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Texas Instruments TPS2383APMG4
- Part No.:
- TPS2383APMG4
- Manufacturer:
- Texas Instruments
- Category:
- Power Over Ethernet (PoE) Controllers
- Package:
- 64-LQFP
- Datasheet:
-
TPS2383APMG4.pdf
- Description:
- IC OCTAL POWER MANAGER 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,208
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Product details
Overview
TPS2383APMG4 from Texas Instruments is an IEEE 802.3af-compliant Power Sourcing Equipment (PSE) power manager for Ethernet-based PoE systems. It manages up to eight PoE ports, performs two-point 25-kΩ discovery, capacitive legacy load detection, 12-bit per-port current/voltage acquisition, and controlled di/dt ramp-up/down. It operates with 44–57 V input, supports I²C slave interface with 5-bit address selectability, and drives external N-channel MOSFETs for port switching.
For engineers reviewing the TPS2383APMG4 datasheet, TPS2383APMG4 pinout, TPS2383APMG4 application, or TPS2383APMG4 equivalent, key selection considerations include IEEE 802.3af compliance, per-port fault detection (UV/OV/overcurrent/undercurrent), dual-color LED status indication, opto-coupler-compatible I²C lines for ground isolation, and support for up to 256 ports via cascaded addressing.
Technical Context
The TPS2383APMG4 implements a master sequencer architecture that cycles through eight independent port state machines, coordinating shared analog resources including a 12-bit A/D converter, ramp control (CR/CT/CINT), and discovery/classification circuitry. Each port uses dedicated gate drive (1G–8G), sense (1RS–8RS), and polarity (1P/1N–8P/8N) terminals to manage external N-MOSFETs.
Its analog subsystem includes precision current-sense scaling (0.5 Ω RS resistor), programmable classification current limits (20–160 mA), discovery voltage thresholds (3.5–9.5 V), and real-time port voltage monitoring (40–63 V). Digital control is fully register-based via I²C, with separate write registers for discovery/classification bypass and read registers reporting fault status, classification value, and live current/voltage counts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IEEE Standard | Compliant with IEEE 802.3af for PoE PSE operation - enables interoperability with 802.3af PDs and defines discovery, classification, and power delivery timing. |
| Port Count | 8 independent Ethernet ports - each with full discovery, classification, power ramping, and fault protection logic. |
| Input Voltage Range | 44 V to 57 V on V48 pin - supports standard 48-V PoE midspan/supply rails with ±10% tolerance. |
| A/D Resolution | 12-bit per-port current and voltage acquisition - provides precise real-time monitoring of PD load conditions for diagnostics and thermal management. |
| I²C Interface | Standard slave I²C with 5-bit address selectability (A1–A5) - allows up to 32 devices on one bus, enabling scalable multi-chip PSE systems. |
| Gate Drive Output | Up to 10 V gate voltage with linear current amplifier - ensures full enhancement of low-RDS(on) external N-MOSFETs while controlling di/dt during ramp-up/down. |
| Fault Detection | Detects input UVLO, port UV/OV, average/peak overcurrent, undercurrent, and disconnect - triggers hardware FAULT interrupt (INTB) and updates per-port status registers. |
Pinout & Package
The TPS2383APMG4 is housed in a 64-pin LQFP (PM) package with exposed thermal pad, rated for −40°C to +85°C ambient operation. Pin functions are validated per TI SLUS565F datasheet, with dedicated analog/digital grounds (AG1, AG2, DG, RG), dual I²C data paths (SDA_I/SDA_O), and eight full port interfaces (1P–8P, 1N–8N, 1G–8G, 1RS–8RS).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V48 | +48 V input supply | Primary high-voltage rail powering port circuits and internal HV gate driver; accepts 44–57 V with UVLO at 30–38 V. |
| 1P–8P / 1N–8N | Port differential sense inputs | High- and low-side connections to Ethernet transformer center taps; used for discovery resistance, classification current, and powered-mode voltage sensing. |
| 1G–8G | N-MOSFET gate drivers | Linear current-controlled outputs driving external low-side N-channel MOSFET gates; ramp up/down controlled by CR capacitor. |
| 1RS–8RS | Kelvin current sense inputs | High-side sense terminals for 0.5 Ω shunt resistors; enable accurate per-port current measurement for overload/undercurrent detection. |
| SDA_I / SDA_O | Opto-isolated I²C data | Separate input and open-drain output pins allow direct connection to opto-couplers - maintains Ethernet port ground isolation when using system-level microcontrollers. |
