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Texas Instruments TPS2372-3RGWT
- Part No.:
- TPS2372-3RGWT
- Manufacturer:
- Texas Instruments
- Category:
- Power Over Ethernet (PoE) Controllers
- Package:
- 20-VQFN Exposed Pad
- Datasheet:
-
TPS2372-3RGWT.pdf
- Description:
- IC POE CNTRL 1 CHANNEL 20VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,009
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Product details
Overview
TPS2372-3RGWT from Texas Instruments is a IEEE 802.3bt-compliant Type-3 Powered Device (PD) interface IC with integrated 0.3-Ω hot-swap MOSFET, 1.85-A current limit, automatic Maintain Power Signature (MPS), and autoclass support - enabling 60-W PoE++ operation in lighting, security cameras, and multiband access points.
For engineers reviewing the TPS2372-3RGWT datasheet, TPS2372-3RGWT pinout, TPS2372-3RGWT application, or TPS2372-3RGWT equivalent, key selection criteria include PoE++ Type-3 power classification accuracy, MPS duty-cycle programmability via AMPS_CTL and MPS_DUTY pins, thermal shutdown at 158°C, and VQFN-20 package compatibility with high-density PoE PD layouts.
Technical Context
The TPS2372-3RGWT implements full IEEE 802.3bt Type-3 PD functionality: detection (1.4–10.1 V range), two-event hardware classification using CLSA/CLSB resistors, and inrush current limiting (200 mA typical). Its internal pass FET features 0.3-Ω rDS(on) and supports 1.55–2.2 A continuous current under thermal regulation.
Automatic MPS generation is triggered when RTN current falls below 18–38 mA, with duty cycle selectable via external resistor on MPS_DUTY (5.4%, 8.1%, or 12.5%). Autoclass is enabled by pulling AUTCLS low during first classification event, signaling PSE support for dynamic power negotiation per IEEE 802.3bt draft standard.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IEEE Standard Compliance | IEEE 802.3bt Type-3 (60 W), backward-compatible with 802.3at/af |
| Max Continuous Power | 60 W at PSE; ~51 W delivered to load over 100 m CAT5 cable |
| Pass FET rDS(on) | 0.3 Ω typical - enables low conduction loss and <1.5 W dissipation at 1.85 A |
| Current Limit | 1.85 A typical (1.55–2.2 A range) - sets maximum safe load current before foldback |
| Operating Temperature | –40°C to +125°C junction - supports industrial and outdoor PoE deployments |
| UVLO Threshold | 38.1 V rising / 32 V falling - ensures stable startup above PoE minimum and graceful shutdown |
| MPS Duty Cycle Options | 5.4% (Type 3–4), 8.1% (mid-range), or 12.5% (Type 1–2) - selected by resistor on MPS_DUTY |
Pinout & Package
TPS2372-3RGWT uses a 20-pin VQFN (RGW) package with 5.0 mm × 5.0 mm body and exposed thermal pad connected to VSS for enhanced heat dissipation. Pin 1 is top-left corner (VDD), pin numbering follows counter-clockwise sequence.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | PoE input rail connection | Accepts 0–57 V PoE input; bypassed to VSS with 0.1 µF capacitor |
| DEN | Detection signature & enable control | 24.9 kΩ to VDD enables detection; pulled to VSS disables MOSFET |
| CLSA / CLSB | Classification current programming | Resistors to VSS set Class A/B signature (e.g., 90.9 Ω = Class 3) |
| AMPS_CTL | Automatic MPS amplitude control | Resistor to VSS programs MPS pulsed current (1–12 kΩ = 23.1–24.9 V pulse) |
| MPS_DUTY | MPS duty cycle selection | Resistor to VSS selects 5.4%/8.1%/12.5% duty cycle for Type 3–4/intermediate/Type 1–2 PSEs |
| AUTCLS | Autoclass enable input | Pull low during first classification event to signal IEEE 802.3bt autoclass capability |
| PG | Power Good indicator | Open-drain active-high output with 81.5 ms inrush delay - used to enable downstream DC/DC converter |
| RTN | Pass FET drain return | High-current path (1.85 A max) from load back to controller; connects to exposed thermal pad |
| TPH / TPL / BT | PSE type identification outputs | Open-drain active-low signals indicating IEEE 802.3bt Type-3/4 or mutual identification detection |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Hot-Swap MOSFET | 0.3-Ω rDS(on), 100-V rating - eliminates external FET and reduces BOM count in Type-3 PD designs |
