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Texas Instruments TPS2372-3RGWR
- Part No.:
- TPS2372-3RGWR
- Manufacturer:
- Texas Instruments
- Category:
- Power Over Ethernet (PoE) Controllers
- Package:
- 20-VQFN Exposed Pad
- Datasheet:
-
TPS2372-3RGWR.pdf
- Description:
- IC POE CNTRL 1 CHANNEL 20VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,573
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Product details
Overview
TPS2372-3RGWR 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 for PoE++ systems. It delivers up to 60 W at PD input (51 W after 100-m CAT5 loss) in lighting, security cameras, and multiband access points.
For engineers reviewing the TPS2372-3RGWR datasheet, TPS2372-3RGWR pinout, TPS2372-3RGWR application, or TPS2372-3RGWR equivalent, key selection criteria include PoE classification signature programmability (CLSA/CLSB), MPS duty cycle control (MPS_DUTY), PG timing compliance with PSE inrush, thermal shutdown at 158°C, and VQFN-20 package compatibility with high-density PoE PD layouts.
Technical Context
The TPS2372-3RGWR implements full IEEE 802.3bt Type-3 PD functionality including detection (DEN), dual-stage classification (CLSA/CLSB), inrush current limiting (200 mA typ.), and robust 100-V hot-swap MOSFET control. Its internal architecture integrates UVLO (38.1 V rising), foldback protection, and autoclass enable (AUTCLS) for dynamic power negotiation.
Automatic MPS generation is controlled via AMPS_CTL resistor programming and MPS_DUTY pin selection (5.4%, 8.1%, or 12.5% duty), enabling ultra-low standby power modes without external timers. The PG output provides inrush-compliant delay (~81.5 ms) before asserting, ensuring PSE startup sequence compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IEEE Standard | Complies with IEEE 802.3bt Type-3 (60 W) PD specification, including detection, classification, and MPS requirements. |
| Current Limit | 1.85 A typical; ensures safe operation under sustained load while supporting 51 W delivered power over CAT5 cable. |
| MOSFET RDS(on) | 0.3 Ω typical; minimizes conduction loss and thermal rise in high-power PoE applications. |
| Operating Temp | –40°C to +125°C junction range; supports industrial and outdoor deployments including security cameras and LED lighting. |
| UVLO Threshold | 38.1 V rising / 32 V falling; prevents erratic startup during PoE voltage ramp-up and ensures clean shutdown during brownout. |
| Inrush Delay | 81.5 ms typical; satisfies IEEE 802.3bt PSE inrush completion timing before PG assertion. |
| MPS Duty Cycle | Selectable 5.4% (Type 1–2), 8.1% (mid-range), or 12.5% (Type 3–4); enables adaptive power signature for multi-PSE environment interoperability. |
Pinout & Package
The TPS2372-3RGWR is housed in a 5.0 mm × 5.0 mm, 20-pin VQFN (RGW) package with exposed thermal pad connected to VSS for enhanced heat dissipation in high-power PoE PD designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | PoE input rail connection | Bypassed to VSS with 0.1 µF capacitor; supplies internal bias and gate drive for hot-swap MOSFET. |
| DEN | Detection signature & enable control | 24.9 kΩ resistor to VDD sets detection resistance; pulled to VSS disables pass MOSFET during operation. |
| CLSA / CLSB | Classification current programming | Resistors to VSS set Class A/B signatures per IEEE 802.3bt; determine allocated power level (e.g., 63.4 Ω = Class 4). |
| AMPS_CTL | Automatic MPS amplitude control | Resistor to VSS programs pulsed MPS current amplitude; open disables MPS function. |
| MPS_DUTY | MPS duty cycle selection | Resistor to VSS selects 5.4%, 8.1%, or 12.5% duty cycle; open = 5.4%, short = 12.5%. |
| AUTCLS | Autoclass enable input | Pulled low to VSS during classification enables autoclass signature (Class 0 drop after tACS) for Type 3/4 PSEs. |
| PG | Power Good indicator | Open-drain output referenced to RTN; asserts after inrush delay completes; used to enable downstream DC/DC converter. |
| RTN | Pass MOSFET drain return | High-current path from load back to controller; connects to MOSFET drain and must be routed with low-inductance layout. |
| TPH / TPL / BT | PSE type identification outputs | Open-drain, active-low signals indicating IEEE 802.3bt Type-3/4 PSE detection; used for system-level power mode selection. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic MPS generation | Eliminates need for external timer circuitry; adapts duty cycle and amplitude based on PSE type (Type 1–2 vs. 3–4) and load current. |
| Autoclass support | Enables advanced power negotiation by dropping classification current to Class 0 after tACS (81.5 ms), signaling Type 3/4 PSE compatibility. |
| Programmable classification | Independent CLSA/CLSB resistors allow precise power class selection (Class 0–8) per IEEE 802.3bt Table 1, supporting multi-cycle allocation. |
| Robust thermal protection | Thermal shutdown at 158°C with 20°C hysteresis prevents latch-up; combined with RθJA = 40.2°C/W (VQFN) enables reliable 60-W operation. |
| Integrated inrush delay | Fixed ~81.5 ms delay ensures PG assertion aligns with PSE inrush completion, eliminating need for external RC timing networks. |
