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Texas Instruments TPS2384APAPR
- Part No.:
- TPS2384APAPR
- Manufacturer:
- Texas Instruments
- Category:
- Power Over Ethernet (PoE) Controllers
- Package:
- 64-PowerTQFP
- Datasheet:
-
TPS2384APAPR.pdf
- Description:
- IC POE CNTRL 4 CHANNEL 64HTQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,802
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Product details
Overview
TPS2384APAPR 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 TPS2384APAPR datasheet, TPS2384APAPR pinout, TPS2384APAPR application, or TPS2384APAPR equivalent, key selection criteria include its 48-V input operation, 400-kHz I²C interface, –40°C to 125°C junction temperature range, integrated DC/AC disconnect capability, and support for legacy PD detection - all critical for robust Ethernet PSE system design.
Technical Context
The TPS2384APAPR 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 ground planes (AG1, AG2, DG, RG) and strict decoupling requirements.
It supports three functional modes: autonomous auto-mode (no MCU), semi-auto mode (I²C read-only status + limited control), and full power management mode (full I²C read/write with MSP430 co-processor). Port control uses dual-purpose pins (CT/SYN) for clock synchronization and RBIAS/CINT networks to set timing and A/D integration parameters.
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 48-V PoE supply tolerances and transient headroom. |
| Operating Temperature | –40°C to 125°C junction temperature - enables deployment in industrial Ethernet switches and outdoor mid-spans. |
| I²C Interface Speed | Up to 400 kHz - supports fast register access for real-time port monitoring and dynamic power allocation. |
| A/D Resolution | 15-bit integrating converter per port - delivers high-accuracy current/voltage/resistance measurements under noisy EMI conditions. |
| Port Count | Four independent PoE ports - allows single-chip management of quad-port Ethernet PSE systems without external FETs or sense resistors. |
| Internal Supplies | 10-V (V10), 6.3-V (V6.3), 3.3-V (V3.3), and 2.5-V (V2.5) regulated outputs - powers internal analog/digital blocks and provides low-current bias for external circuitry. |
Pinout & Package
TPS2384APAPR 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).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V48 | Primary power input | Accepts 44–57 V PoE supply; requires local 0.1-μF decoupling to AG1 - forms main power path for all four ports. |
| P1–P4, N1–N4 | Port differential sense/switch terminals | High-side (P#) and low-side (N#) connections per port - integrate current limiting and switching; no external FETs or sense resistors needed. |
| SCL / SDA_I / SDA_O | I²C interface | 400-kHz bidirectional bus (open-drain SDA_O + push-pull SDA_I); supports opto-isolation for Ethernet port separation. |
| CINT1–CINT4 | A/D integration capacitor node | Connects to precision 0.027-μF capacitor referenced to RG - sets integration time for 15-bit A/D conversion per port. |
| RBIAS | Bias current reference | 124-kΩ resistor to RG sets internal bias currents and synchronizes A/D timing - critical for IEEE 802.3af compliance. |
| MS | Mode select | Logic-low = auto mode (standalone); logic-high = power management mode (I²C-controlled) - defines system architecture dependency on MCU. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated port switches | Eliminates two external components (FET + sense resistor) per port - reduces BOM count, PCB area, and thermal design complexity. |
| DC/AC disconnect | On-chip AC_LO/AC_HI totem-pole drivers enable IEEE 802.3af AC disconnect - avoids need for external MOSFET gate drivers or transformers. |
| Legacy PD detection | Supports non-compliant powered devices via dedicated legacy current limit (2.6–4.3 mA) and voltage A/D scaling - extends compatibility to older VoIP phones and cameras. |
| Overtemperature protection | Dedicated thermal detector shuts down ports before junction exceeds 125°C - prevents field failure in enclosed switch chassis. |
| Controlled current ramp | Programmable slew rate limits inrush into PD bulk capacitance - reduces EMI and avoids false overcurrent trips during power-up. |
Applications
| Enterprise Ethernet Switches | SOHO Hubs |
|---|---|
Use Scenario: 24-port managed switch delivering PoE to IP phones, wireless APs, and security cameras across multiple VLANs. IC Role / Device Role / Timing Role: Quad-port PSE power manager handling up to four concurrent PoE channels with real-time current/voltage monitoring and fault isolation. Use Value: Enables compact, thermally efficient quad-port PSE subsystems with integrated A/D and I²C-based power budgeting - reducing reliance on discrete sensing and MCU coordination. | Use Scenario: Compact 8-port desktop hub powering VoIP handsets and low-power IoT sensors in small office environments. IC Role / Device Role / Timing Role: Standalone PSE controller in auto-mode, autonomously detecting/classifying/powering connected PDs without external microcontroller. Use Value: Low-system-cost implementation using MS pin tied low - eliminates firmware development and reduces bill-of-materials for cost-sensitive SOHO equipment. |
| Ethernet Mid-Spans | PSE Injectors |
Use Scenario: Inline 4-port mid-span unit inserted between legacy non-PoE switch and PoE-capable endpoints. IC Role / Device Role / Timing Role: Full-featured PSEPM managing discovery, classification, DC/AC disconnect, and legacy detection across four independent Ethernet pairs. Use Value: Survives 100-V transients on port lines and supports both IEEE-compliant and legacy PDs - ensuring field reliability and backward compatibility. | Use Scenario: Single-port injector adding PoE capability to a laptop docking station or network video recorder with one Ethernet uplink. IC Role / Device Role / Timing Role: Configurable quad-port device used in 1-port mode with programmable current limit (350–400 mA) and UV/OV protection. Use Value: Flexible port assignment and precise A/D-based current monitoring allow accurate per-port power capping - critical for USB-C + PoE hybrid power delivery systems. |
