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Texas Instruments TPS2383PMR
- Part No.:
- TPS2383PMR
- Manufacturer:
- Texas Instruments
- Category:
- Power Over Ethernet (PoE) Controllers
- Package:
- 64-LQFP
- Datasheet:
-
TPS2383PMR.pdf
- Description:
- IC POE CNTRL 8 CHANNEL 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,213
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Product details
Overview
TPS2383PMR from Texas Instruments is an IEEE 802.3af-compliant Power Sourcing Equipment (PSE) power manager IC for Ethernet-based PoE mid-span injectors and switches. It manages up to eight PoE ports, performs two-point 25-kΩ discovery, capacitive legacy load detection, and 12-bit per-port current/voltage acquisition. It operates from a single +48-V supply with 3.3-V digital and 5-V analog rails, supporting real-time fault monitoring in telecom infrastructure.
For engineers reviewing the TPS2383PMR datasheet, TPS2383PMR pinout, TPS2383PMR application, or TPS2383PMR equivalent, this device serves as a programmable, I²C-controlled PSEPM with dual-color LED status drivers, opto-coupler-compatible I²C lines, and hardware FAULT interrupt-critical for scalable, isolated, and UL/IEC950-compliant PoE system design.
Technical Context
The TPS2383PMR implements a master sequencer architecture that cycles through eight independent port state machines, coordinating shared resources including a 12-bit A/D converter, ramp control circuitry (CR/CT/CINT), and discovery/classification voltage loops. Each port uses external N-channel MOSFETs controlled via dedicated gate drive outputs (1G–8G) with programmable di/dt ramping and fast fault turn-off (7.5 µs overcurrent response).
Its I²C slave interface supports 5-bit address selectability (A1–A5), enabling up to 32 devices on one bus and 256 total managed ports. Dual SDA lines (SDA_I/SDA_O) allow opto-isolation of the I²C bus while maintaining ground separation between controller and 48-V PoE domain-essential for safety-certified industrial and telecom deployments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IEEE Standard | Compliant with IEEE 802.3af for PoE discovery, classification, and power delivery. |
| Port Count | Manages 8 independent Ethernet ports with per-port register control and status reporting. |
| Supply Voltage | +48 V input range (44–57 V); also requires external 3.3-V logic (VL) and 5-V analog (V5) supplies. |
| Current Sensing | 12-bit A/D acquisition of port current (0–425 mA) and voltage (40–55 V) with 0.5-Ω sense resistor. |
| Discovery Method | Two-point 25-kΩ resistance detection plus capacitive detection for non-compliant legacy loads. |
| Fault Response | Hardware FAULT interrupt (INTB), UVLO (28–40 V), overvoltage (51–55 V), and overload shutdown (50–100 ms timeout). |
| I²C Interface | Standard slave-mode I²C at ≤400 kHz; 5-bit address select (A1–A5); opto-coupler compatible SDA_O output. |
Pinout & Package
The TPS2383PMR is housed in a 64-pin LQFP (PM package) with exposed thermal pad, rated for 0°C to 70°C operation. Pin functions are validated per TI SLUS559B datasheet, including dedicated analog/digital grounds (AG1, AG2, DG, RG), eight port pairs (1P/1N through 8P/8N), gate drives (1G–8G), sense inputs (1RS–8RS), and dual I²C data paths (SDA_I/SDA_O).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V48 (Pin 27) | +48-V primary power input | Supplies internal HV gate drive and analog circuits; accepts 44–57 V with UVLO at 28–40 V. |
| 1P–8P / 1N–8N | Port differential sense terminals | Monitor +48 V and return path for each of eight PoE ports; enable differential voltage/current control. |
| 1G–8G | N-MOSFET gate drive outputs | Linear current amplifier outputs driving external low-side FETs; ramp control up to 10 V, 425 mA max sourcing. |
| 1RS–8RS | Kelvin current sense inputs | High-side sensing of 0.5-Ω shunt resistors; set overcurrent thresholds, classification current, and PD inrush limits. |
| SDA_I / SDA_O | Isolated I²C data interface | SDA_I receives bidirectional I²C data; SDA_O is open-drain HV output for opto-coupler LED drive from +48-V rail. |
| INTB (Pin 59) | Open-drain fault interrupt | Active-low signal asserted when any port detects UV/OV/OC/fault; enables immediate host controller response. |
