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Texas Instruments TPS2383APMR
- Part No.:
- TPS2383APMR
- Manufacturer:
- Texas Instruments
- Category:
- Power Over Ethernet (PoE) Controllers
- Package:
- 64-LQFP
- Datasheet:
-
TPS2383APMR.pdf
- Description:
- IC POE CNTRL 8 CHANNEL 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,934
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Product details
Overview
TPS2383APMR from Texas Instruments is a Power Sourcing Equipment Power Manager (PSEPM) IC compliant with IEEE 802.3af PoE standard, designed for mid-span injectors and Ethernet switches. It supports eight independent PoE ports, delivers up to 425 mA per port with controlled di/dt ramp, integrates 12-bit A/D acquisition for port current/voltage, and features dual-color LED drivers and hardware FAULT interrupt.
For engineers reviewing the TPS2383APMR datasheet, TPS2383APMR pinout, TPS2383APMR application, or TPS2383APMR equivalent, this device serves as a fully programmable, I²C-controlled PSE manager requiring precise discovery/classification timing, external N-channel MOSFET gate control, and isolated serial interface support via opto-coupler-compatible SDA/SCL lines.
Technical Context
The TPS2383APMR implements a master sequencer architecture that cycles through eight ports using shared analog resources - including one 12-bit A/D converter, one ramp control circuit (CR/CT/CINT), and one discovery/classification voltage control loop. Each port has dedicated gate drive (1G–8G), sense (1RS–8RS), and power path terminals (1P/1N–8P/8N), enabling independent fault detection (UV/OV/OC/undercurrent) and state management.
It uses external N-channel MOSFETs for low-RDS(on) switching, generates HV gate drive (up to 10 V) from the 48-V bus, and supports opto-isolated I²C via separate SDA_I/SDA_O pins. The device operates with three supply rails: 48 V (V48), 5 V (V5), and 3.3 V (VL), with internal POR sequencing ensuring safe register initialization before power delivery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IEEE Standard | Compliant with IEEE 802.3af PoE specification for discovery, classification, and power delivery. |
| Port Count | Manages up to 8 independent Ethernet ports with per-port control registers and status monitoring. |
| Max Gate Drive Voltage | 10 V output on G pins enables full enhancement of low-cost external N-channel MOSFETs. |
| A/D Resolution | 12-bit acquisition for real-time port current (±0.5 Ω sense resistor) and voltage measurement. |
| I²C Interface | Slave-mode I²C with 5-bit address select (A1–A5), 400 kHz max clock, and opto-coupler-ready SDA_I/SDA_O separation. |
| Power Ramp Control | Controlled di/dt ramp-up/down via CR capacitor reduces EMI during PD power-up and power-down. |
| Fault Detection | Detects input UVLO (30–38 V), port UV (40–44 V), OV (56–63 V), overcurrent (>375 mA avg), and undercurrent (<10 mA avg). |
Pinout & Package
The TPS2383APMR is housed in a 64-pin LQFP (PM) package with exposed thermal pad, rated for −40°C to +85°C ambient operation and 65°C/W junction-to-ambient thermal resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V48 | +48 V Input Supply | Main PoE power rail input (44–57 V range); powers internal HV gate driver and analog circuits. |
| 1P–8P / 1N–8N | Port Positive/Negative Sense | Differential high-side (+48 V) and low-side (return) sense paths for each of 8 PoE ports. |
| 1G–8G | N-Channel MOSFET Gate Driver | Linear current amplifier outputs driving external low-side FET gates with controlled ramp profiles. |
| 1RS–8RS | Kelvin Current Sense Input | High-precision kelvin sense for 0.5 Ω shunt; sets overcurrent/undercurrent thresholds and classification accuracy. |
| SCL_I / SDA_I / SDA_O | I²C Serial Interface | Separated input/output data lines enable opto-isolation between controller ground and PoE port grounds. |
| INTB | Open-Drain Fault Interrupt | Active-low signal asserted when any port detects UV/OV/OC/fault; requires external pull-up. |
