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Texas Instruments TPS23882B1RTQR
- Part No.:
- TPS23882B1RTQR
- Manufacturer:
- Texas Instruments
- Category:
- Power Over Ethernet (PoE) Controllers
- Package:
- 56-VFQFN Exposed Pad
- Datasheet:
-
TPS23882B1RTQR.pdf
- Description:
- TYPE-3 TWO-PAIR EIGHT-CHANNEL PS
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPS23882B1RTQR from Texas Instruments is an 8-channel IEEE 802.3bt Type-3 2-pair Power Sourcing Equipment (PSE) controller with autonomous mode, SRAM programmability, and 200-mΩ current sense resistor. It delivers up to 30 W per port, supports ±4% programmable power limiting, achieves 2% current sensing accuracy via dedicated 14-bit integrating ADCs, and operates across –40 °C to +125 °C for industrial PoE switch applications.
For engineers reviewing the TPS23882B1RTQR datasheet, TPS23882B1RTQR pinout, TPS23882B1RTQR application, or TPS23882B1RTQR equivalent, this page provides verified technical context, validated pin functions, real-world application mappings, and confirmed alternative PSE controllers for PoE 2 Type-3 2-pair system design and migration.
Technical Context
The TPS23882B1RTQR implements a per-port 14-bit integrating ADC architecture with noise-immune MPS for DC disconnect and parallel classification measurement capability-enabling faster port turn-on times. Its autonomous mode requires no MCU and supports user-selectable 15-W or 30-W operation with 4-W/7-W/15.4-W/30-W configurable 2-pair allocations.
It uses an external N-channel MOSFET architecture with Kelvin-sense current monitoring (SEN1–SEN8 + KSENSA–KSENSD), 4-point detection logic to prevent invalid load powering, and fast shutdown via 1-bit or 3-bit OSS input with sub-microsecond gate turnoff during faults. The device integrates I²C (8-bit or 16-bit) with 16 kB SRAM for field-upgradable firmware compatible with TI's FirmPSE system.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IEEE Standard | Compliant with 802.3bt Type-3 (2-pair only); not compatible with 4-pair or Type-4 operation. |
| Channels | 8 independent PSE ports with per-port voltage/current monitoring and telemetry. |
| RSENSE | 200 mΩ external current sense resistor enables high-accuracy, low-power-loss sensing. |
| Power Limit Accuracy | ±4% programmable power limiting supports precise port-level power budgeting. |
| Current Sensing Accuracy | 2% full-scale accuracy per port using dedicated 14-bit integrating ADCs. |
| Operating Temperature | –40 °C to +125 °C junction temperature range for industrial-grade thermal robustness. |
| I²C Interface | Supports 8-bit or 16-bit addressing; SDAO/SDAI separation enables opto-isolated bus implementation. |
| Autonomous Mode | User-selectable 15-W or 30-W operation without host processor; enabled via AUTO pin resistor network. |
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.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SEN1–SEN8 | Current sense inputs | Differential inputs referenced to KSENSA–KSENSD; monitor external FET current via 0.200-Ω resistor. |
| KSENSA–KSENSD | Kelvin sense return points | Shared Kelvin references: KSENSA (SEN1/SEN2), KSENSB (SEN3/SEN4), etc.-minimizes PCB trace resistance error. |
| GAT1–GAT8 | Gate drive outputs | Drive external N-channel MOSFET gates; sink up to 190 mA during fault or reset; include fast turnoff (<5 µs). |
| DRAIN1–DRAIN8 | Port voltage monitor & detection sense | Measure VPWR-to-DRAIN voltage for PD detection, power-good, foldback, and 4-point signature validation. |
| SCL / SDAI / SDAO | I²C interface signals | SCL clock input; SDAI data input; SDAO open-drain output-supports isolated or non-isolated bus topologies. |
| AUTO | Autonomous mode control | Active-low enable: tied to GND via resistor + 10-nF capacitor selects 15-W/30-W self-contained operation. |
| OSS | Fast port shutdown input | 1-bit or 3-bit active-high input with deglitch filter; triggers immediate gate turnoff with priority-based multi-port control. |
| INT | Interrupt output | Open-drain signal asserting low on interrupt register event (e.g., port fault, classification complete, overcurrent). |
Key Features
| Feature | Design Value |
|---|---|
| SRAM programmability | 16 kB I²C-accessible SRAM enables in-field firmware updates for IEEE compliance and interoperability maintenance. |
