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Texas Instruments TPS2384APJDR
- Part No.:
- TPS2384APJDR
- Manufacturer:
- Texas Instruments
- Category:
- Power Over Ethernet (PoE) Controllers
- Package:
- -
- Datasheet:
-
TPS2384APJDR.pdf
- Description:
- ANALG VOLT REF & OTHER
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Product details
Overview
TPS2384APJDR 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, 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 Ethernet switch mid-span and injector applications.
For engineers reviewing the TPS2384APJDR datasheet, TPS2384APJDR pinout, TPS2384APJDR application, or TPS2384APJDR equivalent, this device delivers precise PoE port control with integrated current ramping, AC/DC disconnect, overtemperature protection, and high-speed 400-kHz I²C interface - critical for robust, scalable Power-over-Ethernet infrastructure design.
Technical Context
The TPS2384APJDR implements a fully integrated PSE front-end with proprietary 15-bit integrating A/D converters per port, optimized for 60-Hz noise rejection during discovery and classification. Its internal 10-V, 6.3-V, and 3.3-V analog/digital supplies are generated from the 48-V rail, each with dedicated bypassing requirements and ground separation (AG1, AG2, DG, RG) to maintain measurement accuracy under EMI stress.
It supports three operational modes: autonomous auto mode (no MCU), semi-auto mode (I²C read-only status + limited control), and full power management mode (full register-based control via I²C), enabling legacy PD detection, AC disconnect using dual totem-pole outputs (AC_HI/AC_LO), and real-time parametric monitoring of all four ports.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IEEE Standard | Compliant with IEEE 802.3af for PoE PSE operation - ensures interoperability with Class 0–4 PDs. |
| Input Voltage Range | 44 V to 57 V on V48 pin - accommodates standard PoE mid-span and switch supply tolerances. |
| Port Count | Quad-port (4 independent channels) - enables single-chip management of up to four Ethernet links. |
| A/D Resolution | 15-bit integrating converter per port - provides high-precision measurement of port resistance, current, voltage, and die temperature. |
| I²C Interface Speed | Up to 400 kHz - supports fast configuration and real-time telemetry in multi-device systems. |
| Operating Temperature | –40°C to +125°C junction - qualified for industrial and enterprise networking environments. |
| Internal Supplies | 10-V (V10), 6.3-V (V6.3), 3.3-V (V3.3), and 2.5-V (V2.5) regulated outputs - eliminate need for external LDOs for biasing. |
| Thermal Resistance | RθJA = 30.1°C/W (PJD package) - requires thermal-aware PCB layout with PowerPAD™ soldered to ground plane. |
Pinout & Package
TPS2384APJDR is housed in a 64-pin HTQFP package with PowerPAD™ up (PJD) thermal construction (10.0 mm × 10.0 mm body), requiring exposed pad soldering to PCB ground for thermal performance and noise immunity. Pin functions are validated per TI SLUS634F Rev F (Jan 2022).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V48 | Primary power input | Accepts 44–57 V PoE supply; must be decoupled with 0.1-μF capacitor to AG1 near the pin. |
| P1–P4 / N1–N4 | Port high-side/low-side terminals | Direct connection to Ethernet pairs; internal FETs and current sensing eliminate external components per port. |
| CINT1–CINT4 | Analog integration capacitor node | Connects to precision low-leakage 0.027-μF capacitor to RG - sets A/D conversion accuracy and noise rejection. |
| SCL / SDA_I / SDA_O | I²C interface | 400-kHz bidirectional bus; SDA_O is open-drain for opto-isolation; SDA_I/SDA_O tied externally for standard SDA line. |
| AC_HI / AC_LO | AC disconnect excitation outputs | Totem-pole drivers for AC-based PD disconnection - enable safe hot-swap without DC interruption. |
| INTB | Interrupt output | Open-drain active-low fault indicator - asserts on any port overcurrent, UV/OV, or thermal event. |
| MS | Mode select | Logic level determines operation: low = auto mode (standalone); high = power management mode (I²C-controlled). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated port switching | Eliminates two external components (FET + sense resistor) per port - reduces BOM count and board area by 8 devices. |
| Controlled current ramp | Soft-start limits inrush into PD bulk capacitance and suppresses EMI - avoids false fault triggering during power-up. |
