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Texas Instruments TPS2384PJD
- Part No.:
- TPS2384PJD
- Manufacturer:
- Texas Instruments
- Category:
- Power Over Ethernet (PoE) Controllers
- Package:
- 64-TQFP Exposed Pad
- Datasheet:
-
TPS2384PJD.pdf
- Description:
- IC POE CNTRL 4 CHANNEL 64HTQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,300
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Product details
Overview
TPS2384PJD from Texas Instruments is a quad-port IEEE 802.3af-compliant Power Sourcing Equipment (PSE) power manager with integrated FETs and sense resistors, operating from a single 44–57-V input supply, featuring four 15-bit A/D converters for port voltage/current/resistance/die temperature measurement, and supporting auto, semi-auto, and power management modes for Ethernet PoE midspans and enterprise switches.
For engineers reviewing the TPS2384PJD datasheet, TPS2384PJD pinout, TPS2384PJD application, or TPS2384PJD equivalent, this device delivers robust, isolated, real-time per-port monitoring and control in high-density PoE systems requiring precise classification, legacy detection, AC/DC disconnect, and thermal-safe operation across –40°C to 125°C.
Technical Context
The TPS2384PJD implements a fully integrated PSE front-end with internal 48-V-to-10-V/6.3-V/3.3-V regulation, eliminating external LDOs and enabling direct connection to CAT5 cabling. Its proprietary 15-bit integrating A/D converter uses CINT-based charge integration with CT/RBIAS-timed internal clock (245 kHz typical) to reject 60-Hz line noise during discovery and classification.
It supports three functional modes: autonomous auto-mode (no MCU), semi-auto mode (I2C read-only status + limited control), and full power management mode (full I2C read/write with MSP430 co-processor support). DC and AC disconnect are implemented via dedicated totem-pole AC_LO/AC_HI outputs and controlled current ramping to limit EMI and PD bulk capacitance charging stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IEEE Standard | Compliant to IEEE 802.3af for PoE PSE operation, including discovery, classification, and powered-device handshaking. |
| Input Voltage Range | 44 V to 57 V on V48 pin - supports standard PoE midspan and switch applications with ±10% tolerance. |
| Port Count | Four independent PoE ports with individual A/D, current limiting, UV/OV protection, and thermal monitoring. |
| A/D Resolution | 15-bit integrating ADC per port - enables precise 0.1-mA current and 10-mV voltage resolution for reliable PD classification and fault detection. |
| I²C Interface | 400-kHz high-speed interface with open-drain SDA_O and separate SDA_I - supports opto-isolated microcontroller communication for system-level isolation. |
| Operating Temperature | –40°C to 125°C junction range - qualified for industrial and enterprise networking equipment deployed in uncontrolled thermal environments. |
| Package | 64-pin HTQFP (10.0 mm × 10.0 mm) with PowerPAD™ up (PJD) thermal pad - optimized for high-power dissipation and PCB heat spreading. |
Pinout & Package
The TPS2384PJD is housed in a 64-pin HTQFP package with exposed thermal pad (PowerPAD™ up configuration), designed for low thermal resistance (RθJA = 30.1°C/W with heatsink) and compatibility with standard PCB assembly processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V48 (Pin 5) | Primary power input | Accepts 44–57 V PoE supply; requires local 0.1-μF decoupling to AG1 for stable operation under transient load. |
| P1–P4 (Pins 58,55,26,23) | Port positive terminals | High-side 48-V output connections to Ethernet pairs; each integrates MOSFET switch and current sensing. |
| N1–N4 (Pins 59,54,27,22) | Port negative terminals | Low-side return paths with internal current limiting and disconnect logic - no external sense resistor needed. |
| SCL/SDA_I/SDA_O (Pins 40,39,38) | I²C interface | Supports 400-kHz bidirectional communication; SDA_O is open-drain for opto-coupler interfacing; SDA_I allows clean input separation. |
| AC_LO / AC_HI (Pins 14,15) | AC disconnect drivers | Totem-pole outputs generating differential AC signal (±5 V typical) to trigger legacy PD AC disconnect without external circuitry. |
| INTB (Pin 45) | Fault interrupt output | Open-drain active-low signal asserting on any port overcurrent, UV/OV, thermal, or classification failure - enables system-level fault prioritization. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated port switching | Eliminates two external components per port (MOSFET + sense resistor), reducing BOM count and layout area while surviving 100-V transients. |
