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Texas Instruments TPS2384PAPG4
- Part No.:
- TPS2384PAPG4
- Manufacturer:
- Texas Instruments
- Category:
- Power Over Ethernet (PoE) Controllers
- Package:
- 64-PowerTQFP
- Datasheet:
-
TPS2384PAPG4.pdf
- Description:
- IC POE CNTRL 4 CHANNEL 64HTQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,590
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Product details
Overview
TPS2384PAPG4 from Texas Instruments is a quad-port IEEE 802.3af-compliant Power Sourcing Equipment (PSE) power manager IC with integrated FETs and sense resistors, operating from a single 44–57-V input supply. It features four independent 15-bit A/D converters for port voltage, current, resistance, and die temperature measurement, and supports auto, semi-auto, and power management modes across –40°C to 125°C. It is used in Ethernet mid-spans and PSE injectors to deliver up to 15.4 W per port to compliant Powered Devices.
For engineers reviewing the TPS2384PAPG4 datasheet, TPS2384PAPG4 pinout, TPS2384PAPG4 application, or TPS2384PAPG4 equivalent, key selection considerations include its integrated low-side switching architecture, 400-kHz I²C interface with open-drain SDA_O, AC/DC disconnect capability, 245-kHz internal clock (set via CT/RBIAS), and HTQFP-64 PowerPAD™ package with dual analog/digital ground separation for noise immunity in PoE systems.
Technical Context
The TPS2384PAPG4 implements a fully integrated PSE front-end with on-die 15-bit integrating A/D converters per port-each measuring port resistance (for discovery), classification current/voltage, real-time current (31–40 counts/mA), voltage (335–370 counts/V), and die temperature. Its internal 10-V, 6.3-V, and 3.3-V analog/digital supplies are generated from the 48-V rail, with dedicated AG1, AG2, DG, and RG pins enabling precision grounding and noise isolation.
It supports three functional modes: autonomous auto mode (no MCU required), semi-auto mode (I²C read-only access to status/A/D registers), and full power management mode (full I²C read/write control including legacy detection, AC disconnect via AC_LO/AC_HI outputs, and real-time port supervision). Internal timing-including discovery (18–22 ms), classification (18–22 ms), and overcurrent response (50–75 ms)-is governed by the CT capacitor and RBIAS resistor network.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IEEE Standard | Compliant with IEEE 802.3af (PoE Class 0–4 support) |
| Input Voltage Range | 44 V to 57 V on V48 pin - powers all internal rails and withstands 100-V transients |
| Port Count | 4 independent ports with integrated low-side switches and no external sense resistors required |
| A/D Resolution | 15-bit integrating converter per port - rejects 60-Hz line noise for robust discovery/classification |
| I²C Interface | 400-kHz high-speed interface with SDA_I/SDA_O separation - enables opto-isolation for Ethernet port isolation |
| Operating Temperature | –40°C to +125°C junction range - qualified for industrial and enterprise switch environments |
| Internal Clock | 245 kHz (set by 220-pF CT capacitor + 124-kΩ RBIAS) - ensures IEEE 802.3af timing compliance |
Pinout & Package
TPS2384PAPG4 is housed in a 64-pin HTQFP PowerPAD™ down (PAP) package (10.0 mm × 10.0 mm), featuring an exposed thermal pad on the bottom side for enhanced heat dissipation. The package includes separate analog (AG1, AG2, RG), digital (DG), and power (V48) ground domains to minimize noise coupling in PoE applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V48 | Primary power input | 44–57-V supply input; must be decoupled with 0.1-μF capacitor to AG1 - powers all internal regulators and output stages |
| P1–P4 / N1–N4 | Port differential terminals | High-side (P#) and low-side (N#) connections per port - internal FETs switch N#; P# senses port voltage differentially |
| CINT1–CINT4 | Analog integration node | Connects to 0.027-μF polycarbonate capacitor to RG - sets A/D conversion accuracy and noise rejection per port |
| SCL / SDA_I / SDA_O | I²C interface signals | SCL: clock input; SDA_I: data input; SDA_O: open-drain output - allows isolated bus design using optocouplers |
| AC_LO / AC_HI | AC disconnect drivers | Totem-pole outputs (0–5 V / 5–7 V swing) - drive external AC disconnect circuitry for non-PoE-compliant PD detection |
| INTB | Fault indicator | Open-drain active-low interrupt - asserts when any port experiences UV/OV, overtemperature, or overcurrent fault |
Key Features
