Texas Instruments TPS23882RTQR

Overview

TPS23882RTQR from Texas Instruments is an 8-channel IEEE 802.3bt Type-3 2-pair Power Sourcing Equipment (PSE) controller with integrated SRAM, 200-mΩ current sense resistor support, ±3% programmable power limiting, and per-port 14-bit integrating ADCs. It enables PoE 2 power delivery up to 30 W per port in video recorders, small business switches, and campus/branch infrastructure.

For engineers reviewing the TPS23882RTQR datasheet, TPS23882RTQR pinout, TPS23882RTQR application, or TPS23882RTQR equivalent, this page delivers verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternative options, and supply-chain support details specific to the VQFN-56 package and PoE 2 Type-3 2-pair implementation.

Technical Context

The TPS23882RTQR implements a dedicated per-port analog front-end with Kelvin-sense current measurement across eight channels using four shared KSENS inputs (KSENSA–D), enabling simultaneous classification and DC disconnect detection. Its 4-point PD detection logic avoids false powering by measuring VPWR-to-DRAINn voltage while sinking dual-current levels through DRAINn pins.

It supports flexible I2C communication (8-bit or 16-bit mode), SRAM-based field firmware upgrades via FirmPSE, and three operating modes-auto, semi-auto, and manual/diagnostic-with fast port shutdown via 1-bit or 3-bit OSS input. The device operates from –40°C to +125°C with 54-V VPWR supply and 3.3-V VDD logic rail.

Key Specifications

Pinout & Package

VQFN-56 (RTQ) package, 8.00 mm × 8.00 mm body size with exposed thermal pad; requires low-resistance connection of AGND and DGND to PCB ground plane via thermal pad.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PoE 2 PSE applications.

Compared with TPS23880RTQR and TPS23881RTQR, the TPS23882RTQR uniquely balances 2-pair-only optimization, SRAM-based field updates, and legacy PD compatibility-making it the optimal choice for dedicated 8-port Type-3 midspans where 4-pair capability adds no value but firmware longevity matters.

Availability

TPS23882RTQR is available at Aetrix Electronics and suitable for video surveillance NVRs, small business switches, and campus branch infrastructure requiring stable component supply, long lifecycle support, and guaranteed PoE 2 Type-3 compliance.

Supply support for TPS23882RTQR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity solutions, with decades of leadership in Power over Ethernet technology.

The TPS23882RTQR belongs to TI's high-density PSE controller product line, designed specifically for compact, thermally efficient 8-channel 2-pair PoE 2 midspan and endpoint systems targeting enterprise and industrial networking.

FAQ

What is the maximum per-port power supported by the TPS23882RTQR?

The TPS23882RTQR supports up to 30 W per port in 2-pair configuration under IEEE 802.3bt Type-3. It does not support 4-pair operation or Type-4 (up to 90 W). The device implements programmable power limiting with ±3% accuracy across its selectable 2-pair allocations: 4 W, 7 W, 15.4 W, and 30 W. This ensures precise enforcement of Class 3 power budgets without oversizing external FETs or heatsinks.

Does the TPS23882RTQR support legacy 802.3af/at PDs?

Yes, the TPS23882RTQR supports legacy PDs via its built-in capacitance measurement circuit (1 µF to 12 µF range) and 4-point detection that validates signature resistance (19–26.5 kΩ) and open-circuit voltage (>23.5 V). It performs legacy PD classification using standard Mark/No-Mark sequences and maintains backward compatibility with 802.3af Type 1 and 802.3at Type 2 devices without requiring external components.

How does the TPS23882RTQR handle thermal management in high-density designs?

The TPS23882RTQR uses a VQFN-56 package with an exposed thermal pad requiring low-resistance connection to the PCB ground plane. Its thermal metrics include RθJB = 3.7 °C/W and RθJC(bot) = 0.5 °C/W, enabling efficient heat transfer to the board. Combined with per-port current foldback and fast (<1 µs) short-circuit shutdown, the device sustains full 30-W operation across all eight ports within its –40°C to +125°C junction temperature rating when properly laid out.

Can the TPS23882RTQR be used in isolated I²C systems?

Yes, the TPS23882RTQR supports isolated I²C via separate SDAI (input) and SDAO (open-drain output) pins, allowing galvanic isolation using optocouplers or digital isolators. The device does not require bidirectional data sharing on a single line-SDAI receives commands while SDAO transmits responses-enabling robust noise immunity in electrically noisy PoE switch environments without compromising timing or register access integrity.

What is the role of the KSENS pins on the TPS23882RTQR?

The KSENSA–D pins provide Kelvin reference points for differential current sensing across the 0.200-Ω external resistors. Each KSENS pin serves two adjacent SEN inputs (e.g., KSENSA references both SEN1 and SEN2), minimizing PCB trace resistance errors and enabling ±2% current measurement accuracy. Proper layout-short, matched traces between KSENS/SEN and the sense resistor-is required to achieve specified performance; floating or misrouted KSENS pins degrade sensing fidelity.