| Dual disconnect methods | Supports both DC disconnect (port shutdown) and AC disconnect (high-frequency signal injection) - meets IEEE 802.3af safety requirements. |
| Legacy PD detection | Identifies non-802.3af-compliant powered devices using current-limited signature detection - extends compatibility to older VoIP phones and cameras. |
| Watchdog timers | I²C clock and oscillator watchdogs prevent lockup in auto/power management modes - ensures fail-safe port disable on communication loss. |
| Thermal protection | Overtemperature shutdown at 125°C junction - prevents damage during sustained overload or poor heatsinking. |
Applications
| Enterprise Ethernet Switches | Mid-Span PoE Injectors |
|---|---|
|
Use Scenario: 24- or 48-port managed switches delivering PoE to IP phones, wireless APs, and security cameras. IC Role / Device Role / Timing Role: Quad-port PSE controller managing up to four concurrent PoE links per TPS2384APJDR; handles discovery, classification, power delivery, and fault recovery autonomously or via host MCU. Use Value: Enables compact, thermally efficient multi-port PoE designs with integrated A/D telemetry - reducing reliance on external microcontrollers and discrete sensing. |
Use Scenario: Standalone inline injectors adding PoE capability between legacy switches and PoE-capable endpoints. IC Role / Device Role / Timing Role: Self-contained PSE front-end performing IEEE 802.3af-compliant power negotiation and delivery without host processor intervention in auto mode. Use Value: Eliminates need for external FETs, current sense resistors, and ADCs - cuts bill-of-materials cost and simplifies compliance testing. |
| SOHO Hubs & Routers | PoE Network Extenders |
|
Use Scenario: Small-office/home-office routers with built-in PoE for powering VoIP handsets or IoT sensors. IC Role / Device Role / Timing Role: Low-pin-count, thermally robust PSE managing up to four ports with integrated 3.3-V logic supply for local MCU interfacing. Use Value: Supports compact form factors with minimal external support circuitry - ideal for space-constrained embedded PoE designs. |
Use Scenario: Long-reach Ethernet extenders delivering PoE over >100 m CAT5 cable with enhanced surge tolerance. IC Role / Device Role / Timing Role: High-voltage-tolerant PSE (survives 100-V transients) with precise port current/voltage monitoring for remote fault diagnostics. Use Value: Provides real-time parametric feedback (via I²C) for predictive maintenance and remote port health monitoring. |
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 |
|---|---|---|---|
| TPS23861RSHR | Single-port, 32-pin WQFN; lower thermal resistance (RθJA = 22.9°C/W); supports IEEE 802.3at Type 2 (30 W/port). | Targeted at modular, scalable PSE designs where port density and per-port power budget exceed TPS2384APJDR's 15.4 W/port limit. | Select when higher per-port power, smaller footprint, or incremental port expansion is required over quad-integrated architecture. |
| MAX5984AEUI+ | Quad-port, 32-pin TQFN; integrates 10/100-Mbps Ethernet PHY; supports 802.3af/at; lacks internal 15-bit A/D per port (uses 12-bit shared ADC). | Used in highly integrated PoE+ switches with embedded MAC/PHY; trades measurement resolution for PHY co-location and reduced system latency. | Choose when Ethernet PHY integration and faster link establishment outweigh need for ultra-precise per-port A/D telemetry. |
Compared with TPS2384APJDR, TPS23861RSHR offers higher per-port power and better thermal performance in a smaller package but requires four units for quad-port coverage, increasing layout complexity and total BOM cost. MAX5984AEUI+ reduces component count via PHY integration but sacrifices A/D resolution and flexibility in custom power sequencing - making TPS2384APJDR optimal for high-accuracy, thermally demanding, standalone PSE implementations.
Availability
TPS2384APJDR is available at Aetrix Electronics and suitable for enterprise Ethernet switches, mid-span PoE injectors, SOHO hubs, and network extenders requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for TPS2384APJDR 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 Power-over-Ethernet IC development.
The TPS2384APJDR belongs to TI's Power Sourcing Equipment (PSE) portfolio, designed specifically for IEEE 802.3af-compliant infrastructure equipment requiring high integration, thermal resilience, and precise port-level telemetry in enterprise and industrial networks.
FAQ
What is the primary function of the TPS2384APJDR in a PoE system?
