TPS2384PAPG4

Overview

The TPS2384PAPG4 is a four-port Power Sourcing Equipment (PSE) power manager compliant with the IEEE 802.3af standard, designed for Ethernet over Power applications. It operates from a single 48V supply and supports an extended temperature range of -40°C to +125°C. The device integrates four independent switches with current sensing, eliminating external components. Each port features a 15-bit A/D converter for measuring resistance, voltage, current, and chip temperature. Key electrical parameters include a maximum on-resistance of 1.8 Ohms, a current limit of 450 mA, and a quiescent operating current of 10 mA. It utilizes a 64-pin HTQFP PowerPAD package.

Feature Summary

• Integrates four independent power switches and detection resistors to simplify design by removing external FETs and sense components.
• Includes four dedicated 15-bit analog-to-digital converters for precise monitoring of port resistance, voltage, current, and internal die temperature.
• Supports multiple operational modes including Automatic Mode (AM), Semi-Automatic Mode (SAM), and Power Management Mode (PMM) via I²C interface.
• Provides comprehensive protection mechanisms such as over-temperature protection, controlled current ramping for EMI reduction, and AC/DC disconnect capabilities.

Applications

• Enterprise-grade Ethernet switches requiring integrated PoE management
• Mid-span power injectors and Ethernet hubs for SOHO environments
• Centralized PSE systems utilizing software-controlled power allocation

Procurement Notes

Verify the specific suffix 'G4' indicates RoHS compliance and lead-free manufacturing status according to Texas Instruments documentation. Confirm the 'PA' designation corresponds to the 64-pin PowerPAD HTQFP package variant. Ensure compatibility with existing PCB footprints for the 10mm x 10mm exposed pad thermal solution. Check for any recent Product Change Notifications regarding pinout or material updates before finalizing procurement.

Selection Notes

Select this component when designing systems requiring full IEEE 802.3af compliance with integrated switch control. It is suitable for applications needing detailed per-port telemetry via high-resolution ADCs. Consider this part for designs prioritizing reduced bill-of-materials count by integrating power switching and sensing. Evaluate the need for I²C programmability if dynamic power management or non-standard PD detection is required.

Part Context

This device belongs to the TPS2384 family of PoE controllers manufactured by Texas Instruments. It serves as a core component for Type-1 PoE implementations. The family focuses on providing robust power management with extensive diagnostic capabilities. It complements other TI PMIC solutions by handling the specific requirements of Ethernet power sourcing equipment standards.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source data. Verify functional equivalence with legacy TPS2384 variants or newer IEEE 802.3at/at-compatible controllers if system requirements evolve beyond Type-1 specifications.