| Per-port 15-bit A/D | Measures port resistance, voltage, current, and die temperature simultaneously - enables real-time power budgeting and dynamic load balancing. |
| Controlled current ramp | Soft-start limits inrush into PD bulk capacitance and reduces EMI generation during power-up - critical for meeting FCC Class B emissions. |
| Triple operating modes | Auto mode enables standalone deployment; semi-auto adds I²C visibility; PMM enables full software-defined power policy control with MCU coordination. |
| AC & DC disconnect | Dedicated AC_LO/AC_HI outputs and DC modulated disconnect logic ensure compliance with IEEE 802.3af safety requirements for both legacy and modern PDs. |
Applications
| Ethernet Mid-Span Injector | Enterprise Layer-2 Switch |
|---|---|
Use Scenario: Adds PoE capability to non-PoE Ethernet switches by injecting power onto spare or data pairs of CAT5 cables up to 100 m. IC Role / Device Role / Timing Role: Acts as primary PSE controller managing up to four powered devices with full IEEE 802.3af handshake, classification, and fault recovery. Use Value: Enables field-upgradeable PoE infrastructure without replacing core switching hardware - reduces CAPEX and extends legacy network lifespan. | Use Scenario: Integrated into 24- or 48-port managed switches to deliver up to 15.4 W per port to VoIP phones, wireless APs, and IP cameras. IC Role / Device Role / Timing Role: Provides per-port power sequencing, real-time current/voltage telemetry, and thermal-aware power capping across all ports. Use Value: Supports dynamic power budget allocation and IEEE 802.3at/af backward compatibility - improves total system efficiency and prevents overloading of 48-V supply rails. |
| SOHO Network Hub | PoE Lighting Controller |
Use Scenario: Compact desktop or wall-mount hub delivering PoE to 4–8 endpoints in small offices or remote workspaces. IC Role / Device Role / Timing Role: Functions in auto-mode to autonomously detect, classify, and power connected PDs without embedded firmware or host processor. Use Value: Eliminates need for MCU and associated code development - accelerates time-to-market for cost-sensitive consumer-grade PoE products. | Use Scenario: Powers and monitors LED luminaires with integrated PoE interfaces in smart building deployments. IC Role / Device Role / Timing Role: Performs continuous port current/voltage monitoring and thermal shutdown to prevent LED driver overheating or cable derating issues. Use Value: Enables predictive maintenance via real-time A/D telemetry and supports DALI-over-PoE bridge functionality using I²C-controlled auxiliary logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PoE PSE power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS23861PWR | Single-port IEEE 802.3at/af-compliant PSE with integrated FETs; smaller 24-pin QFN; lacks quad-port integration and 15-bit A/D per port. | Targeted at space-constrained, lower-port-count designs where per-port intelligence is less critical than density. | Select when scaling down to ≤2 ports or needing simplified thermal design - not suitable for direct replacement in quad-port systems. |
| MAX5984AEUI+ | Quad-port 802.3af PSE with integrated FETs and 12-bit A/D; supports hot-swap sequencing but lacks AC disconnect and has narrower temp range (–40°C to 85°C). | Used in telecom access equipment where AC disconnect is not required and ambient temperature remains moderate. | Choose for cost-sensitive telecom applications with simpler power management needs - verify thermal margin if operating above 85°C. |
Compared with TPS2384PJD, TPS23861PWR offers higher per-port power (30 W vs 15.4 W) but sacrifices multi-port integration and precision telemetry, while MAX5984AEUI+ provides comparable quad-port count but trades off A/D resolution, thermal rating, and AC disconnect capability - making TPS2384PJD optimal for high-reliability, thermally demanding, full-feature PoE infrastructure.
Availability
TPS2384PJD is available at Aetrix Electronics and suitable for Ethernet mid-spans, enterprise switches, SOHO hubs, and PoE lighting controllers requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for TPS2384PJD 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 and PoE solutions.
The TPS2384 product line was engineered specifically for high-density, thermally robust Power Sourcing Equipment in enterprise and industrial networking - emphasizing integrated protection, precision telemetry, and IEEE 802.3af compliance without external complexity.
