My Inquiry
My Account
Texas Instruments TPS23881RTQT
- Part No.:
- TPS23881RTQT
- Manufacturer:
- Texas Instruments
- Category:
- Power Over Ethernet (PoE) Controllers
- Package:
- 56-VFQFN Exposed Pad
- Datasheet:
-
TPS23881RTQT.pdf
- Description:
- IC POE CNTRL 8 CHAN IEEE 802.3BT
- Quantity:
- Payment:
- Shipping:
Inventory:470
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS23881RTQT from Texas Instruments is an 8-channel IEEE 802.3bt Type-4 Power Sourcing Equipment (PSE) controller supporting 4-pair PoE up to 90 W per port, featuring 200 mΩ integrated current sense resistors, ±2.5% programmable power limiting accuracy, and SRAM-based firmware upgradability via I²C for interoperability with latest PoE devices in NVRs and campus switches.
For engineers reviewing the TPS23881RTQT datasheet, TPS23881RTQT pinout, TPS23881RTQT application, or TPS23881RTQT equivalent, this page delivers verified technical context, real-world port configuration options (2-pair/4-pair), per-port ADC telemetry, fast shutdown inputs, and thermal design guidance for high-density PoE switch implementations requiring stable 54-V operation and -40°C to +125°C reliability.
Technical Context
The TPS23881RTQT implements a dedicated 14-bit integrating current ADC per channel for noise-immune DC disconnect and 2% current sensing accuracy, paired with Kelvin-sense architecture (KSENSA–D) for precision measurement across eight independent ports. Its external N-channel FET control uses GAT1–8 outputs with sub-5 µs turnoff on OSS input and fast overload protection (<1 µs).
It supports IEEE 802.3bt Type 3/4 classification, legacy PD capacitance measurement (1–12 µF), and flexible operating modes-auto, semi-auto, and manual/diagnostic-enabling system-level coordination via TI's FirmPSE firmware. The device operates from a 54-V VPWR supply with UVLO thresholds at 15.5–18.5 V (rising) and integrates RSENSE = 0.200 Ω for reduced power loss and thermal footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IEEE Standard | Complies with IEEE 802.3bt for Type 3/4 PSE; enables 4-pair 90 W per port delivery. |
| Channels | Eight independent PSE channels configurable as 2-pair (1 ch/port) or 4-pair (2 ch/port) ports. |
| RSENSE | Integrated 200 mΩ current sense resistor reduces board area and improves thermal efficiency vs. 255 mΩ in TPS23880. |
| Power Limit Accuracy | ±2.5% programmable port power limit enables expansion beyond 90 W (e.g., >125 W with margin). |
| Current Sensing | Dedicated 14-bit per-port ADC with 2% accuracy and MPS-based DC disconnect immunity to noise. |
| Operating Temp | -40°C to +125°C junction temperature range supports industrial-grade deployment in uncooled switch chassis. |
| I²C Interface | SRAM-programmable via I²C (400 kHz) with separate SDAI/SDAO for opto-isolated control and field firmware updates. |
Pinout & Package
VQFN-56 (RTQT) package with 8.00 mm × 8.00 mm body and exposed thermal pad; requires low-resistance connection of AGND/DGND pins to PCB ground plane through thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DRAIN1–8 | Port voltage monitor & detection sense | Measures VPWR-to-DRAINn differential for PD detection, power-good, foldback; supports 4-point discovery to avoid invalid load powering. |
| GAT1–8 | External N-FET gate drive output | Drives external MOSFET gates; sinks ≥60 mA during fault shutdown; includes <5 µs turnoff on OSS input. |
| SEN1–8 / KSENSA–D | Current sense input with Kelvin reference | Kelvin pairs (e.g., KSENSA with SEN1/2) enable accurate 0.200 Ω RSENSE measurement, minimizing PCB layout error impact. |
| OSS | Fast port shutdown input | Active-high 1- or 3-bit priority shutdown signal; deglitched (1–5 µs); supports selective multi-port turnoff without software intervention. |
| VPWR | High-voltage analog supply | Nominally 54 V input (range: 44–57 V); UVLO rising threshold at 15.5–18.5 V ensures safe startup under brownout. |
| VDD | Digital logic supply | 3.3 V ±0.3 V supply; internal UVLO hysteresis (0.35 V) prevents erratic reset during rail droop. |
Key Features
| Feature | Design Value |
|---|---|
| Per-port ADC telemetry | Continuous current/voltage monitoring with 82–122 ms integration time enables real-time port policing and dynamic power budgeting. |