| INTB | Open-drain fault interrupt | Active-low signal asserted when any port detects UV/OV/OC/fault - enables immediate host controller response without polling. |
| L1–L8 | Dual-color LED drivers | Tri-state outputs supporting single- or dual-color LEDs per port; software-controllable for status indication (discovery, powered, fault). |
Key Features
| Feature | Design Value |
|---|---|
| Two-point 25-kΩ discovery | Uses precision 25-kΩ signature detection with slope-based measurement - reliably identifies 802.3af PDs even with series steering diodes present. |
| Capacitive legacy load detection | Enables identification of non-standard PoE devices using A/D-based capacitance measurement - extends compatibility beyond IEEE-compliant equipment. |
| Controlled di/dt ramp-up/down | Reduces EMI during power application/removal by limiting slew rate via CR capacitor - meets EMC requirements in dense switch environments. |
| Electronic circuit breaker | Hardware-enforced port shutdown on UV/OV/overcurrent faults - eliminates need for external fuses while maintaining UL/IEC950 SELV compliance. |
| Per-port 12-bit A/D acquisition | Delivers real-time current (236–1416 counts @ 50–300 mA) and voltage (168–1512 counts @ 5–45 V) data - enables remote diagnostics and dynamic power budgeting. |
Applications
| Enterprise PoE Switches | Mid-Span PoE Injectors |
|---|---|
Use Scenario: 24- or 48-port managed Ethernet switches delivering PoE to IP phones, wireless APs, and security cameras in office buildings. IC Role / Device Role / Timing Role: PSE power manager handling discovery, classification, and per-port power control across all Ethernet ports. Use Value: Enables centralized power budgeting, real-time fault logging, and remote port reset - reducing OPEX for network administrators. | Use Scenario: Standalone inline injectors adding PoE capability to legacy non-PoE switches in industrial or retail settings. IC Role / Device Role / Timing Role: Independent PSE controller managing up to eight 802.3af-compliant ports with minimal host MCU intervention. Use Value: Supports hot-swap insertion, automatic legacy device detection, and UL-compliant fault clearing - simplifying field deployment. |
| Smart Building Controllers | IoT Edge Gateways |
Use Scenario: Building automation gateways powering PoE-enabled sensors, door controllers, and lighting nodes across distributed HVAC zones. IC Role / Device Role / Timing Role: Integrated PSE subsystem providing isolated, monitored power to edge devices with secure I²C communication. Use Value: Delivers ground-isolated I²C (via SDA_I/SDA_O), dual-color LED status, and per-port voltage/current telemetry - improving system reliability and serviceability. | Use Scenario: Compact industrial IoT gateways aggregating data from PoE-powered environmental sensors and actuators in harsh environments. IC Role / Device Role / Timing Role: Low-quiescent-power PSE manager operating from 48-V rail with 3.3-V digital and 5-V analog supplies derived onboard. Use Value: Achieves <5 mA quiescent current in powered mode and supports self-resetting PTC fuse integration - meeting stringent power and safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PoE PSE applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2384PWR | 4-port variant with identical architecture, same LQFP-64 package, and compatible register map - lacks two port interfaces and associated pins. | Suitable for cost-sensitive 4-port designs where full 8-port density is unnecessary; shares same firmware base but requires pin count reduction. | Select when system scale is fixed at ≤4 ports and board space or BOM cost optimization is prioritized over future expansion headroom. |
| MAX5980GTJ+ | 8-port IEEE 802.3af PSE PM with integrated MOSFET drivers and 10-bit A/D - no separate SDA_I/SDA_O isolation support; uses single bidirectional SDA. | Targeted at compact, lower-cost PoE systems where ground isolation is not required; lacks dual-color LED drivers and has reduced A/D resolution. | Choose when optical isolation is unnecessary and simplified layout outweighs loss of diagnostic granularity and status visibility. |
Compared with TPS2383APMG4, TPS2384PWR reduces port count and pin count while retaining full functional equivalence per active port, whereas MAX5980GTJ+ trades isolation capability and LED flexibility for integration density and lower component count - making TPS2383APMG4 optimal for scalable, serviceable, and safety-isolated PoE infrastructure.
