead-free compliance and RoHS status as per Texas Instruments documentation. Confirm the package marking and date code align with manufacturing records. Ensure ESD handling procedures are followed due to the sensitivity of the CMOS internal circuitry. Cross-reference the datasheet revision to ensure feature compatibility with system requirements.

Selection Notes

Select this component when a single IC solution is required to manage four PoE ports with integrated switching capability. It is suitable for designs needing wide operating temperature ranges and robust fault protection without external discrete switches. Consider the HTQFP-64 package constraints for PCB layout and thermal dissipation requirements compared to alternative pin-count options.

Part Context

This part belongs to the TPS2384x family of quad-channel PSE controllers from Texas Instruments. It serves as an integrated solution for managing power delivery over Ethernet cables, combining control logic with power switching elements. The family is designed to simplify the implementation of IEEE 802.3af compliant systems by reducing component count and board space.

Replacement Considerations

The TPS23841PAPR is a functional equivalent in the same family but utilizes a different package type. Verify pin-to-pin compatibility and thermal performance differences before substitution. Ensure that any replacement maintains the same voltage ratings and current limits for the target application.