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Texas Instruments TPS2384APAP
- Part No.:
- TPS2384APAP
- Manufacturer:
- Texas Instruments
- Category:
- Power Over Ethernet (PoE) Controllers
- Package:
- 64-PowerTQFP
- Datasheet:
-
TPS2384APAP.pdf
- Description:
- IC POE CNTRL 4 CHANNEL 64HTQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,962
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Product details
Overview
TPS2384APAP 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 15-bit A/D converters for port resistance/voltage/current/die temperature measurement, and supporting auto/semi-auto/power management modes for PoE midspans and enterprise switches.
For engineers reviewing the TPS2384APAP datasheet, TPS2384APAP pinout, TPS2384APAP application, or TPS2384APAP equivalent, key selection considerations include its 64-pin HTQFP PowerPAD™ package, 400-kHz I²C interface, –40°C to 125°C operating range, integrated DC/AC disconnect capability, and per-port overcurrent/UV/OV fault protection with 300–400 ms disconnect detection timing.
Technical Context
The TPS2384APAP implements a fully integrated PSE front-end with on-chip high-side switching FETs and current-sense circuitry per port, eliminating external sense resistors and discrete MOSFETs. Its proprietary 15-bit integrating A/D converter uses CINT-based charge integration with CT/RBIAS-timed internal clock (245 kHz typical) to achieve high noise immunity against 60-Hz line interference during discovery and classification.
It supports three operational modes: autonomous auto-mode (MS = low), semi-auto mode (I²C read-only status + limited control), and full power management mode (MS = high) requiring an external microcontroller for legacy PD detection, AC disconnect, and real-time port-level power budgeting via 31 configurable I²C addresses (A1–A5).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IEEE Standard | Compliant with 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 48-V PoE infrastructure with ±10% tolerance and 100-V transient survivability. |
| Operating Temperature | –40°C to 125°C junction temperature - enables deployment in industrial Ethernet switches and uncontrolled ambient environments. |
| I²C Interface Speed | Up to 400 kHz - allows fast register access for real-time port monitoring and dynamic power allocation in multi-port systems. |
| Port Current Sensing | 31–40 counts/mA scale factor - provides high-resolution current measurement for precise overcurrent thresholding (375 mA typical) and load profiling. |
| Discovery Resistance Range | 19 kΩ to 26.5 kΩ acceptance band - ensures reliable detection of IEEE-compliant PD signature resistors while rejecting invalid loads. |
| Classification Accuracy | 15.5–20 V voltage loop control and 51–100 mA current limit - guarantees accurate Class 0–4 identification per IEEE 802.3af Annex 3A. |
Pinout & Package
TPS2384APAP is housed in a 64-pin HTQFP (PowerPAD™ down, PAP) package measuring 10.0 mm × 10.0 mm with exposed thermal pad on underside for enhanced heat dissipation. Pin functions are validated per TI SLUS634F Rev F (Jan 2022) datasheet Figures 5-1 and Table 5-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V48 | Primary power input | Accepts 44–57 V PoE supply; requires local 0.1-μF decoupling to AG1; withstands 100-V transients. |
| P1–P4 / N1–N4 | Port differential sense terminals | High-side (P#) and low-side (N#) connections for 4 independent PoE ports; integrate current limiting and disconnect logic. |
| SCL / SDA_I / SDA_O | I²C interface signals | Supports 400-kHz bidirectional communication; SDA_O is open-drain for opto-isolation compatibility. |
| MS | Mode select input | Logic-low enables autonomous auto-mode; logic-high enables full I²C-controlled power management mode. |
| INTB | Interrupt output | Open-drain active-low signal indicating fault (UV/OV/overtemp/overcurrent) on any port - used for system-level fault reporting. |
| CT / RBIAS / CINT1–CINT4 | Timing and A/D integration | CT+RBIAS sets 245-kHz internal clock; CINTx capacitors enable 15-bit integrating A/D conversion per port with 60-Hz noise rejection. |
Key Features
| Feature | Design Value |
|---|---|
| Quad-port integration | Eliminates 8 external components (4 FETs + 4 sense resistors) per design, reducing BOM count and PCB area in 4-port PoE systems. |
| Controlled current ramp | Soft-start limits inrush current into PD bulk capacitance, reducing EMI and preventing false overcurrent trips during power-up. |
| Dual disconnect support | DC disconnect (via port disable) and AC disconnect (via AC_HI/AC_LO to external transformer) meet IEEE 802.3af Section 7.2.10 requirements. |
| Legacy PD detection | Supports non-802.3af-compliant devices using 2.6–4.3 mA current limit and dedicated legacy A/D path - extends field upgradeability. |
| Thermal protection | Integrated overtemperature shutdown triggers at 125°C junction temperature, latching off all ports until reset via PORB or power cycle. |
Applications
| Enterprise Ethernet Switches | Midspan PoE Injectors |
|---|---|
|
Use Scenario: 24- or 48-port Layer 2/3 managed switch delivering PoE to IP phones, wireless APs, and security cameras. IC Role / Device Role / Timing Role: Primary PSE controller managing up to four concurrent PoE ports per TPS2384APAP, performing real-time current/voltage monitoring and IEEE-compliant handshaking. Use Value: Enables compact, thermally efficient multi-port PSE designs with deterministic 18–22 ms A/D conversion time per parameter and 300–400 ms fault response. |
Use Scenario: Standalone 4-port PoE injector inserted between legacy Ethernet switch and PoE-powered endpoints. IC Role / Device Role / Timing Role: Autonomous PSE manager executing full discovery-classification-power-on sequence without host MCU in auto-mode (MS = low). Use Value: Reduces bill-of-materials and firmware development effort by embedding IEEE 802.3af state machine and 15-bit precision A/D in single IC. |
| SOHO Hubs & Routers | Industrial Ethernet Gateways |
|
Use Scenario: Compact 4–8 port residential gateway providing PoE to VoIP adapters and smart home sensors. IC Role / Device Role / Timing Role: Integrated PSE power manager with 3.3-V logic supply output (V3.3) powering local MCU or level-shifters. Use Value: Delivers regulated 3.3 V @ ≤3 mA for auxiliary logic, eliminating need for external LDO in space-constrained SOHO designs. |
