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Texas Instruments TPS23841PAP
- Part No.:
- TPS23841PAP
- Manufacturer:
- Texas Instruments
- Category:
- Power Over Ethernet (PoE) Controllers
- Package:
- 64-PowerTQFP
- Datasheet:
-
TPS23841PAP.pdf
- Description:
- IC POE CNTRL 4 CHANNEL 64HTQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,579
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Product details
Overview
TPS23841PAP from Texas Instruments is a quad-port IEEE 802.3af-compliant Power Sourcing Equipment (PSE) manager IC with integrated power switches and sense resistors, operating from 21.5 V to 57 V input, delivering up to 570 mA per port, featuring four 15-bit A/D converters for real-time voltage/current/die temperature monitoring, and supporting auto, semi-auto, and microcontroller-based power management modes in enterprise Ethernet switches and mid-spans.
For engineers reviewing the TPS23841PAP datasheet, TPS23841PAP pinout, TPS23841PAP application, or TPS23841PAP equivalent, this page delivers verified technical context, exact pin functions, confirmed PoE-specific specifications, and validated alternative PSE managers - all grounded in TI's SLUS745A datasheet and official package documentation.
Technical Context
The TPS23841PAP implements a fully integrated quad-port PSE architecture with internal low-side MOSFETs and current-sensing circuitry eliminating external sense resistors per port. It uses proprietary 15-bit integrating A/D converters optimized for 60-Hz noise rejection during discovery, classification, and powered-mode monitoring.
It supports three operational modes: Auto Mode (standalone IEEE 802.3af compliance without MCU), Semi-Auto Mode (I²C-accessible status registers with limited control), and Power Management Mode (full register-level control via 400-kHz I²C interface with MSP430 software support). Internal supply rails (10 V, 6.3 V, 3.3 V, 2.5 V) are generated from the 48-V input and brought out separately for bypassing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Port count | 4 independent PoE ports with full per-port detection, classification, and power delivery control |
| Input voltage range | 21.5 V to 57 V - supports wide-range 48-V PoE infrastructure including mid-span injectors and enterprise switches |
| Per-port current limit | 650 mA nominal - enables up to 25 W per port at PD input under IEEE 802.3af Class 4 |
| A/D resolution | 15-bit integrating converter - provides high-accuracy, noise-immune measurement of port voltage, current, and die temperature |
| I²C interface speed | 400 kHz - enables fast host communication for real-time power management and fault reporting |
| Operating temperature | –40°C to +125°C - qualified for industrial and medical PoE applications requiring extended thermal margin |
| Package | 64-pin TQFP with PowerPAD™ down (PAP) - thermally enhanced for high-power dissipation (θJA = 21.47°C/W) |
Pinout & Package
TPS23841PAP is housed in a 64-pin Thermally Enhanced Thin Quad Flat Package (TQFP) with exposed PowerPAD™ down (PAP) configuration. The PowerPAD must be soldered to a large PCB copper pour for optimal thermal performance and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V48 | Primary power input | Accepts 21.5–57 V PoE supply; requires local 0.1-µF decoupling to AG1 |
| P1–P4, N1–N4 | Port high-side/low-side terminals | Direct connection to Ethernet transformer center taps; internal low-side switching and current limiting |
| CINT1–CINT4 | Integration capacitor inputs | Connect 0.027 µF polycarbonate capacitors to RG for precision A/D conversion per port |
| RBIAS | Bias current reference | 124 kΩ resistor to RG sets internal clock, bias currents, and timing for discovery/classification |
| SCL/SDA_I/SDA_O | I²C interface | 400-kHz bidirectional bus; SDA_O is open-drain for opto-isolation in isolated systems |
| INTB | Fault indicator | Active-low open-drain output asserting on any port UV/OV, overcurrent, DC disconnect, or thermal fault |
Key Features
| Feature | Design Value |
|---|---|
| Integrated power stage per port | Eliminates external MOSFETs and sense resistors - reduces BOM count and layout complexity by 2 components/port |
| Four 15-bit A/D converters | Enables simultaneous, high-resolution monitoring of port voltage, current, signature resistance, and die temperature without external ADCs |
| Controlled current ramp | Reduces EMI during power-up/down - meets CISPR-22 Class B requirements in switch designs |
| Three operational modes | Auto mode enables plug-and-play PoE deployment; PMM enables custom power policies via MSP430 firmware integration |
| AC disconnect support | Dedicated AC_LO/AC_HI outputs drive external AC bridge for legacy PD detection and IEEE 802.3at backward compatibility |
Applications
| Enterprise Ethernet Switches | Medical Imaging Equipment |
|---|---|
Use Scenario: 24-port managed switch delivering PoE to IP phones, wireless APs, and security cameras. IC Role / Device Role / Timing Role: Quad-port PSE manager handling four concurrent PoE channels with real-time current/voltage telemetry and fault isolation. Use Value: Enables per-port power budgeting up to 25 W, supports IEEE 802.3af Class 4 devices, and provides diagnostic data via I²C for SNMP-based network management. |
Use Scenario: Portable ultrasound or MRI console powering PoE-connected transducers and sensors in 24-V medical-grade infrastructure. IC Role / Device Role / Timing Role: High-reliability PSE manager operating across –40°C to +125°C junction range with overtemperature protection and DC disconnect detection. Use Value: Ensures fail-safe power delivery in safety-critical environments with automatic port shutdown on thermal or undervoltage faults. |
| Industrial Mid-Span Injectors | SOHO Hubs & Network Extenders |
Use Scenario: DIN-rail mounted mid-span adding PoE capability to legacy non-PoE switches in factory automation networks. IC Role / Device Role / Timing Role: Standalone quad-port PSE operating in Auto Mode with no microcontroller - self-manages discovery, classification, and power delivery. Use Value: Reduces system cost and design risk by eliminating MCU firmware development while maintaining full IEEE 802.3af compliance. |
Use Scenario: Compact desktop hub providing PoE to VoIP phones and IoT gateways in small office/home office deployments. IC Role / Device Role / Timing Role: Low-pin-count PSE solution leveraging integrated supplies (V3.3, V10, V6.3) to minimize external regulators. Use Value: Simplifies power tree design - V3.3 output supplies up to 2 mA of logic power, reducing need for auxiliary LDOs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PoE PSE manager applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS23861PWR | Single-port PSE manager with identical 15-bit A/D architecture, 400-kHz I²C, and same 21.5–57 V input range but no integrated AC disconnect outputs | Targeted at modular or scalable PSE designs where port count is expanded via multiple ICs rather than quad integration | Select when board space allows discrete port expansion and AC disconnect is not required |
| MAX5980GTJ+ | Quad-port PSE controller with external MOSFET drive only - requires 8 external FETs and 4 sense resistors; supports IEEE 802.3at (30 W/port) | Used in high-efficiency, thermally constrained designs where discrete FET selection optimizes RDS(on) and thermal layout | Select when >25 W/port or discrete FET optimization is mandatory; not drop-in compatible |
Compared with TPS23841PAP, TPS23861PWR offers identical analog accuracy and firmware compatibility but scales port count differently, while MAX5980GTJ+ trades integration for higher power and flexibility - neither matches the TPS23841PAP's combination of quad integration, AC disconnect, and medical-grade temperature range.
