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Texas Instruments TPS2383BPMG4
- Part No.:
- TPS2383BPMG4
- Manufacturer:
- Texas Instruments
- Category:
- Power Over Ethernet (PoE) Controllers
- Package:
- 64-LQFP
- Datasheet:
-
TPS2383BPMG4.pdf
- Description:
- IC OCTAL POWER MANAGER 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:343
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Product details
Overview
TPS2383BPMG4 from Texas Instruments is an IEEE 802.3af-compliant octal Power Sourcing Equipment Manager (PSEPM) IC for PoE mid-span injectors and switches. It manages up to eight Ethernet ports with per-port discovery, classification, controlled di/dt power ramping, real-time 12-bit current/voltage acquisition, and hardware FAULT interrupt. It operates from a 44–57 V input and supports opto-coupled I²C isolation for system ground separation.
For engineers reviewing the TPS2383BPMG4 datasheet, TPS2383BPMG4 pinout, TPS2383BPMG4 application, or TPS2383BPMG4 equivalent, key selection considerations include its LQFP-64 package, dual SDA lines for isolated I²C control, external N-channel MOSFET gate drive capability, 25-kΩ resistor discovery compliance, and integrated LED drivers for port status indication.
Technical Context
The TPS2383BPMG4 implements a master sequencer with eight independent port state machines, enabling time-sliced per-port management of discovery, classification, and powered states. Its shared analog resources include a 12-bit A/D converter with 8:1 MUX, CINT-based integration for resistance/capacitance measurement, and CR/CT-timed ramp control for EMI-reduced di/dt slew.
It uses external 0.5-Ω sense resistors (RS pins) and 665-Ω discovery resistors (RD), with precision bias set by RT (120 kΩ). Gate drive outputs (G pins) deliver up to 10 V to external N-MOSFETs, while dual SDA_I/SDA_O pins support opto-isolated I²C communication without level shifters.
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 full per-port register control and monitoring. |
| Input Voltage Range | 44 V to 57 V on V48 pin - supports standard 48-V PoE infrastructure with ±10% tolerance. |
| A/D Resolution | 12-bit port current and voltage acquisition - enables real-time load monitoring and fault diagnostics. |
| I²C Interface | Standard slave-mode I²C with separate SDA_I and SDA_O pins - allows opto-coupler isolation for ground-separated controller designs. |
| Discovery Method | Two-point 25-kΩ resistor detection with capacitive legacy load support - ensures safe identification of both compliant and non-compliant PDs. |
| Power Ramp Control | Controlled di/dt ramp-up/down via CR capacitor - reduces EMI during power application and removal. |
Pinout & Package
The TPS2383BPMG4 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 SLUS565G datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V48 | +48 V Input Supply | Main PoE power rail input (44–57 V); powers internal HV gate driver and analog circuits. |
| 1P–8P, 1N–8N | Port Sense Terminals | Differential high-side (+) and low-side (–) sense inputs for each of 8 PoE ports. |
| 1G–8G | N-MOSFET Gate Drivers | Linear current-controlled outputs driving external low-side N-channel MOSFET gates. |
| 1RS–8RS | Kelvin Current Sense Inputs | High-precision sense path for 0.5-Ω external current-sense resistors per port. |
| L1–L8 | Tri-State LED Drivers | Configurable dual-color LED outputs with 10-mA drive strength for port status indication. |
| SCL_I, SDA_I, SDA_O | I²C Interface Signals | Isolated clock input and bidirectional data paths - SDA_O supports direct opto-LED drive from 48-V bus. |
| INTB | Open-Drain Fault Interrupt | Active-low signal asserting on any port fault (UV/OV/OC/undercurrent/disconnect). |
| AG1, AG2, DG, RG | Analog/Digital Grounds | Separate analog grounds (AG1/AG2/RG) minimize noise coupling; RG serves as guard ring for CINT/RS. |
Key Features
| Feature | Design Value |
|---|---|
| Opto-Coupler Compatible I²C | Separated SDA_I and SDA_O pins enable galvanic isolation without external level shifters or buffers. |
| Per-Port Programmable States | Independent discovery/classification/power-enable control per port via I²C write registers. |
| Real-Time 12-Bit Monitoring | Continuous acquisition of port current and voltage - accessible via I²C read registers for system telemetry. |
| Hardware FAULT Interrupt | INTB pin asserts immediately on UV/OV/OC/undercurrent/fault events - enables fast system-level response. |
| Dual-Color LED Status Outputs | L1–L8 pins support tri-state control of bi-color LEDs - provides visual port state feedback without MCU GPIO overhead. |
| Controlled di/dt Power Ramp | CR capacitor sets linear current ramp rate - limits EMI and inrush stress on PD bulk capacitance during startup. |
Applications
| Mid-Span PoE Injector | PoE Switch Management |
|---|---|
Use Scenario: Standalone device inserting 48-V power onto existing Ethernet cabling between switch and endpoint. IC Role / Device Role / Timing Role: PSEPM managing all eight ports' discovery, classification, and power delivery sequencing under host microcontroller control. Use Value: Enables compact, scalable injector designs with real-time port current monitoring and hardware fault interrupt - reducing firmware complexity and improving system reliability. |
Use Scenario: Integrated into enterprise or industrial Ethernet switches to add PoE capability across multiple RJ-45 ports. IC Role / Device Role / Timing Role: Centralized power manager coordinating per-port state machines and feeding telemetry to switch CPU via I²C. Use Value: Supports dynamic power budgeting and remote diagnostics using 12-bit A/D data - critical for intelligent power allocation in multi-port deployments. |
| Legacy Device Detection System | Industrial PoE Infrastructure |
Use Scenario: Retrofitting PoE to older VoIP phones or IP cameras lacking IEEE 802.3af signature resistors. IC Role / Device Role / Timing Role: Uses capacitive detection mode and programmable classification bypass to identify and safely power non-compliant loads. Use Value: Extends PoE deployment flexibility without requiring end-device redesign - verified via RD/CD circuitry and A/D-based capacitance measurement. |