Use Scenario: Ruggedized DIN-rail mounted gateway powering industrial cameras, PLC I/O modules, and wireless mesh nodes in factory settings. IC Role / Device Role / Timing Role: High-reliability PSE controller operating across –40°C to 125°C, with overtemperature protection and 100-V transient tolerance. Use Value: Ensures continuous PoE delivery in harsh thermal environments where commercial-grade PSE ICs would derate or fail. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PoE PSE applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS23861RSHR | Single-port 802.3at/af-compliant PSE with integrated DC disconnect only; no AC disconnect outputs; smaller 32-pin QFN package. | Targeted at space-constrained single-port injectors or embedded systems needing higher 30-W Class 4 support, not quad-port consolidation. | Select when port count is ≤1 and 802.3at compliance or smaller footprint is prioritized over multi-port integration. |
| MAX5984AETL+ | Quad-port 802.3af PSE with integrated FETs but no internal 10-V/6.3-V analog supplies; requires external bias rails; 40-pin TQFN. | Used in cost-sensitive telecom equipment where external supply generation is already present and thermal pad layout flexibility is needed. | Select when existing board design includes dedicated analog bias supplies and thermal management favors exposed-pad top-side mounting. |
Compared with TPS2384APAP, TPS23861RSHR offers higher per-port power (30 W vs. 15.4 W) but lacks quad integration and AC disconnect, while MAX5984AETL+ reduces external component count less significantly due to missing internal analog regulators and different thermal pad orientation.
Availability
TPS2384APAP is available at Aetrix Electronics and suitable for Ethernet enterprise switches, PoE midspans, and industrial gateways requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing for production programs.
Supply support for TPS2384APAP 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, designing and manufacturing analog, embedded processing, and connectivity products for industrial, automotive, and communications markets.
The TPS2384APAP belongs to TI's Power-over-Ethernet (PoE) PSE product line, engineered specifically to simplify IEEE 802.3af-compliant multi-port power sourcing in enterprise and industrial networking infrastructure.
FAQ
What is the package type and thermal pad configuration of the TPS2384APAP?
The TPS2384APAP uses a 64-pin HTQFP package with PowerPAD™ down (PAP) construction, featuring an exposed thermal pad on the underside for soldering to the PCB ground plane. This configuration achieves a junction-to-board thermal resistance (RθJB) of 6.9°C/W, enabling efficient heat transfer in high-power PoE applications without external heatsinks.
Does the TPS2384APAP support both IEEE 802.3af and 802.3at standards?
The TPS2384APAP is explicitly compliant with IEEE 802.3af only, supporting up to Class 4 (30 W) power delivery per port under af-defined limits. It does not implement 802.3at-specific features such as two-event classification, extended power negotiation, or 60-W capability. For 802.3at support, TI recommends the TPS23861 or TPS2372-4 families instead of the TPS2384APAP.
How does the TPS2384APAP handle AC disconnect functionality?
The TPS2384APAP provides dedicated AC_HI and AC_LO totem-pole outputs that drive an external transformer to inject AC current onto the Ethernet pair, triggering AC disconnect in compatible PDs. This function is only available in power management mode (MS = high) and requires external circuitry - the TPS2384APAP itself does not generate the AC waveform but controls its timing and amplitude via register-programmed thresholds.
Can the TPS2384APAP operate without an external microcontroller?
Yes, the TPS2384APAP supports autonomous operation in auto-mode (MS pin held low), where it independently executes discovery, classification, and power-on sequencing for IEEE-compliant PDs. No external MCU is required for basic 802.3af functionality, though semi-auto and full power management modes require I²C interaction for advanced control and legacy PD support.
What are the key differences between the TPS2384APAP and TPS2384PJD variants?
The TPS2384APAP (PAP) and TPS2384PJD (PJD) share identical electrical specifications and pin functions but differ in PowerPAD™ orientation: PAP has the thermal pad on the bottom (standard down), while PJD places it on the top (up). This affects PCB layout, thermal via placement, and reflow profile - PJD requires top-side thermal management, whereas TPS2384APAP relies on bottom-side copper planes and vias.
TPS2384APAP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 64-PowerTQFP
- Packaging:
- Tray
- 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)
TPS2384APAP FAQ
1.How can I place an order for TPS2384APAP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2384APAP 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 TPS2384APAP reliable?
The price and inventory of TPS2384APAP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2384APAP is usually 5 days.
3.What payment methods are accepted for TPS2384APAP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2384APAP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2384APAP?
TPS2384APAP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2384APAP 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 TPS2384APAP?
For technical support, including TPS2384APAP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2384APAP requirements.
6.How does Aetrix verify that TPS2384APAP is sourced from the original manufacturer or authorized distributors?
All TPS2384APAP 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 TPS2384APAP meets industry standards.
7.What is the process for return or replacement of TPS2384APAP?
All TPS2384APAP units undergo pre-shipment inspection (PSI). If there is an issue with TPS2384APAP, 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 TPS2384APAP part is unused and in its original packaging.
Return procedure for TPS2384APAP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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