| Programmable 2-/4-pair allocation | Selectable 15.4 W, 30 W, 45 W, 60 W, 75 W, or 90 W per port supports mixed-device networks (e.g., IP cameras + APs). |
| Inrush & foldback protection | Configurable ILIM thresholds (1X/2X mode) and 10–140 ms time limits prevent MOSFET damage during short-circuit or hot-plug events. |
| Legacy PD compatibility | Capacitance measurement (1–12 µF) and single/dual signature detection ensure interoperability with pre-802.3bt powered devices. |
| FirmPSE firmware support | Enables coordinated control of up to 48 ports across multiple TPS23881RTQT devices using TI's scalable system firmware stack. |
Applications
| Video Surveillance Systems | Enterprise Network Switches |
|---|---|
Use Scenario: Powering multi-sensor PTZ cameras and AI-enabled edge analytics nodes over Cat6a cabling in outdoor NVR deployments. IC Role / Device Role / Timing Role: Primary PSE controller managing eight concurrent 4-pair PoE ports with auto-class discovery and real-time current telemetry. Use Value: Enables 90 W delivery per port for high-power imaging subsystems while maintaining IEEE compliance and thermal safety at 125°C ambient. | Use Scenario: High-density 24- or 48-port campus switches supporting Wi-Fi 6E access points, VoIP phones, and IoT gateways. IC Role / Device Role / Timing Role: Core PSE engine implementing per-port power limiting, fast shutdown, and firmware-upgradable classification logic. Use Value: Delivers ±2.5% power accuracy and 200 mΩ RSENSE to maximize power budget utilization across mixed-load networks. |
| Small Business Switches | Industrial Control Hubs |
Use Scenario: Compact 8–16 port managed switches for retail or branch offices with mixed PoE device loads (cameras, phones, signage). IC Role / Device Role / Timing Role: Integrated PSE controller providing 2-pair/4-pair flexibility, SRAM-based field updates, and I²C-managed diagnostics. Use Value: Reduces BOM count by eliminating discrete current sense amplifiers and enables remote firmware patches for evolving IEEE standards. | Use Scenario: Ruggedized DIN-rail mounted PoE hubs powering industrial cameras, sensors, and HMIs in factory automation systems. IC Role / Device Role / Timing Role: Robust PSE interface with -40°C to +125°C operation, Kelvin-sense accuracy, and fast fault response for mission-critical uptime. Use Value: Ensures reliable 4-pair power delivery under wide temperature swings and EMI-heavy environments via noise-immune ADC architecture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PoE PSE controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS23880RTQT | Same 8-channel VQFN-56 pinout; uses 255 mΩ RSENSE; ±3.0% 90+ W PCUT accuracy; no ULA packaging. | Lacks SRAM programmability and 200 mΩ RSENSE; lower power accuracy limits max usable port power. | Choose when cost sensitivity outweighs need for field firmware upgrades or >90 W headroom. |
| TPS23882RTQT | Pin-compatible 8-channel variant; supports only 2-pair (Type 3) PoE; no 4-pair capability or 90 W+ operation. | Restricted to ≤60 W per port; unsuitable for 4-pair Type 4 applications like high-end APs or PTZ cameras. | Select only for 2-pair-only deployments where 4-pair scalability is unnecessary. |
Compared with TPS23880RTQT and TPS23882RTQT, the TPS23881RTQT uniquely combines 4-pair Type 4 support, 200 mΩ RSENSE, ±2.5% power limiting, and SRAM-based firmware upgradability-making it the only option among the three for future-proof, high-power, field-maintainable PoE infrastructure.
Availability
TPS23881RTQT is available at Aetrix Electronics and suitable for video surveillance systems, enterprise network switches, and industrial control hubs requiring stable component supply, long-term lifecycle support, and guaranteed IEEE 802.3bt compliance.
Supply support for TPS23881RTQT 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 company specializing in analog and embedded processing technologies, with leadership in power management, signal chain, and connectivity solutions.
The TPS23881RTQT belongs to TI's PoE PSE controller product line, engineered specifically for high-density, multi-gigabit Ethernet infrastructure demanding precise 4-pair power delivery, thermal resilience, and firmware agility across evolving IEEE standards.
FAQ
What is the maximum per-port power supported by the TPS23881RTQT?
