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Texas Instruments TPS23841PAPR
- Part No.:
- TPS23841PAPR
- Manufacturer:
- Texas Instruments
- Category:
- Power Over Ethernet (PoE) Controllers
- Package:
- 64-PowerTQFP
- Datasheet:
-
TPS23841PAPR.pdf
- Description:
- IC POE CNTRL 4 CHANNEL 64HTQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,266
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Product details
Overview
TPS23841PAPR 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 midspans.
For engineers reviewing the TPS23841PAPR datasheet, TPS23841PAPR pinout, TPS23841PAPR application, or TPS23841PAPR equivalent, key selection considerations include its wide-input-voltage operation (21.5–57 V), integrated low-side switching per port, 400-kHz I²C interface with 31-address capability, thermal protection up to +125°C junction, and support for legacy PD detection and AC disconnect functionality.
Technical Context
The TPS23841PAPR implements a fully autonomous PSE state machine with three operational modes: auto mode (MS = 0) for standalone IEEE 802.3af discovery/classification/power delivery; semi-auto mode enabling I²C read access to all status and A/D registers while retaining autonomous detection; and power management mode (MS = 1) for full register-based control including legacy PD detection, AC disconnect, and real-time port-level current/voltage regulation.
Its analog front end uses a proprietary 15-bit integrating A/D converter optimized for 60-Hz noise rejection, measuring port signature resistance, classification current, powered-mode current (20–300 mA range), port voltage (45–56 V), and die temperature - all with dedicated per-port conversion scaling factors and timing (18–22 ms per measurement).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 21.5 V to 57 V - supports wide-range PoE PSE supplies including 48-V nominal and high-headroom industrial rails. |
| Per-Port Current Limit | 650 mA nominal (ILIM) - enables up to 25 W per port at PD input under IEEE 802.3af Class 4 compliance. |
| I²C Interface Speed | 400 kHz - allows fast host communication for real-time power management without bus contention. |
| Operating Temperature | –40°C to +125°C junction - validated for industrial and telecom equipment deployed in uncontrolled environments. |
| A/D Resolution | 15-bit per port - delivers high-precision measurements of port current (36.41 counts/mA), voltage (353 counts/V), and temperature (linear 17500−counts/16 mapping). |
| Package Thermal Resistance | θJA = 21.47°C/W (PAP package) - enables high-power operation with standard 2-oz copper PCB layout per TI SLMA002 guidelines. |
| UVLO Threshold | 21.5 V rising, 21 V falling - ensures reliable startup and brownout recovery across variable input conditions. |
Pinout & Package
TPS23841PAPR is housed in a 64-pin TQFP PowerPAD™ down (PAP) package with exposed thermal pad on underside for enhanced heat dissipation. Pin numbering follows standard TI TQFP orientation with Pin 1 marked by laser dot; thermal pad must be soldered to PCB ground plane per TI SLMA002 layout guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V48 (Pin 60) | Main power input | Accepts 21.5–57 V supply; requires local 0.1-µF decoupling to AG1 for stable internal bias generation. |
| P1–P4 (Pins 7,10,39,42) | Port positive terminals | High-side 48-V sense inputs; each paired differentially with corresponding N pin for accurate load monitoring. |
| N1–N4 (Pins 6,11,38,43) | Port negative terminals | Low-side switched outputs; integrate MOSFET and current sensing - no external sense resistor required. |
| SCL/SDA_I/SDA_O (Pins 25,26,27) | I²C interface | Open-drain SDA_O supports opto-isolation; SDA_I/SDA_O tied externally forms standard bidirectional SDA line. |
| MS (Pin 63) | Mode select | Pull-low enables auto mode; pull-high enables full register-based power management via I²C. |
| INTB (Pin 20) | Fault indicator | Active-low open-drain output asserts when any port experiences UV/OV, overcurrent, DC disconnect, or thermal fault. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated low-side power switch per port | Eliminates two external components (MOSFET + sense resistor) per port and withstands 100-V transients. |
| Four independent 15-bit A/D converters | Enables simultaneous real-time measurement of port voltage, current, signature resistance, and die temperature without multiplexing delay. |
| Controlled current ramp during power-up/down | Reduces EMI and inrush stress on PD cabling and magnetics by limiting di/dt during port enable/disable transitions. |
| Three operational modes (AM/SAM/PMM) | Supports controller-less deployment (AM), hybrid monitoring (SAM), or full firmware-defined power policy (PMM) - all using same hardware. |
| AC disconnect excitation outputs (AC_LO/AC_HI) | Provides dedicated totem-pole drivers for implementing IEEE 802.3af AC disconnect detection with external bridge circuitry. |
Applications
| Enterprise Ethernet Switches | Industrial PoE Mid-Spans |
|---|---|
|
Use Scenario: 24-port managed switch powering VoIP phones, wireless APs, and IP cameras across CAT5e/6 cabling up to 100 m. IC Role / Device Role / Timing Role: Quad-port PSE manager handling four concurrent PoE ports with autonomous discovery, classification, and fault management. Use Value: Enables compact 4-port per-chip architecture with integrated current sensing and 15-bit A/D - reducing BOM count and improving per-port power accuracy vs. discrete solutions. |
Use Scenario: DIN-rail mounted mid-span injector adding PoE capability to legacy non-PoE network switches in factory automation systems. IC Role / Device Role / Timing Role: Standalone PSE controller operating in auto mode to deliver up to 25 W per port without microcontroller intervention. Use Value: Wide 21.5–57 V input range accommodates industrial 24-V and 48-V DC supplies; –40°C to +125°C rating ensures reliability in harsh environments. |
| Medical Imaging Equipment | SOHO Hubs & Network Extenders |
|
Use Scenario: Ultrasound or MRI console with integrated PoE-powered peripherals (e.g., touch displays, sensors) requiring strict EMI control and thermal safety. IC Role / Device Role / Timing Role: PSE manager executing controlled current ramp during power-up/down to minimize conducted emissions into sensitive analog subsystems. Use Value: Integrated EMI-reducing ramp logic and 15-bit noise-immune A/D eliminate need for external filtering or calibration - simplifying medical-grade design validation. |