FAQ
What is the maximum number of powered devices the TPS2384PJD can manage simultaneously?
The TPS2384PJD manages exactly four powered devices (PDs) concurrently, with dedicated circuitry per port including independent A/D converters, current limiting, UV/OV comparators, and thermal monitoring. Each port supports full IEEE 802.3af discovery, classification, and power delivery - no time-sharing or multiplexing is used. This fixed quad-port architecture ensures deterministic timing and consistent performance across all connected PDs in the TPS2384PJD system.
Does the TPS2384PJD require an external microcontroller to operate?
No, the TPS2384PJD supports autonomous operation in auto mode, where it performs discovery, classification, and power-on sequencing without any external microcontroller. The MS pin configures this behavior: pulled low for standalone use, high for power management mode with I²C control. While a microcontroller (e.g., MSP430) unlocks advanced features like AC disconnect and legacy PD detection, the TPS2384PJD functions fully as a self-contained PSE - making it ideal for cost-sensitive or firmware-free deployments.
How does the TPS2384PJD handle thermal protection during sustained high-load operation?
The TPS2384PJD incorporates overtemperature protection with automatic port disablement when die temperature exceeds safe thresholds. Its 15-bit A/D continuously measures internal die temperature, feeding real-time data to the control logic. When thermal limits are approached, the device initiates graceful power reduction or port shutdown - preventing latch-up or permanent damage. The PJD package's PowerPAD™ up construction and RθJA of 30.1°C/W (with heatsink) ensure effective heat transfer, and thermal derating curves in the datasheet guide sustained 300-mA-per-port operation within –40°C to 125°C ambient.
Can the TPS2384PJD support both IEEE 802.3af and legacy (non-compliant) powered devices?
Yes, the TPS2384PJD supports both IEEE 802.3af-compliant and legacy PDs. It implements dual detection methods: standardized 2-point resistance measurement for af-compliant devices and constant-current legacy detection (2.6–4.3 mA limit) for older equipment. Classification thresholds (Class 0–4) are programmable via I²C registers, and the device reports detection results through dedicated A/D channels. This dual-mode capability ensures backward compatibility in mixed-device networks without requiring external circuitry - a core feature confirmed in the TPS2384PJD datasheet Section 8.4.
What is the purpose of the CINT1–CINT4 pins on the TPS2384PJD?
The CINT1–CINT4 pins on the TPS2384PJD serve as integration capacitor inputs for the proprietary 15-bit integrating A/D converters - one per port. Each connects to a precision 0.027-μF capacitor tied to RG (reference ground), forming the integrator stage that converts analog port current/voltage signals into digital counts. These capacitors must be low-leakage types (e.g., polycarbonate or polypropylene) to maintain accuracy; leakage directly impacts A/D conversion error. The CINT network enables high-noise-rejection measurements essential for reliable discovery and classification in electrically noisy Ethernet environments - a key differentiator of the TPS2384PJD architecture.
TPS2384PJD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 64-TQFP Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Controller (PSE)
- Number of Channels:
- 4
- Power - Max:
- 15.4 W
- Internal Switch(s):
- Yes
- Auxiliary Sense:
- No
- Standards:
- 802.3af (PoE)
- Voltage - Supply:
- 44V ~ 57V
- Current - Supply:
- 10mA
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-HTQFP (10x10)
TPS2384PJD FAQ
1.How can I place an order for TPS2384PJD through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2384PJD 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 TPS2384PJD reliable?
The price and inventory of TPS2384PJD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2384PJD is usually 5 days.
3.What payment methods are accepted for TPS2384PJD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2384PJD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2384PJD?
TPS2384PJD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2384PJD 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 TPS2384PJD?
For technical support, including TPS2384PJD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2384PJD requirements.
6.How does Aetrix verify that TPS2384PJD is sourced from the original manufacturer or authorized distributors?
All TPS2384PJD 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 TPS2384PJD meets industry standards.
7.What is the process for return or replacement of TPS2384PJD?
All TPS2384PJD units undergo pre-shipment inspection (PSI). If there is an issue with TPS2384PJD, 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 TPS2384PJD part is unused and in its original packaging.
Return procedure for TPS2384PJD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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