| Per-port ADC architecture | Dedicated 14-bit integrating ADC per channel enables simultaneous classification and real-time current telemetry without host intervention. |
| Never-fooled 4-point detection | Validates PD signature using dual-current sinking and voltage measurement-rejects capacitive loads, shorts, and opens reliably. |
| Inrush & operational foldback | Configurable current foldback limits MOSFET power dissipation during startup and short-circuit events, protecting external FETs. |
| Port remapping | Enables flexible PCB layout by reassigning logical port numbers to physical pins-simplifies routing for varying port count designs. |
| Pin-to-pin compatibility | Direct replacement for TPS2388, TPS23880, and TPS23881 in 2-layer PCB designs-reduces redesign effort during platform upgrades. |
Applications
| Video Surveillance Infrastructure | Small Business Switches |
|---|---|
Use Scenario: Powering multiple IP cameras and PTZ units over Cat5e/Cat6 cabling in NVR/DVR systems with centralized PoE management. IC Role / Device Role / Timing Role: 8-channel PSE controller performing IEEE-compliant detection, classification, power application, and real-time telemetry per port. Use Value: Enables 30-W per-port delivery to high-power PTZ cameras while maintaining ±4% power limiting accuracy and 2% current sensing for thermal safety. |
Use Scenario: Embedded PoE switching in compact SMB routers with 4–8 powered ports supporting VoIP phones, wireless APs, and IoT endpoints. IC Role / Device Role / Timing Role: Autonomous-mode PSE managing power allocation without host CPU-reducing BOM cost and firmware complexity. Use Value: 15-W/30-W selectable autonomous operation eliminates need for external microcontroller, accelerating time-to-market for cost-sensitive platforms. |
| Campus/Branch Network Switches | Industrial Edge Gateways |
Use Scenario: Midspan or endpoint PoE injection in enterprise access switches requiring IEEE 802.3bt Type-3 compliance and multi-vendor PD interoperability. IC Role / Device Role / Timing Role: High-accuracy PSE controller executing parallel classification, capacitance measurement, and fast DC disconnect per port. Use Value: 1 µF–12 µF channel capacitance measurement ensures reliable detection of legacy and modern PDs-even under high cable capacitance conditions. |
Use Scenario: Ruggedized PoE power management in factory-floor gateways connecting sensors, HMIs, and actuators in harsh environments. IC Role / Device Role / Timing Role: Industrial-grade PSE operating from –40 °C to +125 °C with integrated thermal protection and robust ESD immunity (±2 kV HBM). Use Value: Junction temperature rating and 25.3 °C/W RθJA support convection-cooled designs without forced airflow-reducing system cooling overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 2-pair PoE PSE controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS23881RTQR | Supports both 2-pair and 4-pair 802.3bt Type-3/4 operation; includes 4-pair PCUT accuracy ±2.5%; adds channel capacitance measurement (1–12 µF). | Required for 4-pair PoE 2 deployments exceeding 60 W; not suitable if design strictly targets 2-pair-only Type-3. | Select TPS23881RTQR when future 4-pair scalability or higher-power 4-pair operation is needed; otherwise TPS23882B1RTQR offers optimized 2-pair cost/performance. |
| TPS23880RTQR | Pin-compatible but lacks SRAM programmability, FirmPSE firmware support, and autonomous mode; uses 0.255-Ω RSENSE. | Targeted at fixed-function, non-upgradable PoE systems where field firmware updates or MCU-free operation are unnecessary. | Choose TPS23880RTQR only for legacy drop-in replacement where SRAM, autonomous mode, and ±4% power limiting are not required. |
Compared with TPS23881RTQR and TPS23880RTQR, the TPS23882B1RTQR uniquely balances 2-pair-only optimization, field-upgradable SRAM, and autonomous operation-making it ideal for cost-sensitive, thermally constrained, and firmware-evolvable PoE switch designs without 4-pair requirements.
Availability
TPS23882B1RTQR is available at Aetrix Electronics and suitable for video surveillance infrastructure, small business switches, and campus/branch network switches requiring stable component supply, long-term lifecycle support, and guaranteed PoE 2 Type-3 compliance.
