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Texas Instruments TPS2384PJDR
- Part No.:
- TPS2384PJDR
- Manufacturer:
- Texas Instruments
- Category:
- Power Over Ethernet (PoE) Controllers
- Package:
- 64-TQFP Exposed Pad
- Datasheet:
-
TPS2384PJDR.pdf
- Description:
- IC POE CNTRL 4 CHANNEL 64HTQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPS2384PJDR from Texas Instruments is a quad-port IEEE 802.3af-compliant Power Sourcing Equipment (PSE) power manager IC with integrated high-side switches and sense resistors, operating from a single 44–57-V input supply, featuring four independent 15-bit A/D converters for port voltage/current/resistance/die temperature measurement, and supporting auto, semi-auto, and power management modes for PoE mid-span and switch applications.
For engineers reviewing the TPS2384PJDR datasheet, TPS2384PJDR pinout, TPS2384PJDR application, or TPS2384PJDR equivalent, key selection criteria include its 48-V single-supply operation, 400-kHz I²C interface, –40°C to 125°C junction temperature range, integrated DC/AC disconnect capability, and compliance with IEEE 802.3af detection/classification timing and thresholds.
Technical Context
The TPS2384PJDR implements a fully integrated PSE front-end with proprietary 15-bit integrating A/D converters per port, each using CINT/RBIAS/CT timing network for 60-Hz noise rejection and precise current/voltage/resistance measurement during discovery, classification, and powered operation. Its internal 10-V, 6.3-V, and 3.3-V analog/digital supplies are generated from the 48-V rail and externally bypassed for stability.
It supports three functional modes: autonomous auto-mode (MS = low), semi-auto mode (I²C read access + limited control), and full power management mode (MS = high) with microcontroller-driven real-time port control, legacy PD detection, AC disconnect excitation via AC_HI/AC_LO outputs, and comprehensive register-based fault handling including overcurrent, UV/OV, and overtemperature protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IEEE Standard | Compliant with IEEE 802.3af for detection, classification, and power delivery on all four ports. |
| Supply Voltage Range | 44 V to 57 V on V48 pin - enables direct connection to standard PoE mid-span or switch 48-V rails without external regulation. |
| Operating Temperature | –40°C to 125°C junction temperature - supports deployment in industrial Ethernet switches and uncontrolled ambient environments. |
| I²C Interface Speed | Up to 400 kHz - allows fast register read/write for real-time port status monitoring and dynamic power allocation. |
| Port On-Resistance | 1.3 Ω to 1.8 Ω - minimizes conduction loss and thermal rise during 350–450 mA powered operation per port. |
| A/D Resolution | 15-bit integrating converter per port - delivers high-accuracy, noise-immune measurement of port current (31–40 counts/mA), voltage (335–370 counts/V), and resistance for robust PD identification. |
| Discovery Current Limit | 3–5 mA - ensures safe low-power probing of connected devices while meeting IEEE 802.3af Class 0–4 threshold requirements. |
| Classification Current Limit | 51–100 mA - satisfies IEEE 802.3af Class 0–4 current sourcing during classification phase with ±1.5 mA tolerance. |
Pinout & Package
TPS2384PJDR is packaged in a 64-pin HTQFP (PowerPAD™ up, PJD) with 10.0 mm × 10.0 mm body size and exposed thermal pad on bottom for enhanced heat dissipation. Pin functions are validated per TI SLUS634F datasheet Rev. F (Jan 2022).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V48 | 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 | Port positive terminals | High-side 48-V output connections to Ethernet pairs; support self-resetting poly-fuse integration for overcurrent protection. |
| N1–N4 | Port negative terminals | Low-side switched return paths with integrated current limiting and fault sensing - no external sense resistor needed. |
| SCL / SDA_I / SDA_O | I²C interface signals | SCL accepts up to 400 kHz clock; SDA_I/SDA_O support opto-coupled isolation for ground-separated controller interfacing. |
| AC_HI / AC_LO | AC disconnect drivers | Push-pull outputs generating differential AC signal across Ethernet pair to trigger legacy PD AC disconnect behavior. |
| INTB | Interrupt output | Open-drain active-low flag signaling any port fault (overcurrent, UV/OV, thermal, discovery failure) to host controller. |
| MS | Mode select input | Logic level determines operation mode: low = auto-mode (standalone), high = power management mode (I²C-controlled). |