| Feature | Design Value |
|---|---|
| Integrated low-side switching | Eliminates need for 8 external MOSFETs and 4 sense resistors - reduces BOM count and layout area in quad-port PSE designs |
| Per-port 15-bit A/D conversion | Measures port resistance (discovery), classification current (51–100 mA), real-time current (31–40 counts/mA), and die temperature - enables precise, adaptive power allocation |
| Triple operating mode support | Auto mode (standalone), semi-auto (I²C monitoring), and full PMM (microcontroller-controlled) - provides scalability from simple injectors to managed mid-spans |
| Dedicated ground partitioning | AG1 (V48/V10/V6.3 return), AG2 (ESD substrate), DG (logic), RG (precision reference) - minimizes measurement error and improves EMC performance |
| AC/DC disconnect capability | AC_LO/AC_HI outputs + DC modulated disconnect logic - supports legacy PD detection and safe power removal per IEEE 802.3af Section 14.2.1 |
Applications
| Ethernet Mid-Span PSE | PoE Injector Module |
|---|---|
|
Use Scenario: Inserted between legacy Ethernet switch and PoE-enabled endpoints (IP phones, cameras) to add power delivery without replacing infrastructure. IC Role / Device Role / Timing Role: Quad-port PSE controller managing discovery, classification, and power delivery to up to four endpoints simultaneously - handles all IEEE 802.3af state machines autonomously or under MCU supervision. Use Value: Enables cost-effective retrofit of non-PoE networks with minimal added latency; integrated A/D and timing eliminate external timing components and reduce calibration effort. |
Use Scenario: Compact, single-port or multi-port inline adapter delivering 48 V power and data over Cat5e/Cat6 cable to wireless APs or VoIP phones. IC Role / Device Role / Timing Role: Integrated PSE power manager providing controlled current ramp (reducing EMI), 22-ms A/D conversion, and 300–400-ms disconnect detection - ensuring safe hot-swap and fault recovery. Use Value: Eliminates need for discrete gate drivers, current sense amps, and protection ICs - simplifies thermal design with PowerPAD™ and supports –40°C to 125°C ambient operation. |
| Enterprise Switch PSE Subsystem | Industrial PoE Hub |
|
Use Scenario: Embedded in 24- or 48-port managed Ethernet switches requiring per-port power budgeting, fault logging, and remote reset. IC Role / Device Role / Timing Role: I²C-configurable PSEPM supporting full power management mode - reads real-time port current/voltage (36.41 counts/mA, 353 counts/V), die temp, and status registers for system-level telemetry. Use Value: Enables dynamic power capping and predictive maintenance via accurate 15-bit measurements - supports MSP430-based software stack for centralized PoE control. |
Use Scenario: Ruggedized hub deployed in factory automation or outdoor surveillance where wide temperature range and transient immunity are critical. IC Role / Device Role / Timing Role: Quad-port PSE with 100-V transient survival, overtemperature protection, and –40°C to 125°C operation - manages power to IP cameras, sensors, and edge controllers over extended cable runs. Use Value: Reduces field failure risk through integrated disconnect (AC/DC), watchdog timers, and robust grounding architecture - eliminates external TVS arrays and thermal sensors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Power Sourcing Equipment applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS23861RSLR | Single-port, 32-QFN, supports IEEE 802.3at (PoE+) up to 30 W; lacks integrated CINT/CT timing network | Targeted at space-constrained, higher-power single-port injectors - not scalable to quad-port mid-spans | Select TPS23861RSLR only when PoE+ compliance and smaller footprint outweigh need for multi-port integration and autonomous operation. |
| MAX5980GTJ+ | Quad-port, 48-TQFN, supports 802.3af/at; uses sigma-delta A/D (not integrating); requires external sense resistors | Designed for mixed PoE/PoE+ systems with flexible classification - lacks integrated low-side FETs and PowerPAD™ thermal performance | Choose MAX5980GTJ+ only if dual-standard (af/at) support and TQFN packaging are mandatory, and external sensing is acceptable. |
Compared with TPS2384PAPG4, TPS23861RSLR offers higher per-port power but no multi-port integration or autonomous mode, while MAX5980GTJ+ adds PoE+ compatibility at the cost of external components and reduced thermal efficiency - making TPS2384PAPG4 optimal for cost-sensitive, thermally demanding quad-port 802.3af mid-spans.