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 |
|---|---|---|---|
| TPS23861RSLR | Single-port IEEE 802.3at/af-compliant PSE with integrated FETs; smaller 32-pin QFN; lacks quad-port integration and legacy detection. | Targeted at space-constrained single-port injectors or embedded systems requiring higher 30-W Class 4 power. | Select when only one PoE port is needed and 802.3at compliance is required - not suitable as drop-in replacement for quad-port TPS2384APAPR. |
| MAX5984AEUI+ | Quad-port 802.3af PSE with integrated FETs and 12-bit A/D; operates from 36–57 V; no AC disconnect or legacy detection support. | Used in telecom line cards and industrial controllers where lower-resolution monitoring suffices and AC disconnect is unnecessary. | Choose for cost-sensitive quad-port designs where AC disconnect and legacy PD support are not required - differs in pinout, register map, and thermal performance. |
Compared with TPS2384APAPR, TPS23861RSLR offers higher per-port power but no multi-port integration, while MAX5984AEUI+ provides quad-port capability with reduced feature depth - making TPS2384APAPR uniquely suited for full-featured, thermally demanding mid-span and enterprise switch applications requiring legacy compatibility and AC disconnect.
Availability
TPS2384APAPR is available at Aetrix Electronics and suitable for Ethernet enterprise switches, SOHO hubs, and PoE mid-spans requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for TPS2384APAPR 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 TPS2384APAPR belongs to TI's Power-over-Ethernet (PoE) PSE product line, engineered specifically for high-reliability, multi-port Ethernet infrastructure equipment requiring integrated power management, precise current sensing, and IEEE 802.3af compliance.
FAQ
What is the maximum operating junction temperature for the TPS2384APAPR?
The TPS2384APAPR has a specified maximum junction temperature of 125°C, with thermal metrics including RθJA = 23.9°C/W (PAP package) and RθJC(bot) = 0.2°C/W. This rating enables reliable operation in enclosed Ethernet switch chassis and industrial mid-span enclosures when proper PCB copper area and thermal vias are implemented per TI layout guidelines.
Does the TPS2384APAPR support IEEE 802.3at (PoE+) compliance?
No, the TPS2384APAPR is explicitly compliant only with IEEE 802.3af (15.4 W per port). It does not meet 802.3at requirements for higher power classes (Class 4, up to 30 W), nor does its electrical specification include the extended classification voltage ranges or current limits defined in 802.3at. For 802.3at support, TI recommends the TPS23861 or TPS2372 series.
How does the TPS2384APAPR handle legacy (non-802.3af) powered devices?
The TPS2384APAPR supports legacy PD detection via dedicated circuitry that applies a 2.6–4.3 mA current limit and measures port voltage using a calibrated 1365–1445 counts/V A/D scale factor. This allows safe identification and power delivery to pre-standard VoIP phones and cameras without risking damage from uncontrolled current surges.
What is the function of the RBIAS and CINT pins on the TPS2384APAPR?
The RBIAS pin (with 124-kΩ resistor to RG) sets internal bias currents and coordinates timing for the 15-bit integrating A/D converters. The CINT pins (CINT1–CINT4) connect to 0.027-μF capacitors referenced to RG and define integration time constants - together they ensure IEEE 802.3af-compliant discovery/classification timing and 60-Hz noise rejection in the TPS2384APAPR.
Can the TPS2384APAPR operate without an external microcontroller?
Yes, the TPS2384APAPR supports standalone operation in auto mode when the MS pin is held low. In this configuration, it autonomously executes discovery, classification, and power-on sequencing for all four ports without I²C intervention - ideal for cost-sensitive or firmware-free PSE implementations such as basic SOHO hubs and mid-spans.
TPS2384APAPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 64-PowerTQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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)
TPS2384APAPR FAQ
1.How can I place an order for TPS2384APAPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2384APAPR 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 TPS2384APAPR reliable?
The price and inventory of TPS2384APAPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2384APAPR is usually 5 days.
3.What payment methods are accepted for TPS2384APAPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2384APAPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2384APAPR?
TPS2384APAPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2384APAPR 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 TPS2384APAPR?
For technical support, including TPS2384APAPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2384APAPR requirements.
6.How does Aetrix verify that TPS2384APAPR is sourced from the original manufacturer or authorized distributors?
All TPS2384APAPR 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 TPS2384APAPR meets industry standards.
7.What is the process for return or replacement of TPS2384APAPR?
All TPS2384APAPR units undergo pre-shipment inspection (PSI). If there is an issue with TPS2384APAPR, 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 TPS2384APAPR part is unused and in its original packaging.
Return procedure for TPS2384APAPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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