| RBIAS / CT / CINT1–CINT4 | Timing & A/D calibration network | RBIAS (124 kΩ) + CT (220 pF) sets 245-kHz internal clock; CINT (0.027 μF) per port enables precision integrating A/D conversion. |
Key Features
| Feature | Design Value |
|---|---|
| Quad-port integration | Eliminates eight external components (four FETs + four sense resistors) per design, reducing BOM count and PCB area in 4-port PoE systems. |
| 15-bit per-port A/D | Enables simultaneous, high-resolution measurement of port resistance, voltage, current, and die temperature - critical for accurate PD classification and thermal derating. |
| Controlled current ramp | Reduces EMI during power-up and limits inrush into PD bulk capacitance, preventing false disconnects and improving system reliability. |
| DC & AC disconnect | Supports both IEEE 802.3af DC disconnect (via current limit) and legacy AC disconnect (via AC_HI/AC_LO outputs) for backward compatibility with older PDs. |
| I²C watchdog timers | Monitors SCL activity and internal oscillator to detect communication lockup or firmware hang - automatically resets port state if timeout occurs. |
| –40°C to 125°C operation | Validated across full junction temperature range - enables use in fanless enterprise switches, outdoor mid-spans, and industrial Ethernet infrastructure. |
Applications
| Ethernet Enterprise Switch | Ethernet Mid-Span Injector |
|---|---|
|
Use Scenario: 24- or 48-port managed switch delivering PoE to IP phones, wireless APs, and security cameras. IC Role / Device Role / Timing Role: Quad-port PSE power manager controlling four independent PoE channels per TPS2384PJDR, performing IEEE 802.3af discovery/classification and real-time current/voltage monitoring. Use Value: Enables compact, thermally efficient multi-port PoE implementation with deterministic fault response and minimal external component count. |
Use Scenario: Standalone 4-port PoE injector adding power to existing data-only Ethernet links between switch and endpoint devices. IC Role / Device Role / Timing Role: Autonomous PSE controller executing full discovery-classify-power-on sequence per port without microcontroller, leveraging auto-mode (MS = low) and internal POR sequencing. Use Value: Reduces bill-of-materials and firmware development effort while maintaining full IEEE 802.3af compliance and thermal safety margins. |
| SOHO Network Hub | PoE Lighting Controller |
|
Use Scenario: Small-office/home-office hub powering VoIP phones and IoT sensors over Cat5e cabling. IC Role / Device Role / Timing Role: Semi-auto mode PSE managing up to four low-power endpoints with I²C read access to port status registers and A/D values for basic power budgeting. Use Value: Provides visibility into connected device identity and real-time power draw without requiring full microcontroller integration. |
Use Scenario: Smart LED lighting node receiving both data and power over Ethernet for tunable white or RGBW fixtures. IC Role / Device Role / Timing Role: Precision current-sensing PSE ensuring stable 350–450 mA delivery per port with overtemperature shutdown and UV/OV protection during dimming transients. Use Value: Guarantees safe, standards-compliant power delivery to sensitive LED drivers while enabling remote fault diagnostics via I²C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Power Sourcing Equipment applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS23861RSHR | Single-port IEEE 802.3at/af-compliant PSE with integrated FETs; supports higher 60-W Class 4 power and 1-MHz I²C. | Designed for high-power single-port applications (e.g., PTZ cameras); lacks quad-port integration and auto-mode standalone operation. | Select when higher per-port power (≤60 W) and PoE+ compliance are required, and system architecture uses one IC per port. |
| MAX5984AEUI+ | Quad-port IEEE 802.3af PSE with integrated FETs and 12-bit A/D; operates from 36–57 V; supports hot-swap sequencing. | Offers lower A/D resolution and no AC disconnect outputs; uses SPI instead of I²C; rated for –40°C to 85°C only. | Choose for cost-sensitive, temperature-moderate designs where SPI interface and reduced feature set are acceptable trade-offs. |
Compared with TPS2384PJDR, TPS23861RSHR provides higher per-port power but requires four instances for quad functionality and lacks autonomous operation, while MAX5984AEUI+ offers quad integration at lower resolution, narrower temperature range, and SPI-only control - making TPS2384PJDR optimal for thermally demanding, I²C-based, fully featured quad-PoE systems.
