TPS2384PJD

Overview

The TPS2384PJD is a quad-port Power Sourcing Equipment (PSE) power manager compliant with the IEEE 802.3af standard, designed for Ethernet over LAN applications. It operates from a single 48V supply and supports a wide operating temperature range of -40°C to +125°C. The device integrates four independent ports, each featuring an internal switch with a maximum on-resistance of 1.8 ohms and a current limit of 650 mA. It utilizes a 64-pin HTQFP package.

Feature Summary

• Integrates four independent power switches and detection resistors to eliminate external components per port
• Supports automatic, semi-automatic, and power management modes for flexible system operation
• Includes four independent 15-bit A/D converters for precise measurement of port resistance, voltage, current, and chip temperature
• Features controlled current ramping to reduce EMI and safely charge large capacitive loads

Applications

• IEEE 802.3af compliant PoE midspan injectors
• PoE-powered end-span network switches
• Industrial Ethernet infrastructure equipment
• Outdoor networking access points requiring wide temperature tolerance

Procurement Notes

Verify the specific suffix PJD corresponds to the 64-pin HTQFP package configuration before ordering. Confirm that the required current limit of 650 mA aligns with your port design specifications. Ensure compatibility with the necessary I2C interface speeds and software drivers provided by Texas Instruments for full functionality.

Selection Notes

Select this component when a quad-port solution is required without external discrete FETs or sense resistors. It is suitable for designs needing integrated thermal monitoring and high-voltage transient protection up to 100V. Consider the 64-pin package constraints and the need for an I2C master controller for mode selection and data acquisition.

Part Context

This part belongs to the TPS2384 family of PoE PSE managers. It serves as a core component for simplifying PoE system designs by combining control logic with power switching capabilities. The device replaces complex discrete solutions, reducing board space and component count while maintaining compliance with strict IEEE standards.

Replacement Considerations

The TPS2384PAPRG4 is a documented alternative within the same family, offering similar quad-port functionality but potentially differing in packaging or manufacturing lot specifications. Verify pinout compatibility and software register mapping before substituting.