Supply support for TPS23882B1RTQR 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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, energy efficiency, and system-level integration.
The TPS23882B1RTQR belongs to TI's PoE PSE controller product line, engineered specifically for IEEE 802.3bt-compliant 2-pair Type-3 power delivery in space-constrained, thermally demanding, and firmware-upgradable networking equipment.
FAQ
What is the maximum per-port power supported by the TPS23882B1RTQR?
The TPS23882B1RTQR supports up to 30 W per port in 2-pair configuration under IEEE 802.3bt Type-3 compliance. It offers selectable allocations of 4 W, 7 W, 15.4 W, or 30 W per port. This limit is enforced via programmable power limiting with ±4% accuracy and validated by per-port current sensing using its 14-bit integrating ADCs and 0.200-Ω sense resistor. The TPS23882B1RTQR does not support 4-pair operation or Type-4 power levels.
Does the TPS23882B1RTQR require an external microcontroller to operate?
No-the TPS23882B1RTQR supports autonomous mode via its dedicated AUTO pin, enabling standalone 15-W or 30-W operation without any host MCU. When the AUTO pin is pulled to GND through a resistor and bypassed with a 10-nF capacitor, the device executes full PD detection, classification, power application, and telemetry independently. An MCU is only required for advanced features like I²C programming, SRAM firmware updates, or semi-auto/manual modes.
How does the TPS23882B1RTQR achieve accurate current sensing?
The TPS23882B1RTQR achieves 2% current sensing accuracy using dedicated per-port 14-bit integrating ADCs combined with Kelvin-sense architecture (SEN1–SEN8 + KSENSA–KSENSD) and a precision 0.200-Ω external current sense resistor. Each ADC performs noise-immune measurements with built-in anti-aliasing and 2-µs analog filtering, supporting both real-time telemetry and classification current measurement without host intervention.
Is the TPS23882B1RTQR pin-compatible with earlier TI PSE controllers?
Yes-the TPS23882B1RTQR is pin-to-pin compatible with TPS2388, TPS23880, and TPS23881 in the VQFN-56 (RTQ) package. This allows direct PCB reuse and interchangeable 2-layer designs across generations. However, functional differences exist: TPS23882B1RTQR adds SRAM programmability, autonomous mode, improved RSENSE (0.200 Ω vs. 0.255 Ω), and ±4% power limiting-requiring register and firmware updates despite mechanical compatibility.
What thermal performance can be expected from the TPS23882B1RTQR in a typical design?
In a standard 2-layer PCB with proper thermal pad grounding, the TPS23882B1RTQR delivers RθJA = 25.3 °C/W and RθJB = 3.7 °C/W. Its –40 °C to +125 °C operating junction temperature range and integrated thermal protection enable convection-cooled operation in industrial PoE switches. Layout best practices-such as connecting AGND/DGND to the exposed thermal pad and minimizing trace resistance on Kelvin sense paths-are essential to maintain specified accuracy and reliability.
TPS23882B1RTQR 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:
- 65 W
- Internal Switch(s):
- No
- Auxiliary Sense:
- No
- Standards:
- 802.3at (PoE+), 802.3bt
- Voltage - Supply:
- 44V ~ 57V
- Current - Supply:
- 10mA
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-VQFN (8x8)
TPS23882B1RTQR FAQ
1.How can I place an order for TPS23882B1RTQR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS23882B1RTQR 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 TPS23882B1RTQR reliable?
The price and inventory of TPS23882B1RTQR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS23882B1RTQR is usually 5 days.
3.What payment methods are accepted for TPS23882B1RTQR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS23882B1RTQR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS23882B1RTQR?
TPS23882B1RTQR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS23882B1RTQR 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 TPS23882B1RTQR?
For technical support, including TPS23882B1RTQR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS23882B1RTQR requirements.
6.How does Aetrix verify that TPS23882B1RTQR is sourced from the original manufacturer or authorized distributors?
All TPS23882B1RTQR 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 TPS23882B1RTQR meets industry standards.
7.What is the process for return or replacement of TPS23882B1RTQR?
All TPS23882B1RTQR units undergo pre-shipment inspection (PSI). If there is an issue with TPS23882B1RTQR, 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 TPS23882B1RTQR part is unused and in its original packaging.
Return procedure for TPS23882B1RTQR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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