Use Scenario: Compact 4-port desktop hub for home offices connecting IP phones, security cameras, and smart lighting nodes. IC Role / Device Role / Timing Role: Low-cost quad-port PSE operating in semi-auto mode to allow host MCU monitoring of port status and power consumption via I²C. Use Value: 31 configurable I²C addresses (A1–A5) enable daisy-chained multi-chip configurations without address conflict - ideal for scalable small-form-factor designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Power Sourcing Equipment 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 21.5–57 V input - lacks quad-port integration and shared internal supplies. | Used where board space permits discrete per-port control or incremental system expansion is preferred over monolithic quad integration. | Select TPS23861PWR when modularity, lower per-port cost, or staggered port enablement is prioritized over channel density and shared bias efficiency. |
| MAX5984AEUI+ | Quad-port PSE manager with 12-bit A/D resolution, 100-mA max per-port current limit, and 36–57 V input range - no AC disconnect support or legacy PD detection. | Targeted at cost-sensitive SOHO hubs where full IEEE 802.3af Class 4 (25 W) capability and AC disconnect are not required. | Select MAX5984AEUI+ only for applications strictly limited to Class 0–3 PDs (≤15.4 W) and lacking requirements for AC disconnect or legacy device compatibility. |
Compared with TPS23841PAPR, TPS23861PWR offers port-level flexibility but increases component count and PCB area for quad-channel systems, while MAX5984AEUI+ reduces feature set and power capability to meet lower-tier PoE requirements - making TPS23841PAPR the optimal choice for high-density, high-power, standards-compliant PSE designs.
Availability
TPS23841PAPR is available at Aetrix Electronics and suitable for enterprise Ethernet switches, industrial PoE mid-spans, and medical imaging equipment requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for production programs.
Supply support for TPS23841PAPR 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 technologies, with decades of leadership in power management and industrial communications ICs.
The TPS23841PAPR belongs to TI's Power over Ethernet (PoE) PSE controller product line, designed specifically to simplify implementation of IEEE 802.3af-compliant quad-port power sourcing in enterprise networking, industrial infrastructure, and medical equipment.
FAQ
What is the maximum continuous current per port supported by the TPS23841PAPR?
The TPS23841PAPR supports a nominal output current limit (ILIM) of 650 mA per port, with typical operation up to 570 mA under full-load conditions across the –40°C to +125°C junction temperature range. This enables compliant delivery of up to 25 W at the PD input when operating within IEEE 802.3af Class 4 specifications. The device also features an overcurrent threshold (ICUT) of 615 mA and short-circuit timeout of 50–75 ms for robust fault protection.
Does the TPS23841PAPR require an external microcontroller to operate?
No, the TPS23841PAPR supports autonomous operation in auto mode (MS pin pulled low), performing full IEEE 802.3af discovery, classification, and power delivery without any microcontroller. It also offers semi-auto mode for I²C monitoring and power management mode (MS high) for full register-based control - giving designers flexibility to deploy TPS23841PAPR in both controller-less and MCU-integrated systems.
How does the TPS23841PAPR handle legacy (non-IEEE) Powered Devices?
The TPS23841PAPR supports legacy PD detection in power management mode (PMM) via programmable current-limited probing. It applies a controlled 2.6–4.3 mA current to detect valid signature resistances outside IEEE 802.3af ranges, enabling interoperability with older PoE devices that lack standardized classification circuitry - a capability not available in auto or semi-auto modes.
What thermal performance can be expected from the TPS23841PAPR in its PAP package?
In the 64-pin TQFP PowerPAD™ down (PAP) package, the TPS23841PAPR achieves a junction-to-ambient thermal resistance (θJA) of 21.47°C/W when implemented per TI's SLMA002 layout guidelines - using 2-oz copper traces and direct thermal pad soldering to a large ground plane. This allows sustained operation at full 4-port load in ambient temperatures up to +85°C with appropriate airflow or heatsinking.
Can the TPS23841PAPR be used in systems requiring AC disconnect functionality?
Yes, the TPS23841PAPR provides dedicated AC_LO and AC_HI totem-pole outputs (Pins 51 and 50) designed to drive external bridge circuitry for IEEE 802.3af AC disconnect detection. These pins deliver precise timing-controlled excitation signals synchronized with internal A/D sampling, enabling reliable identification of disconnected PDs while maintaining compliance with the standard's 100-ms detection window.
TPS23841PAPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 64-PowerTQFP
- Packaging:
- Tape & Reel (TR)
- 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)
TPS23841PAPR FAQ
1.How can I place an order for TPS23841PAPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS23841PAPR 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 TPS23841PAPR reliable?
The price and inventory of TPS23841PAPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS23841PAPR is usually 5 days.
3.What payment methods are accepted for TPS23841PAPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS23841PAPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS23841PAPR?
TPS23841PAPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS23841PAPR 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 TPS23841PAPR?
For technical support, including TPS23841PAPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS23841PAPR requirements.
6.How does Aetrix verify that TPS23841PAPR is sourced from the original manufacturer or authorized distributors?
All TPS23841PAPR 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 TPS23841PAPR meets industry standards.
7.What is the process for return or replacement of TPS23841PAPR?
All TPS23841PAPR units undergo pre-shipment inspection (PSI). If there is an issue with TPS23841PAPR, 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 TPS23841PAPR part is unused and in its original packaging.
Return procedure for TPS23841PAPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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