| L1–L8 | Dual-Color LED Driver | Tri-state outputs supporting single/dual-color LEDs for per-port status indication under I²C control. |
| A1–A5 | I²C Address Select | Binary address inputs allowing up to 32 devices on same I²C bus (32 × 8 = 256 total ports). |
Key Features
| Feature | Design Value |
|---|---|
| Two-point 25-kΩ Discovery | Uses precision RD resistor (665 Ω) and internal bias to detect compliant PD signature without damaging legacy equipment. |
| Capacitive Legacy Load Detection | Enables identification of non-802.3 devices by measuring load capacitance via integrated A/D converter. |
| Programmable Classification Bypass | Per-port register bit allows skipping classification to reduce power-up latency in fixed-power applications. |
| Electronic Circuit Breaker | Hardware-enforced disconnect on UV/OV/OC faults with configurable timers (e.g., 1024 CLK for UV/OV turn-off). |
| Opto-Coupler Compatible I²C | Separate SDA_I and SDA_O pins simplify galvanic isolation for multi-ground PoE systems. |
Applications
| Enterprise Switching Infrastructure | Mid-Span PoE Injectors |
|---|---|
Use Scenario: Managed Gigabit Ethernet switch delivering PoE to IP phones, wireless APs, and security cameras across 48 ports. IC Role / Device Role / Timing Role: TPS2383APMR acts as per-port PSE manager, executing discovery/classification/power ramp sequences under MSP430 microcontroller coordination via I²C. Use Value: Enables real-time port current/voltage telemetry (12-bit A/D) and fault logging across all ports without host CPU overhead. | Use Scenario: Standalone 8-port mid-span injector adding PoE capability to legacy non-PoE switches in industrial control cabinets. IC Role / Device Role / Timing Role: TPS2383APMR manages isolated 48-V power delivery per port while maintaining ground separation between data and power domains. Use Value: Dual SDA lines (SDA_I/SDA_O) allow opto-isolation of I²C bus, eliminating ground loops between upstream switch and downstream PDs. |
| Smart Building Network Hubs | IoT Edge Gateway Power Management |
Use Scenario: Converged building automation hub powering VoIP intercoms, occupancy sensors, and digital signage over Cat5e cabling. IC Role / Device Role / Timing Role: TPS2383APMR performs per-port classification to allocate power budgets dynamically based on connected device type (Class 0–4). Use Value: Programmable ClassLimit1/ClassLimit2 bits enable custom power tiering beyond IEEE 802.3af classes for optimized energy use. | Use Scenario: Compact edge gateway aggregating BLE/Zigbee sensor data and powering field nodes via PoE. IC Role / Device Role / Timing Role: TPS2383APMR executes fast ramp-up (controlled di/dt) to charge PD bulk capacitance within 50 ms, minimizing boot delay. Use Value: CR capacitor-based ramp control ensures EMI stays within FCC Class B limits during simultaneous multi-port power-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PoE PSE management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2384APMR | Higher integration: includes internal 48-V DC-DC controller and integrated MOSFET drivers; no external HV gate drive needed. | Reduces BOM count and layout area but increases quiescent current; not pin-compatible with TPS2383APMR. | Select TPS2384APMR when system-level size/cost optimization outweighs need for discrete MOSFET selection flexibility. |
| MAX5980GTJ+ | 4-port PSE PM with integrated hot-swap controller; supports IEEE 802.3at (PoE+) up to 30 W/port; different I²C register map and timing. | Targeted at higher-power, lower-port-count applications; lacks 8-port scalability and dual-color LED drivers. | Choose MAX5980GTJ+ only for PoE+ compliance requirements and designs where 4 ports suffice with tighter space constraints. |
Compared with TPS2383APMR, TPS2384APMR eliminates external MOSFET gate drive complexity but sacrifices discrete FET selection for efficiency tuning, while MAX5980GTJ+ adds PoE+ capability at the cost of port count and feature parity in LED/status signaling.