Use Scenario: Factory automation or building management systems requiring robust, field-serviceable PoE endpoints. IC Role / Device Role / Timing Role: Provides UL/IEC950 SELV-compliant power control with PTC fuse interface and hardware fault shutdown. Use Value: Meets safety certification requirements through integrated UVLO, OV/UV protection, and self-resetting fault handling - minimizing external protection components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PoE PSE management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2384PWR | Quad-port variant in TSSOP-48; lacks dual SDA lines and LED drivers; lower channel count but smaller footprint. | Targeted at space-constrained 4-port injectors where isolation and visual indicators are secondary. | Select when port count and board area are prioritized over isolation flexibility and status visibility. |
| MAX5974AETJ+ | 4-port PoE controller with integrated MOSFET drivers; no external FET requirement; no 12-bit A/D or LED drivers. | Used in cost-sensitive, lower-channel-count applications where integrated FET simplifies BOM but telemetry is limited. | Choose when simplified layout and reduced external component count outweigh need for per-port A/D monitoring and optical isolation. |
Compared with TPS2383BPMG4, the TPS2384PWR offers half the port density and no opto-isolation support, while the MAX5974AETJ+ integrates power switches but sacrifices real-time telemetry and visual status - making TPS2383BPMG4 optimal for scalable, monitored, and isolated 8-port PoE systems.
Availability
TPS2383BPMG4 is available at Aetrix Electronics and suitable for PoE mid-span injectors, enterprise Ethernet switches, and industrial infrastructure requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS2383BPMG4 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 and PoE solutions.
The TPS2383BPMG4 belongs to TI's Power over Ethernet (PoE) PSE controller product line, designed specifically for scalable, standards-compliant, and software-managed Ethernet power infrastructure in enterprise and industrial networks.
FAQ
What is the primary function of the TPS2383BPMG4 in a PoE system?
The TPS2383BPMG4 serves as an octal Power Sourcing Equipment Manager (PSEPM) that discovers, classifies, and delivers power to IEEE 802.3af-compliant Powered Devices over Ethernet cabling. It manages all eight ports independently via I²C, performs real-time 12-bit current/voltage monitoring, and drives external N-MOSFETs for precise power control - making it central to mid-span injectors and managed PoE switches.
Does the TPS2383BPMG4 integrate power MOSFETs, or does it require external switching devices?
The TPS2383BPMG4 does not integrate power MOSFETs. It provides dedicated gate drive outputs (1G–8G pins) to control external low-side N-channel MOSFETs, enabling design flexibility and thermal optimization. This architecture allows selection of ultra-low RDS(on) FETs to minimize conduction losses - a key advantage in high-port-count systems where heat dissipation is critical.
How does the TPS2383BPMG4 support system-level ground isolation in PoE applications?
The TPS2383BPMG4 supports ground isolation via separate SDA_I and SDA_O pins, allowing direct connection to opto-coupler LEDs without level-shifting circuitry. SDA_O can be driven from the 48-V bus using an external current-limiting resistor, maintaining galvanic separation between the 48-V PoE domain and the grounded microcontroller - a feature explicitly highlighted in TI's SLUS565G datasheet.
What is the role of the CR, CT, and CINT pins on the TPS2383BPMG4?
The CR pin controls di/dt ramp timing during power-up/down using a 0.1-µF capacitor; CT sets the internal clock frequency (100–500 kHz) with a 120-kΩ RT resistor; CINT integrates A/D conversion signals with a 0.033-µF capacitor referenced to RG. These three pins collectively govern power sequencing accuracy, state machine timing, and measurement fidelity - all essential for IEEE 802.3af compliance.
Can the TPS2383BPMG4 detect and power non-IEEE 802.3af-compliant devices?
Yes. The TPS2383BPMG4 supports legacy device detection via capacitive sensing mode, enabled through register configuration. It uses its integrated 12-bit A/D to measure load capacitance during discovery - allowing safe identification and powering of non-compliant devices such as older VoIP phones, without risking damage from standard 25-kΩ resistor probing.
TPS2383BPMG4 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)
TPS2383BPMG4 FAQ
1.How can I place an order for TPS2383BPMG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2383BPMG4 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 TPS2383BPMG4 reliable?
The price and inventory of TPS2383BPMG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2383BPMG4 is usually 5 days.
3.What payment methods are accepted for TPS2383BPMG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2383BPMG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2383BPMG4?
TPS2383BPMG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2383BPMG4 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 TPS2383BPMG4?
For technical support, including TPS2383BPMG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2383BPMG4 requirements.
6.How does Aetrix verify that TPS2383BPMG4 is sourced from the original manufacturer or authorized distributors?
All TPS2383BPMG4 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 TPS2383BPMG4 meets industry standards.
7.What is the process for return or replacement of TPS2383BPMG4?
All TPS2383BPMG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS2383BPMG4, 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 TPS2383BPMG4 part is unused and in its original packaging.
Return procedure for TPS2383BPMG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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