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Texas Instruments TPS2384PAP
- Part No.:
- TPS2384PAP
- Manufacturer:
- Texas Instruments
- Category:
- Power Over Ethernet (PoE) Controllers
- Package:
- 64-PowerTQFP
- Datasheet:
-
TPS2384PAP.pdf
- Description:
- IC POE CNTRL 4 CHANNEL 64HTQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,869
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Product details
Overview
TPS2384PAP 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/temperature measurement, and supporting auto, semi-auto, and power management modes for PoE mid-span and switch applications.
For engineers reviewing the TPS2384PAP datasheet, TPS2384PAP pinout, TPS2384PAP application, or TPS2384PAP equivalent, this device delivers deterministic IEEE 802.3af compliance, high-speed 400-kHz I²C control, DC/AC disconnect capability, and robust thermal protection across –40°C to 125°C operation - critical for enterprise Ethernet PSE system design and validation.
Technical Context
The TPS2384PAP implements a fully integrated quad-port PSE architecture with on-die 15-bit integrating A/D converters per port, each measuring discovery resistance, classification current, powered-mode voltage/current, and die temperature using low-leakage CINT capacitors and precision RBIAS-biased timing. Its internal 10-V, 6.3-V, and 3.3-V analog/digital supplies are generated from the 48-V rail and externally decoupled to ensure noise immunity in harsh Ethernet environments.
It supports three functional modes: autonomous auto mode (no MCU required), semi-auto mode (I²C read-only status + limited control), and full power management mode (full I²C read/write with legacy detection, AC disconnect, and real-time port telemetry). The device uses dual-purpose pins (CT/SYN) for clock distribution or external synchronization and includes dedicated AC_LO/AC_HI totem-pole outputs for AC disconnect excitation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IEEE Standard | Compliant to 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. |
| Operating Temperature | –40°C to +125°C junction - enables deployment in industrial-grade Ethernet infrastructure. |
| I²C Interface Speed | Up to 400 kHz - supports fast register access for dynamic port control and telemetry polling. |
| Port A/D Resolution | 15-bit integrating converter per port - provides high-accuracy, noise-immune measurement of discovery resistance (±0.5 kΩ), classification current (±1 mA), and powered-mode current/voltage. |
| Internal Supplies | 10 V (V10), 6.3 V (V6.3), 3.3 V (V3.3), and 2.5 V (V2.5) - all internally generated and separately decoupled to isolate analog/digital domains. |
| Thermal Resistance | RθJA = 23.9°C/W (PAP package) - enables reliable operation at full load with standard PCB copper area and optional heat sink. |
Pinout & Package
TPS2384PAP is housed in a 64-pin HTQFP (PowerPAD™ down) 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).
| 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. |
| P1–P4 / N1–N4 | Port high-side/low-side terminals | Direct connection to Ethernet pairs; integrated FETs and current sensing eliminate external components per port. |
| CINT1–CINT4 | Analog integration capacitor node | Connects to RG via 0.027-μF low-leakage capacitor; sets A/D conversion accuracy and 60-Hz noise rejection. |
| SCL / SDA_I / SDA_O | I²C interface | 400-kHz bidirectional bus; SDA_O is open-drain for opto-isolation compatibility in isolated PSE designs. |
| AC_LO / AC_HI | AC disconnect excitation | Push-pull outputs driving external AC coupling circuitry for IEEE 802.3af AC disconnect detection. |
| INTB | Fault interrupt output | Active-low open-drain signal asserting on any port fault (UV/OV/OC/thermal) - enables system-level fault prioritization. |
Key Features
| Feature | Design Value |
|---|---|
| Quad-port integration with FETs + sense resistors | Reduces BOM count by 8 components (4× FET + 4× sense resistor) and eliminates layout sensitivity to current-sense accuracy. |
| 15-bit per-port integrating A/D converter | Enables ±0.5% resistance measurement during discovery and ±1 mA current resolution during classification - critical for Class 0–4 PD identification. |
| Three operational modes (auto/semi-auto/PMM) | Supports controller-less deployment (auto), hybrid monitoring (semi-auto), or full firmware-driven power orchestration (PMM) without hardware change. |
| Controlled current ramp during power-up | Limits inrush into PD bulk capacitance and reduces EMI generation - avoids false overcurrent trips and improves EMC compliance. |
| Dual watchdog timers (I²C clock + oscillator) | Ensures fail-safe behavior: disables ports if I²C communication stalls or internal oscillator fails - mandatory for safety-critical PSE systems. |
| DC and AC disconnect support | Meets IEEE 802.3af requirements for both DC undercurrent (e.g., PD removal) and AC signature-based disconnect (e.g., cable fault). |
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 power manager handling up to four concurrent PoE channels per TPS2384PAP, coordinating discovery/classification/power delivery with precise timing control. Use Value: Enables compact, thermally efficient multi-port PSE design with deterministic 802.3af compliance and real-time port telemetry via I²C. |
Use Scenario: Standalone 4-port PoE injectors adding power to existing data-only Ethernet links. IC Role / Device Role / Timing Role: Autonomous PSE controller executing full discovery-classify-power sequence without MCU, using internal state machine and integrated A/D. Use Value: Eliminates need for external microcontroller and discrete power components - reduces bill-of-materials and simplifies certification. |
| SOHO Hubs with PoE | Industrial Ethernet PSE Modules |
|
Use Scenario: Small-office/home-office hubs powering VoIP phones and IoT sensors over Cat 5e cabling. IC Role / Device Role / Timing Role: Low-cost PSE manager operating in auto mode with configurable back-off timing (ALTA/B pin) after failed discovery. Use Value: Supports cost-sensitive designs while maintaining robust legacy PD detection and thermal shutdown at 125°C junction. |
Use Scenario: Ruggedized DIN-rail mounted PoE modules for factory automation and rail transit networks. IC Role / Device Role / Timing Role: High-reliability PSE core with extended temperature range (–40°C to 125°C), overtemperature protection, and 100-V transient survivability. Use Value: Ensures continuous operation in harsh environments where ambient temperature and ESD stress exceed commercial limits. |
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 802.3at/af-compliant PSE with integrated FETs; lower channel count but supports higher 30-W Class 4 power per port. | Targeted at high-power single-port applications (e.g., PTZ cameras); lacks quad-port integration and auto-mode standalone operation. | Select when per-port power >25.5 W is required and system architecture favors modular single-port PSEs. |
| MAX5984AEEE+ | Quad-port 802.3af PSE with integrated FETs and 12-bit A/D; no built-in 15-bit integrating converter or AC disconnect outputs. | Requires external AC coupling circuitry; supports only basic discovery/classification - not full AC disconnect per IEEE 802.3af. | Choose for cost-sensitive quad-PSE designs where AC disconnect is not mandated and 12-bit A/D resolution suffices. |
Compared with TPS2384PAP, TPS23861PWR offers higher per-port power but requires four devices for quad-channel operation and lacks autonomous auto mode, while MAX5984AEEE+ reduces integration depth - omitting AC_LO/AC_HI outputs and 15-bit A/D - limiting compliance verification fidelity in demanding deployments.