Availability
TPS23841PAP is available at Aetrix Electronics and suitable for enterprise Ethernet switches, medical imaging equipment, and industrial mid-span injectors requiring stable component supply, long-term lifecycle assurance, and full IEEE 802.3af compliance.
Supply support for TPS23841PAP 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 power management technologies, with decades of leadership in Ethernet power infrastructure ICs.
The TPS23841PAP belongs to TI's Power over Ethernet (PoE) PSE manager product line, designed specifically for high-reliability, multi-port Ethernet infrastructure requiring integrated power control, precise telemetry, and robust fault management in demanding industrial and medical environments.
FAQ
What is the maximum continuous current per port supported by the TPS23841PAP?
The TPS23841PAP supports a nominal per-port current limit of 650 mA (ILIM), with a typical overcurrent threshold (ICUT) of 615 mA. This enables up to 25 W of power delivery at the PD input under IEEE 802.3af Class 4 conditions. The device sustains this current across its full operating temperature range (–40°C to +125°C) with integrated thermal protection.
Does the TPS23841PAP require an external microcontroller to operate?
No - the TPS23841PAP supports Auto Mode (MS pin low) for fully autonomous IEEE 802.3af operation, performing discovery, classification, and power delivery without any microcontroller. However, a microcontroller (e.g., MSP430) is required to use Power Management Mode for advanced features like AC disconnect, legacy PD detection, and real-time power policy control via the I²C interface.
What package type does the TPS23841PAP use, and how is thermal performance achieved?
The TPS23841PAP uses a 64-pin TQFP package with PowerPAD™ down (PAP) construction. Thermal performance relies on soldering the exposed PowerPAD to a large internal or bottom-layer copper pour - TI specifies θJA = 21.47°C/W using a 2-oz copper trace and pad per SLMA002 guidelines. This enables reliable operation at full 4-port load in industrial ambient conditions.
Can the TPS23841PAP detect and power non-IEEE-compliant (legacy) powered devices?
Yes - in Power Management Mode (MS pin high), the TPS23841PAP supports legacy PD detection using its AC_LO and AC_HI outputs to drive an external AC bridge circuit. This enables identification and safe powering of pre-802.3af devices, such as older VoIP phones, while maintaining full control via the I²C interface and firmware.
What are the key differences between the TPS23841PAP and the TPS23841PJD?
The TPS23841PAP and TPS23841PJD share identical electrical functionality and pinout numbering but differ in PowerPAD orientation: PAP has the thermal pad on the bottom (down), while PJD has it on the top (up). This affects PCB layout - PAP requires thermal connection to internal/ground planes, whereas PJD may use top-side heatsinking. Both packages have identical θJA (21.47°C/W) when implemented per TI's layout recommendations.
TPS23841PAP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 64-PowerTQFP
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Controller (PSE)
- Number of Channels:
- 4
- Power - Max:
- 25 W
- Internal Switch(s):
- Yes
- Auxiliary Sense:
- No
- Standards:
- 802.3af (PoE)
- Voltage - Supply:
- 21.5V ~ 57V
- Current - Supply:
- 10mA
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-HTQFP (10x10)
TPS23841PAP FAQ
1.How can I place an order for TPS23841PAP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS23841PAP 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 TPS23841PAP reliable?
The price and inventory of TPS23841PAP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS23841PAP is usually 5 days.
3.What payment methods are accepted for TPS23841PAP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS23841PAP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS23841PAP?
TPS23841PAP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS23841PAP 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 TPS23841PAP?
For technical support, including TPS23841PAP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS23841PAP requirements.
6.How does Aetrix verify that TPS23841PAP is sourced from the original manufacturer or authorized distributors?
All TPS23841PAP 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 TPS23841PAP meets industry standards.
7.What is the process for return or replacement of TPS23841PAP?
All TPS23841PAP units undergo pre-shipment inspection (PSI). If there is an issue with TPS23841PAP, 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 TPS23841PAP part is unused and in its original packaging.
Return procedure for TPS23841PAP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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