The TPS23881RTQT supports up to 90 W per port in IEEE 802.3bt Type 4 4-pair mode. With its ±2.5% programmable power limiting accuracy and 200 mΩ RSENSE, designs can safely extend beyond 90 W-up to approximately 125 W-with appropriate thermal derating and MOSFET selection. This headroom is validated in TI's application notes for high-power PoE systems using the TPS23881RTQT.
Does the TPS23881RTQT support legacy PoE devices (802.3af/at)?
Yes, the TPS23881RTQT supports single- and dual-signature PDs and includes legacy PD capacitance measurement (1–12 µF range), ensuring full interoperability with IEEE 802.3af and 802.3at devices. Its detection algorithm complies with all backward-compatible timing and resistance thresholds defined in those standards, and the TPS23881RTQT datasheet confirms operation with pre-802.3bt powered equipment.
How does the Kelvin-sense architecture improve current measurement accuracy in the TPS23881RTQT?
The TPS23881RTQT uses four Kelvin sense pairs (KSENSA–D) to perform differential voltage measurements across its 0.200 Ω current sense resistors-separating sense paths from power return paths. This eliminates errors from PCB trace resistance and thermal EMF, enabling 2% current sensing accuracy even under high-current, high-temperature conditions. Each KSENS pair serves two adjacent SEN pins (e.g., KSENSA for SEN1/SEN2), as documented in the TPS23881RTQT pin function table.
Can the TPS23881RTQT be used without external microcontroller control?
No-the TPS23881RTQT requires an external host processor for initialization, register configuration, and runtime supervision. It lacks autonomous operation mode; all functional modes (auto, semi-auto, manual/diagnostic) are controlled via I²C commands. The TPS23881RTQT datasheet explicitly states that "Autonomous operation description [was] deleted for clarification," confirming dependency on host firmware such as TI's FirmPSE stack.
What thermal design considerations apply to the TPS23881RTQT in high-power PoE applications?
The TPS23881RTQT has RθJB = 3.7 °C/W and requires low-impedance thermal connection of both AGND and DGND pins to the PCB ground plane via the exposed thermal pad. For continuous 90 W/port operation across all eight channels, TI recommends ≥4 oz copper, thermal vias under the pad, and airflow ≥200 LFM. Junction temperature must remain ≤125°C, and the TPS23881RTQT's thermal metrics are validated per JEDEC JESD51 standards in the official datasheet.
TPS23881RTQT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 56-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Controller (PSE)
- Number of Channels:
- 8
- Power - Max:
- 127 W
- Internal Switch(s):
- No
- Auxiliary Sense:
- No
- Standards:
- 802.3at (PoE+), 802.3bt
- Voltage - Supply:
- 3V ~ 3.6V
- Current - Supply:
- 6mA
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-VQFN (8x8)
TPS23881RTQT FAQ
1.How can I place an order for TPS23881RTQT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS23881RTQT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TPS23881RTQT reliable?
The price and inventory of TPS23881RTQT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS23881RTQT is usually 5 days.
3.What payment methods are accepted for TPS23881RTQT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS23881RTQT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS23881RTQT?
TPS23881RTQT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS23881RTQT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TPS23881RTQT?
For technical support, including TPS23881RTQT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS23881RTQT requirements.
6.How does Aetrix verify that TPS23881RTQT is sourced from the original manufacturer or authorized distributors?
All TPS23881RTQT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS23881RTQT meets industry standards.
7.What is the process for return or replacement of TPS23881RTQT?
All TPS23881RTQT units undergo pre-shipment inspection (PSI). If there is an issue with TPS23881RTQT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TPS23881RTQT part is unused and in its original packaging.
Return procedure for TPS23881RTQT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS23881RTQT Tags
-
TPS2378DDAR
Texas Instruments
-
TPS23753APWR
Texas Instruments
-
TPS23756PWPR
Texas Instruments
-
TPS23750PWPR
Texas Instruments
-
MP8007GV-Z
Monolithic Power Systems Inc.
-
TPS23861PWR
Texas Instruments
-
TPS23753PWR
Texas Instruments
-
PD69201ILD-TR
Microchip Technology
-
SI3402-B-GM
Skyworks Solutions Inc.
-
SI3402-B-GMR
Skyworks Solutions Inc.
-
SI34071-A01-GMR
Skyworks Solutions Inc.
-
SI3404-A-GMR
Skyworks Solutions Inc.
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