| A1–A5 (Pins 64–60) | I²C address select inputs | Binary-encoded address pins allowing up to 32 TPS2383PMR devices on one I²C bus. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable discovery bypass | Per-port register control allows skipping classification to reduce power-up time in fixed-load applications. |
| Controlled di/dt ramp | CR capacitor-based linear current ramping minimizes EMI during PD power-up and power-down sequences. |
| Dual-color LED drivers (L1–L8) | Tri-state, 10-mA capable outputs support status indication, opto-coupler drive, or general-purpose I/O without external buffers. |
| Shared A/D resource with 12-bit resolution | Single high-precision converter multiplexed across all 8 ports delivers real-time current/voltage/resistance/capacitance measurements. |
| Internal HV gate supply generation | Derives >8-V gate drive from +48-V rail-eliminates need for separate high-voltage bias supply and reduces BOM count. |
Applications
| Enterprise VoIP Phone Deployment | Industrial Ethernet Switch |
|---|---|
Use Scenario: Powering IEEE 802.3af-compliant VoIP phones across a campus LAN with centralized management and remote diagnostics. IC Role / Device Role / Timing Role: TPS2383PMR acts as the per-port PSE power manager, executing discovery, classification, and regulated 48-V delivery while reporting real-time current draw per phone. Use Value: Enables accurate power budgeting, hot-swap capability, and fault isolation-reducing service calls and improving uptime for distributed voice infrastructure. | Use Scenario: Integrating PoE into ruggedized industrial switches deployed in factory automation networks with strict EMC and safety requirements. IC Role / Device Role / Timing Role: TPS2383PMR provides isolated, opto-coupled I²C control and UL/IEC950-compliant fault protection for up to eight PoE ports in harsh EMI environments. Use Value: Supports self-resetting PTC fuse integration and controlled di/dt ramping to meet EN 61000-4-2/3/4 immunity standards without added filtering components. |
| Mid-Span PoE Injector | Smart Building Network Hub |
Use Scenario: Adding PoE capability to legacy non-PoE network switches using compact, rack-mountable mid-span injectors. IC Role / Device Role / Timing Role: TPS2383PMR serves as the core PSE controller, managing power delivery to downstream IP cameras or wireless APs while providing LED status feedback. Use Value: Allows cost-effective retrofitting with minimal board space-leveraging external low-RDS(on) MOSFETs and shared analog resources across all ports. | Use Scenario: Centralized power management for lighting controllers, access sensors, and HVAC actuators in intelligent building systems. IC Role / Device Role / Timing Role: TPS2383PMR monitors per-port current consumption and detects disconnected or undercurrent loads (e.g., failed sensor), triggering automated alerts. Use Value: Delivers deterministic fault detection (10 mA undercurrent threshold) and 12-bit telemetry-enabling predictive maintenance and energy usage analytics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PSE power manager applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2384PMR | Higher integration: includes integrated 100-V N-channel MOSFETs; eliminates need for external FETs and gate drive circuitry. | Better suited for space-constrained designs where board area and component count must be minimized. | Select TPS2384PMR when external FET layout complexity or thermal management is prohibitive; accept higher channel RDS(on) and reduced flexibility in FET selection. |
| MAX5974A | Single-port PSE controller with integrated 100-V switch; lacks multi-port sequencing, shared A/D, or I²C addressability beyond 2 devices. | Targeted at low-port-count applications like embedded PoE endpoints or modular add-on cards. | Choose MAX5974A only for single-port or dual-port systems requiring minimal footprint and simpler firmware-no support for 8-port coordinated management. |
Compared with TPS2384PMR and MAX5974A, the TPS2383PMR uniquely balances scalability (8 ports, 32-device I²C addressing), measurement fidelity (12-bit shared A/D), and external FET flexibility-making it optimal for mid- to high-port-count PoE switches and injectors requiring precise telemetry and thermal optimization.