| Automatic MPS Generation | Self-adjusting pulsed current (18–38 mA threshold) with three programmable duty cycles - enables ultra-low standby power without external timing circuitry |
| Autoclass Support | Hardware-enabled via AUTCLS pin - allows dynamic power negotiation with IEEE 802.3bt Type-3/4 PSEs during classification phase |
| Inrush Delay & Foldback | 81.5 ms fixed inrush delay + 1.65 ms deglitch time - ensures compliance with IEEE 802.3bt startup timing and prevents false current-limit trips |
| Robust Protection Suite | Thermal shutdown (158°C), UVLO (38.1 V rise), and current-limit foldback - maintains reliability across industrial temperature and voltage transients |
Applications
| LED Lighting Systems | Security Cameras |
|---|---|
Use Scenario: High-efficiency PoE-powered LED luminaires with dimming and sleep/wake control via MCU. IC Role / Device Role / Timing Role: PD interface managing PoE detection, classification, MPS maintenance, and PG-controlled DC/DC enable. Use Value: Enables 60-W power delivery with automatic MPS for <100 µA standby current - meeting Energy Star and DLC requirements. |
Use Scenario: Outdoor IP67-rated PTZ security camera with IR illumination and video streaming over single Ethernet cable. IC Role / Device Role / Timing Role: Type-3 PD controller providing robust inrush handling, autoclass negotiation, and PSE-type indication (BT/TPH). Use Value: Sustains 51 W delivered power over 100 m CAT5 while supporting IEEE 802.3bt mutual identification for secure PSE-PD pairing. |
| Multiband Wi-Fi Access Points | Pass-Through PoE Systems |
Use Scenario: Dual-band 802.11ac/ax AP with integrated switch supporting upstream/downstream PoE ports. IC Role / Device Role / Timing Role: Primary PD interface coordinating classification with secondary PDs via shared CLSA/CLSB configuration. Use Value: Delivers precise 60-W allocation using two-class event sequencing and supports autoclass for adaptive power budgeting across RF chains. |
Use Scenario: Industrial gateway aggregating sensors and forwarding PoE power to downstream devices. IC Role / Device Role / Timing Role: Midspan PD controller managing input PoE, local load, and output PoE passthrough with independent MPS control. Use Value: Maintains stable 60-W input while enabling concurrent downstream PD operation via coordinated PG and TPL signaling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PoE PD interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2372-4RGWT | 0.1-Ω rDS(on), 2.2-A current limit, supports 90-W Type-4 operation | Higher power ceiling (90 W vs. 60 W); requires larger PCB copper and thermal management | Select for systems needing >60 W delivered power or future-proofing against Type-4 PSE upgrades |
| LT4295IMS#PBF | IEEE 802.3bt-compliant, 0.25-Ω FET, 2.1-A limit, integrated DC/DC controller | Includes synchronous buck controller - reduces external component count but increases design complexity | Choose when integrating isolated DC/DC conversion is preferred over discrete controller architecture |
Compared with TPS2372-4RGWT, the TPS2372-3RGWT offers lower conduction loss at 60-W loads and reduced thermal stress, while LT4295IMS#PBF trades off pin count and layout simplicity for integrated power conversion - making TPS2372-3RGWT optimal for discrete, thermally constrained, or cost-sensitive Type-3 PD implementations.
Availability
TPS2372-3RGWT is available at Aetrix Electronics and suitable for LED lighting systems, security cameras, multiband access points, pass-through PoE gateways, and industrial IoT edge nodes requiring stable component supply and long-term lifecycle support.
Supply support for TPS2372-3RGWT 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 and embedded processing technologies, with leadership in power management, signal chain, and connectivity solutions.