Availability
TPS2384PAPG4 is available at Aetrix Electronics and suitable for Ethernet enterprise switches, PoE mid-spans, and industrial PSE injectors requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for TPS2384PAPG4 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 headquartered in Dallas, Texas, specializing in analog, embedded processing, and power management technologies with broad industrial, automotive, and communications reach.
The TPS2384PAPG4 belongs to TI's Power-over-Ethernet (PoE) PSE product line, engineered specifically for IEEE 802.3af-compliant quad-port power management in enterprise and industrial networking equipment.
FAQ
What is the function of the CT and RBIAS pins on the TPS2384PAPG4?
The CT and RBIAS pins set the internal clock frequency of the TPS2384PAPG4: CT connects to a 220-pF capacitor, and RBIAS connects to a 124-kΩ resistor tied to RG. Together they configure a 245-kHz clock that governs A/D conversion timing, discovery/classification cycles, and fault response - ensuring IEEE 802.3af compliance and optimal 60-Hz noise rejection. This eliminates need for external timing crystals or oscillators in the TPS2384PAPG4 design.
Does the TPS2384PAPG4 support legacy (non-802.3af) Powered Devices?
Yes, the TPS2384PAPG4 supports legacy PD detection via dedicated circuitry that applies a 2.6–4.3 mA current limit and measures port voltage with 1365–1445 counts/V resolution. It performs legacy detection before standard discovery, enabling interoperability with older VoIP phones and cameras lacking IEEE 802.3af signature resistors - a capability confirmed in the TPS2384PAPG4 datasheet Section 8.4 and Table 6-5.
How does the TPS2384PAPG4 handle thermal management in high-density PoE systems?
The TPS2384PAPG4 integrates overtemperature protection and uses its PowerPAD™ HTQFP-64 package with an exposed thermal pad to achieve a junction-to-board thermal resistance (RθJB) of 6.9°C/W. Combined with separate AG1/AG2/DG/RG grounds and internal thermal sensing (reported via 17500−counts/16 scaling), it enables reliable operation at 125°C junction temperature - critical for stacked mid-span designs where airflow is limited and multiple TPS2384PAPG4 devices operate in proximity.
Can the TPS2384PAPG4 operate without a microcontroller?
Yes, the TPS2384PAPG4 supports autonomous auto mode when the MS pin is held low, enabling full IEEE 802.3af discovery, classification, and power-up sequencing without any external MCU. In this mode, it sequentially processes all four ports using internal state machines and timing - making the TPS2384PAPG4 ideal for standalone PSE injectors or cost-sensitive mid-spans where firmware development and BOM overhead must be minimized.
What is the purpose of the AC_LO and AC_HI pins on the TPS2384PAPG4?
The AC_LO and AC_HI pins are totem-pole outputs on the TPS2384PAPG4 designed to drive external AC disconnect circuitry - a requirement for detecting non-compliant PDs per IEEE 802.3af Section 14.2.1. AC_LO swings 0–0.5 V (low) / 3.0–5.0 V (high); AC_HI swings 0–0.5 V (low) / 5.0–7.0 V (high), enabling direct interface with transformer-coupled AC test circuits. These pins are inactive in auto mode and require I²C configuration in power management mode.
TPS2384PAPG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 64-PowerTQFP
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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)
TPS2384PAPG4 FAQ
1.How can I place an order for TPS2384PAPG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2384PAPG4 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 TPS2384PAPG4 reliable?
The price and inventory of TPS2384PAPG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2384PAPG4 is usually 5 days.
3.What payment methods are accepted for TPS2384PAPG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2384PAPG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2384PAPG4?
TPS2384PAPG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2384PAPG4 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 TPS2384PAPG4?
For technical support, including TPS2384PAPG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2384PAPG4 requirements.
6.How does Aetrix verify that TPS2384PAPG4 is sourced from the original manufacturer or authorized distributors?
All TPS2384PAPG4 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 TPS2384PAPG4 meets industry standards.
7.What is the process for return or replacement of TPS2384PAPG4?
All TPS2384PAPG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS2384PAPG4, 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 TPS2384PAPG4 part is unused and in its original packaging.
Return procedure for TPS2384PAPG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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