Availability
TPS2384PAP is available at Aetrix Electronics and suitable for enterprise Ethernet switches, PoE mid-spans, SOHO hubs, and industrial PSE modules requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for TPS2384PAP 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 power infrastructure ICs.
The TPS2384PAP belongs to TI's Power-over-Ethernet PSE power manager product line, designed specifically to simplify IEEE 802.3af-compliant multi-port PSE implementation with integrated switching, sensing, and telemetry - targeting enterprise, industrial, and infrastructure networking equipment.
FAQ
What is the primary function of the TPS2384PAP in a PoE system?
The TPS2384PAP serves as a quad-port Power Sourcing Equipment (PSE) power manager IC that autonomously performs IEEE 802.3af-compliant discovery, classification, and power delivery to Powered Devices (PDs) over Ethernet cables. It integrates FETs and sense resistors per port, eliminating external components, and provides real-time telemetry via four 15-bit A/D converters - making it ideal for mid-span injectors and enterprise switches. The TPS2384PAP operates from a single 44–57-V supply and supports auto, semi-auto, and full power management modes.
Does the TPS2384PAP support both DC and AC disconnect per IEEE 802.3af?
Yes, the TPS2384PAP fully supports both DC and AC disconnect as required by IEEE 802.3af. It implements DC disconnect through undercurrent detection during powered mode and includes dedicated totem-pole AC_LO and AC_HI output pins to drive external AC coupling circuitry for signature-based AC disconnect. These features are validated in the device's electrical characteristics and timing tables (e.g., disconnect timer current threshold, AC_LO/AC_HI voltage specs), ensuring compliance without external logic.
What are the key thermal specifications of the TPS2384PAP package?
The TPS2384PAP uses a 64-pin HTQFP PowerPAD™ down (PAP) package with a 10.0 mm × 10.0 mm body and exposed thermal pad. Its junction-to-ambient thermal resistance (RθJA) is 23.9°C/W under standard JEDEC conditions, and junction-to-board (RθJB) is 6.9°C/W - enabling reliable operation at full 30-W-per-port load with appropriate PCB copper area. Overtemperature protection triggers at 125°C junction temperature, and thermal metrics are documented in Section 6.4 of the SLUS634F datasheet.
How does the TPS2384PAP handle I²C communication isolation in isolated PSE designs?
The TPS2384PAP supports I²C isolation via its open-drain SDA_O pin and push-pull SCL input, allowing direct connection to optocouplers without level-shifting. The SDA_I and SDA_O pins can be tied together externally to form a standard bidirectional SDA line, while SDA_O's 100-nA leakage and 200-mV logic-low specification ensure compatibility with common optocoupler input stages. This architecture enables galvanic isolation between the PSE controller and Ethernet PHY side - essential for safety-certified PoE systems.
Can the TPS2384PAP operate without a microcontroller?
Yes, the TPS2384PAP supports fully autonomous operation in auto mode (MS pin grounded), where it executes sequential discovery, classification, and power-on for all four ports without external firmware. Internal state machines, 15-bit A/D converters, and programmable back-off timing (via ALTA/B pin) enable robust standalone PSE functionality - verified in typical application diagrams and functional mode descriptions in SLUS634F. This makes the TPS2384PAP suitable for cost-sensitive or space-constrained designs where MCU integration is impractical.
TPS2384PAP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 64-PowerTQFP
- 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)
TPS2384PAP FAQ
1.How can I place an order for TPS2384PAP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2384PAP 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 TPS2384PAP reliable?
The price and inventory of TPS2384PAP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2384PAP is usually 5 days.
3.What payment methods are accepted for TPS2384PAP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2384PAP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2384PAP?
TPS2384PAP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2384PAP 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 TPS2384PAP?
For technical support, including TPS2384PAP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2384PAP requirements.
6.How does Aetrix verify that TPS2384PAP is sourced from the original manufacturer or authorized distributors?
All TPS2384PAP 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 TPS2384PAP meets industry standards.
7.What is the process for return or replacement of TPS2384PAP?
All TPS2384PAP units undergo pre-shipment inspection (PSI). If there is an issue with TPS2384PAP, 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 TPS2384PAP part is unused and in its original packaging.
Return procedure for TPS2384PAP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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