The TPS2384APJDR serves as a quad-port Power Sourcing Equipment (PSE) power manager IC that performs IEEE 802.3af-compliant discovery, classification, and power delivery to Powered Devices (PDs) over Ethernet cabling. It integrates FETs, sense resistors, and 15-bit A/D converters per port - enabling complete PSE functionality without external power-switching components. The TPS2384APJDR supports auto, semi-auto, and full power management modes, making it suitable for both standalone and MCU-controlled PoE infrastructure.
Does the TPS2384APJDR support IEEE 802.3at (PoE+) or only 802.3af?
The TPS2384APJDR is explicitly compliant with IEEE 802.3af (15.4 W per port) and does not support IEEE 802.3at (25.5 W) or 802.3bt. Its classification current limit is specified at 51–100 mA and its port on-resistance is 1.3–1.8 Ω - consistent with 802.3af Class 0–4 power levels. For PoE+ applications, TI recommends alternatives such as the TPS23861RSHR. The TPS2384APJDR datasheet (SLUS634F) confirms 802.3af compliance only, with no mention of higher-power standard support.
How does the TPS2384APJDR handle thermal management in high-density switch designs?
The TPS2384APJDR uses a 64-pin HTQFP package with PowerPAD™ up (PJD) construction, requiring the exposed thermal pad to be soldered directly to a large PCB copper pour tied to AG1/AG2/DG/RG ground planes. Its RθJA is 30.1°C/W (PJD), and internal overtemperature protection shuts down ports above 125°C junction temperature. Layout guidelines in the datasheet emphasize separate analog/digital/reference ground routing and localized 0.1-μF decoupling on V48, V10, V6.3, V3.3, and V2.5 - all critical for maintaining stability and A/D accuracy under thermal stress. The TPS2384APJDR's thermal design enables reliable operation in 48-port chassis with forced-air cooling.
Can the TPS2384APJDR operate without a microcontroller?
Yes, the TPS2384APJDR supports autonomous operation in auto mode (MS pin low), where it sequentially discovers, classifies, and powers up all four ports without external MCU intervention. In this mode, internal state machines manage timing, fault response, and retry logic - including back-off delays after discovery failure (controlled by ALTA/B pin). Semi-auto mode allows I²C read access to status and A/D registers while retaining autonomous power sequencing. Full I²C control (power management mode) is optional, not mandatory. The TPS2384APJDR is engineered for both controller-less and MCU-coordinated deployments.
What are the key differences between the PAP and PJD package variants of the TPS2384?
The TPS2384APJDR uses the PJD (PowerPAD™ up) variant - a 64-pin HTQFP with the thermal pad on the top surface, intended for direct thermal coupling to a heatsink or upper-layer copper. The PAP (PowerPAD™ down) variant places the thermal pad on the bottom and requires soldering to the PCB's inner ground layer. Pin numbering differs between PAP and PJD (e.g., P1 is pin 7 in PAP, pin 58 in PJD), and thermal metrics vary: PJD has RθJA = 30.1°C/W vs. PAP's 23.9°C/W. The TPS2384APJDR orderable part number specifically denotes the PJD package, confirmed in TI's SLUS634F datasheet and packaging addendum.
TPS2384APJDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- -
- Number of Channels:
- -
- Power - Max:
- -
- Internal Switch(s):
- -
- Auxiliary Sense:
- -
- Standards:
- -
- Voltage - Supply:
- -
- Current - Supply:
- -
- Operating Temperature:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
TPS2384APJDR FAQ
1.How can I place an order for TPS2384APJDR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2384APJDR 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 TPS2384APJDR reliable?
The price and inventory of TPS2384APJDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2384APJDR is usually 5 days.
3.What payment methods are accepted for TPS2384APJDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2384APJDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2384APJDR?
TPS2384APJDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2384APJDR 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 TPS2384APJDR?
For technical support, including TPS2384APJDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2384APJDR requirements.
6.How does Aetrix verify that TPS2384APJDR is sourced from the original manufacturer or authorized distributors?
All TPS2384APJDR 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 TPS2384APJDR meets industry standards.
7.What is the process for return or replacement of TPS2384APJDR?
All TPS2384APJDR units undergo pre-shipment inspection (PSI). If there is an issue with TPS2384APJDR, 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 TPS2384APJDR part is unused and in its original packaging.
Return procedure for TPS2384APJDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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