The TPS2372 product line delivers IEEE 802.3bt-compliant PoE PD interfaces optimized for high-efficiency, thermally robust, and feature-rich powered device implementations in lighting, surveillance, and wireless infrastructure.
FAQ
What is the maximum continuous power supported by the TPS2372-3RGWT?
The TPS2372-3RGWT supports up to 60 W of continuous power from an IEEE 802.3bt Type-3 PSE. Accounting for 100-meter CAT5 cable losses, it delivers approximately 51 W to the load. This is enabled by its 0.3-Ω internal MOSFET and 1.85-A current limit, ensuring efficient operation within thermal limits across –40°C to +125°C junction temperatures.
How does the automatic MPS function work on the TPS2372-3RGWT?
The TPS2372-3RGWT automatically generates the Maintain Power Signature when RTN current drops below 18–38 mA. It pulses current through AMPS_CTL with duty cycle selected via MPS_DUTY resistor (5.4% for Type 3–4, 8.1% for mid-range, 12.5% for Type 1–2 PSEs). This eliminates external timers or microcontrollers, enabling ultra-low standby power without compromising PSE recognition.
What is the purpose of the AUTCLS pin on the TPS2372-3RGWT?
The AUTCLS pin on the TPS2372-3RGWT enables IEEE 802.3bt autoclass functionality. When pulled low during the first classification event, it causes the device to drop its classification current to Class 0 level after 76–87 ms, signaling to a Type-3 or Type-4 PSE that the PD supports dynamic power negotiation. This allows the PSE to allocate power based on real-time system needs rather than fixed class assumptions.
Can the TPS2372-3RGWT be used with legacy 802.3af/at PSEs?
Yes, the TPS2372-3RGWT is fully backward-compatible with IEEE 802.3af and 802.3at PSEs. Its detection and classification circuitry meets all legacy requirements, and its automatic MPS adapts to Type 1–2 PSEs using the 12.5% duty cycle mode. The device operates identically in legacy mode - delivering up to 30 W (802.3at) or 15.4 W (802.3af) - with no configuration changes required.
What thermal considerations apply to the TPS2372-3RGWT in a 60-W PD design?
The TPS2372-3RGWT has a junction-to-board thermal resistance (RθJB) of 17.9°C/W in the RGW package. At 1.85 A and 0.3 Ω, conduction loss is ~1.03 W; combined with quiescent power (~0.8 mW), total dissipation remains under 1.1 W. With proper PCB copper pour on the exposed thermal pad and 2 oz. copper layers, junction temperature stays well below the 158°C shutdown threshold even at +125°C ambient.
TPS2372-3RGWT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-VQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Controller (PD)
- Number of Channels:
- 1
- Power - Max:
- 60 W
- Internal Switch(s):
- Yes
- Auxiliary Sense:
- No
- Standards:
- 802.3at (PoE+), 802.3bt
- Voltage - Supply:
- 0V ~ 57V
- Current - Supply:
- 550µA
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-VQFN (5x5)
TPS2372-3RGWT FAQ
1.How can I place an order for TPS2372-3RGWT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2372-3RGWT 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 TPS2372-3RGWT reliable?
The price and inventory of TPS2372-3RGWT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2372-3RGWT is usually 5 days.
3.What payment methods are accepted for TPS2372-3RGWT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2372-3RGWT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2372-3RGWT?
TPS2372-3RGWT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2372-3RGWT 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 TPS2372-3RGWT?
For technical support, including TPS2372-3RGWT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2372-3RGWT requirements.
6.How does Aetrix verify that TPS2372-3RGWT is sourced from the original manufacturer or authorized distributors?
All TPS2372-3RGWT 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 TPS2372-3RGWT meets industry standards.
7.What is the process for return or replacement of TPS2372-3RGWT?
All TPS2372-3RGWT units undergo pre-shipment inspection (PSI). If there is an issue with TPS2372-3RGWT, 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 TPS2372-3RGWT part is unused and in its original packaging.
Return procedure for TPS2372-3RGWT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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