Availability
TPS2383APMG4 is available at Aetrix Electronics and suitable for enterprise PoE switches, mid-span injectors, and smart building controllers requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial deployments.
Supply support for TPS2383APMG4 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 connectivity technologies, with leadership in power management and industrial interface solutions.
The TPS2383A/B product line was designed specifically for IEEE 802.3af Power over Ethernet infrastructure, targeting high-density, scalable, and safety-certifiable PSE implementations in networking and building automation systems.
FAQ
What is the primary function of the TPS2383APMG4 in a PoE system?
The TPS2383APMG4 serves as a Power Sourcing Equipment (PSE) power manager compliant with IEEE 802.3af. It discovers, classifies, and safely delivers power to Powered Devices (PDs) over Ethernet cabling. The TPS2383APMG4 manages up to eight PoE ports, performs real-time current/voltage monitoring via its 12-bit A/D, and enforces fault protection including UV/OV/overcurrent detection - all coordinated through an I²C interface.
Does the TPS2383APMG4 support optical isolation for the I²C interface?
Yes, the TPS2383APMG4 supports optical isolation for the I²C interface using separate SDA_I and SDA_O pins. This allows direct connection to opto-coupler LEDs without level-shifting circuitry, preserving ground isolation between the host controller and PoE ports. The TPS2383APMG4's SDA_O pin is a high-voltage open-drain output capable of driving opto-couplers directly from the +48-V bus with an external current-limiting resistor.
How does the TPS2383APMG4 handle legacy non-802.3af devices?
The TPS2383APMG4 supports capacitive detection for legacy loads, using its integrated A/D converter to measure load capacitance during discovery. This enables identification and safe power delivery to non-compliant devices without risking damage. The TPS2383APMG4 also allows discovery and/or classification bypass modes via register configuration, permitting custom detection schemes tailored to proprietary or pre-standard equipment.
What package type and thermal characteristics does the TPS2383APMG4 use?
The TPS2383APMG4 is packaged in a 64-pin LQFP (PM) with exposed thermal pad, rated for −40°C to +85°C ambient operation. Its thermal resistance is θJA = 65°C/W and θJC = 9°C/W. At 25°C ambient, maximum power dissipation is 1.5 W, derating linearly at 15.4 mW/°C above 25°C - reaching 615 mW at 85°C. This enables reliable operation in thermally constrained switch chassis without forced airflow.
Can the TPS2383APMG4 be used in systems requiring UL or IEC950 safety certification?
Yes, the TPS2383APMG4 supports designs compliant with Underwriters Laboratory (UL), IEC950 SELV, and NEMKO safety standards. Its architecture enables optional integration of a low-cost self-resetting PTC fuse on the unswitched +48-V line to protect against secondary wiring faults. Combined with electronic circuit breaking, controlled ramping, and isolation-capable I²C, the TPS2383APMG4 facilitates certified PoE infrastructure meeting stringent safety requirements.
TPS2383APMG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 64-LQFP
- Packaging:
- Tray
- Product Status:
- Active
- 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)
TPS2383APMG4 FAQ
1.How can I place an order for TPS2383APMG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2383APMG4 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 TPS2383APMG4 reliable?
The price and inventory of TPS2383APMG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2383APMG4 is usually 5 days.
3.What payment methods are accepted for TPS2383APMG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2383APMG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2383APMG4?
TPS2383APMG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2383APMG4 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 TPS2383APMG4?
For technical support, including TPS2383APMG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2383APMG4 requirements.
6.How does Aetrix verify that TPS2383APMG4 is sourced from the original manufacturer or authorized distributors?
All TPS2383APMG4 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 TPS2383APMG4 meets industry standards.
7.What is the process for return or replacement of TPS2383APMG4?
All TPS2383APMG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS2383APMG4, 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 TPS2383APMG4 part is unused and in its original packaging.
Return procedure for TPS2383APMG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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