Availability
TPS2384PJDR is available at Aetrix Electronics and suitable for Ethernet enterprise switches, PoE mid-span injectors, and SOHO hubs requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing for industrial-grade deployments.
Supply support for TPS2384PJDR 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, embedded processing, and power management technologies, with leadership in industrial, automotive, and communications infrastructure markets.
The TPS2384PJDR belongs to TI's Power-over-Ethernet (PoE) PSE product line, engineered specifically for IEEE 802.3af-compliant quad-port power sourcing in enterprise and industrial Ethernet infrastructure equipment.
FAQ
What is the package type and thermal pad configuration of the TPS2384PJDR?
The TPS2384PJDR uses a 64-pin HTQFP package with PowerPAD™ up (PJD) construction, featuring an exposed thermal pad on the bottom surface. This pad must be soldered to a large copper pour on the PCB for effective heat dissipation, especially under full 4-port 350-mA loading conditions where junction temperature can approach 125°C. Thermal metrics show RθJB = 7.4°C/W, confirming the necessity of proper board-level thermal design.
Does the TPS2384PJDR support IEEE 802.3at (PoE+) or only 802.3af?
The TPS2384PJDR is explicitly designed and tested for IEEE 802.3af compliance only. It supports Class 0–4 power levels up to 15.4 W per port but does not meet the higher current (600 mA), voltage (57 V), or signature detection requirements of IEEE 802.3at. Its overcurrent threshold is fixed at 350–450 mA, and classification current limit is capped at 100 mA - both below PoE+ specifications. For PoE+, consider TI's TPS23861 or TPS2372 series.
How does the TPS2384PJDR handle legacy (non-802.3af) powered devices?
The TPS2384PJDR supports legacy PD detection through dedicated circuitry that applies a 2.6–4.3 mA current limit and measures port voltage with 1365–1445 counts/V scaling. When enabled via software control in power management mode, it identifies non-compliant devices by detecting valid resistance signatures (e.g., 25 kΩ) and initiates DC disconnect upon sustained overcurrent. Legacy detection requires MS = high and I²C configuration - it is not active in auto-mode.
What is the function of the AC_HI and AC_LO pins on the TPS2384PJDR?
The AC_HI and AC_LO pins on the TPS2384PJDR generate a differential AC signal (typically 10–20 Vpp at 1–10 kHz) across the Ethernet pair to trigger AC disconnect in legacy PDs that lack IEEE 802.3af-compliant DC disconnect circuitry. These are push-pull outputs capable of driving up to 50 mA each, and their activation is controlled exclusively via I²C register writes in power management mode - they remain inactive in auto or semi-auto modes.
Can the TPS2384PJDR operate without an external microcontroller?
Yes, the TPS2384PJDR supports fully autonomous operation in auto-mode (MS pin held low), where it sequentially executes discovery, classification, and power-on for all four ports without any I²C interaction. Internal state machines and POR sequencing ensure safe startup and fault recovery. However, features like legacy detection, AC disconnect, real-time A/D register reads, and custom power sequencing require a microcontroller and power management mode (MS = high).
TPS2384PJDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 64-TQFP Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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)
TPS2384PJDR FAQ
1.How can I place an order for TPS2384PJDR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2384PJDR 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 TPS2384PJDR reliable?
The price and inventory of TPS2384PJDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2384PJDR is usually 5 days.
3.What payment methods are accepted for TPS2384PJDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2384PJDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2384PJDR?
TPS2384PJDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2384PJDR 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 TPS2384PJDR?
For technical support, including TPS2384PJDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2384PJDR requirements.
6.How does Aetrix verify that TPS2384PJDR is sourced from the original manufacturer or authorized distributors?
All TPS2384PJDR 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 TPS2384PJDR meets industry standards.
7.What is the process for return or replacement of TPS2384PJDR?
All TPS2384PJDR units undergo pre-shipment inspection (PSI). If there is an issue with TPS2384PJDR, 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 TPS2384PJDR part is unused and in its original packaging.
Return procedure for TPS2384PJDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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