Availability
TPS2383PMR is available at Aetrix Electronics and suitable for PoE mid-span injectors, enterprise Ethernet switches, and industrial network infrastructure requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for TPS2383PMR 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 connectivity technologies with broad industrial, automotive, and communications portfolios.
The TPS2383PMR belongs to TI's Power over Ethernet (PoE) PSE power manager product line, designed specifically for scalable, standards-compliant, and safety-certified Ethernet infrastructure equipment requiring precise per-port power control and telemetry.
FAQ
What is the maximum number of TPS2383PMR devices that can be addressed on a single I²C bus?
The TPS2383PMR features five binary address select pins (A1–A5), enabling up to 32 unique I²C addresses on one bus. This allows a single master controller to manage up to 256 PoE ports (32 × 8) using multiple TPS2383PMR devices-ideal for large-scale Ethernet switch architectures requiring centralized firmware control and telemetry aggregation.
Does the TPS2383PMR integrate power MOSFETs, or does it require external switching devices?
The TPS2383PMR does not integrate power MOSFETs. It requires external low-side N-channel MOSFETs connected to its gate drive outputs (1G–8G). This architecture enables designers to select FETs optimized for RDS(on), thermal performance, and cost-critical for high-efficiency, high-port-count PoE systems where heat dissipation must be distributed across the PCB.
How does the TPS2383PMR handle non-IEEE 802.3af legacy powered devices?
The TPS2383PMR supports capacitive detection mode for legacy loads, using its internal 12-bit A/D converter to measure load capacitance instead of resistance. When enabled via register configuration, this mode safely identifies non-compliant devices without applying damaging discovery voltages-preserving interoperability with older VoIP phones, analog cameras, and other pre-standard PoE equipment.
What is the purpose of the dual SDA lines (SDA_I and SDA_O) on the TPS2383PMR?
The TPS2383PMR separates I²C data into SDA_I (input-only) and SDA_O (open-drain output) to support opto-coupler isolation between the controller domain and the 48-V PoE side. SDA_O can directly drive opto-LEDs from the +48-V rail using an external current-limiting resistor-ensuring galvanic isolation required for UL/IEC950 safety certification without adding level-shifting ICs or complex discrete circuitry.
Can the TPS2383PMR operate without the +5-V analog supply (V5) present?
No-the +5-V analog supply (V5) is required to power the LED drivers (L1–L8) and internal analog circuits. However, the 3.3-V logic supply (VL) may remain active even when +48-V (V48) is absent, allowing continued I²C register access for configuration and status reads. The V5 rail must be present for full functionality, including port power delivery, fault monitoring, and LED status indication.
TPS2383PMR 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:
- 0°C ~ 70°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-LQFP (10x10)
TPS2383PMR FAQ
1.How can I place an order for TPS2383PMR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2383PMR 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 TPS2383PMR reliable?
The price and inventory of TPS2383PMR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2383PMR is usually 5 days.
3.What payment methods are accepted for TPS2383PMR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2383PMR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2383PMR?
TPS2383PMR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2383PMR 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 TPS2383PMR?
For technical support, including TPS2383PMR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2383PMR requirements.
6.How does Aetrix verify that TPS2383PMR is sourced from the original manufacturer or authorized distributors?
All TPS2383PMR 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 TPS2383PMR meets industry standards.
7.What is the process for return or replacement of TPS2383PMR?
All TPS2383PMR units undergo pre-shipment inspection (PSI). If there is an issue with TPS2383PMR, 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 TPS2383PMR part is unused and in its original packaging.
Return procedure for TPS2383PMR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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