Availability
TPS2383APMR is available at Aetrix Electronics and suitable for PoE mid-span injectors, enterprise Ethernet switches, and smart building infrastructure requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial deployments.
Supply support for TPS2383APMR 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 markets.
The TPS2383A/B product line was engineered specifically for IEEE 802.3af-compliant Power Sourcing Equipment, targeting scalable, software-configurable PoE infrastructure with high channel density and robust fault management.
FAQ
What is the operating temperature range for the TPS2383APMR?
The TPS2383APMR is specified for operation from −40°C to +85°C ambient temperature. Its LQFP-64 package has a thermal resistance of 65°C/W (junction-to-ambient), and derating begins above 25°C at 15.4 mW/°C. The device includes internal thermal protection and operates reliably within this range when mounted on a PCB with appropriate copper pour and decoupling.
Does the TPS2383APMR support IEEE 802.3at (PoE+)?
No, the TPS2383APMR is compliant only with IEEE 802.3af (Type 1, up to 15.4 W per port). It does not support the higher power levels, extended classification, or two-event classification required by 802.3at. For PoE+ compatibility, TI recommends the TPS23861 or TPS2372-4, which include enhanced current limits and dual-event classification logic not present in the TPS2383APMR.
How many TPS2383APMR devices can share one I²C bus?
Up to 32 TPS2383APMR devices can share a single I²C bus using the five address-select pins (A1–A5), providing 32 unique 5-bit slave addresses. Each device can manage 8 PoE ports, enabling centralized control of up to 256 ports from one I²C master controller - a key scalability feature confirmed in the SLUS565F datasheet functional description.
What external components are mandatory for basic TPS2383APMR operation?
Mandatory external components for TPS2383APMR include: (1) 0.5 Ω current-sense resistors (1RS–8RS), (2) 665 Ω discovery resistor (RD), (3) 120 kΩ bias resistor (RT), (4) 0.1 µF CR capacitor for ramp control, (5) 0.033 µF CINT capacitor for A/D integration, and (6) decoupling capacitors on V48, V5, VL, and AG1/AG2. These are explicitly required in the SLUS565F datasheet terminal functions and electrical characteristics sections.
Can the TPS2383APMR operate without a 48-V supply present?
Yes - the TPS2383APMR supports "digital-only" operation with only VL (3.3 V) and V5 (5 V) supplies active, while V48 is absent. In this mode, the I²C interface remains fully functional for register configuration and status polling, enabling pre-power diagnostics and system initialization before 48-V application. This behavior is documented in the SLUS565F datasheet description section and verified in the recommended operating conditions table.
TPS2383APMR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 64-LQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Controller (PSE)
- Number of Channels:
- 8
- Power - Max:
- 15.4 W
- Internal Switch(s):
- No
- Auxiliary Sense:
- No
- Standards:
- 802.3af (PoE)
- Voltage - Supply:
- 44V ~ 57V
- Current - Supply:
- 5mA
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-LQFP (10x10)
TPS2383APMR FAQ
1.How can I place an order for TPS2383APMR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2383APMR 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 TPS2383APMR reliable?
The price and inventory of TPS2383APMR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2383APMR is usually 5 days.
3.What payment methods are accepted for TPS2383APMR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2383APMR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2383APMR?
TPS2383APMR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2383APMR 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 TPS2383APMR?
For technical support, including TPS2383APMR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2383APMR requirements.
6.How does Aetrix verify that TPS2383APMR is sourced from the original manufacturer or authorized distributors?
All TPS2383APMR 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 TPS2383APMR meets industry standards.
7.What is the process for return or replacement of TPS2383APMR?
All TPS2383APMR units undergo pre-shipment inspection (PSI). If there is an issue with TPS2383APMR, 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 TPS2383APMR part is unused and in its original packaging.
Return procedure for TPS2383APMR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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