Applications
| LED Lighting Systems | Security Cameras |
|---|---|
Use Scenario: Outdoor or industrial LED luminaires powered via PoE++ infrastructure with remote dimming and sleep/wake control. IC Role / Device Role / Timing Role: PD interface managing detection, classification, MPS maintenance, and PG-controlled DC/DC enable for LED driver. Use Value: Enables 60-W continuous power delivery with ultra-low standby consumption via automatic MPS, reducing energy waste in unoccupied periods. | Use Scenario: High-resolution IP security cameras with IR illumination, pan-tilt-zoom, and edge analytics requiring stable PoE power and thermal resilience. IC Role / Device Role / Timing Role: Primary PD controller handling IEEE 802.3bt Type-3 negotiation, inrush management, and thermal-safe operation in enclosed housings. Use Value: 125°C max junction temperature and 0.3-Ω RDS(on) ensure reliable operation in thermally constrained enclosures without derating. |
| Multiband Wi-Fi Access Points | Pass-through PoE Systems |
Use Scenario: Dual- or tri-band enterprise APs with integrated switching, requiring high-efficiency PoE input and deterministic power sequencing. IC Role / Device Role / Timing Role: PD front-end providing PG-synchronized enable for RF SoC and baseband power rails, plus TPH/TPH/BT status for firmware power policy decisions. Use Value: Binary-coded TPH/TPH/BT outputs allow firmware to select optimal DC/DC operating modes (e.g., boost vs. buck) based on negotiated PSE capability. | Use Scenario: PoE-powered network switches or extenders that receive PoE on one port and re-deliver it to downstream devices. IC Role / Device Role / Timing Role: Primary PD interface on upstream port, coordinating with secondary PD controllers on downstream ports via shared classification logic. Use Value: Autoclass and programmable CLSA/CLSB enable coordinated multi-port power budgeting without PSE oversubscription. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PoE PD interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2372-4RGWR | 0.1-Ω RDS(on), 2.2-A current limit, supports 90-W Type-4 operation; identical pinout and feature set. | Required for >60-W applications (e.g., high-power APs, PTZ cameras with heaters); not suitable where 60-W ceiling is mandated. | Select TPS2372-4RGWR only when PSE guarantees Type-4 power and system load exceeds 51 W delivered. |
| LT4275AIMSE#PBF | IEEE 802.3at/af compliant (Type 2/1), 25.5-W max; no autoclass or MPS_DUTY control; different pinout and classification scheme. | Suitable for legacy PoE+ systems but lacks IEEE 802.3bt Type-3 features; requires redesign of classification and MPS circuitry. | Use LT4275AIMSE#PBF only for cost-sensitive, lower-power applications where Type-3 compliance is unnecessary. |
Compared with TPS2372-4RGWR, the TPS2372-3RGWR offers optimized conduction loss and thermal margin for 60-W systems, while LT4275AIMSE#PBF requires board-level changes and sacrifices Type-3 interoperability, making TPS2372-3RGWR the precise fit for new IEEE 802.3bt infrastructure deployments.
Availability
TPS2372-3RGWR is available at Aetrix Electronics and suitable for LED lighting systems, security cameras, multiband access points, and pass-through PoE systems requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for TPS2372-3RGWR 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 and communications portfolio coverage.
The TPS2372 product line delivers IEEE 802.3bt-compliant Powered Device interfaces for next-generation PoE++ infrastructure, targeting high-reliability, high-efficiency applications in smart buildings, surveillance, and wireless networking.
FAQ
What is the maximum continuous power supported by the TPS2372-3RGWR?
The TPS2372-3RGWR supports up to 60 W of continuous power sourced by an IEEE 802.3bt Type-3 PSE. Accounting for 100-meter CAT5 cable losses, this delivers approximately 51 W at the PD input. This rating is enabled by its 0.3-Ω RDS(on) and 1.85-A current limit, validated across –40°C to +125°C junction temperature.
How does the TPS2372-3RGWR implement automatic Maintain Power Signature (MPS)?
The TPS2372-3RGWR implements automatic MPS using internal circuitry that monitors RTN current and triggers pulsed current generation via AMPS_CTL when load current drops below 18–38 mA. MPS duty cycle (5.4%, 8.1%, or 12.5%) is selected by resistor value on MPS_DUTY, and amplitude is set by resistor on AMPS_CTL - all without external timing components.
What is the purpose of the AUTCLS pin on the TPS2372-3RGWR?
The AUTCLS pin on the TPS2372-3RGWR enables autoclass functionality during classification. When pulled low to VSS during the first classification event, it causes the device to drop its classification current to Class 0 level after 81.5 ms (tACS), signaling to a Type 3 or Type 4 PSE that the PD supports advanced power negotiation per IEEE 802.3bt.
Can the TPS2372-3RGWR be used with legacy IEEE 802.3af/at PSEs?
Yes, the TPS2372-3RGWR is backward compatible with IEEE 802.3af (Type 1) and 802.3at (Type 2) PSEs. Its automatic MPS adjusts duty cycle to 25.8–26.4% for Type 1–2 operation, and classification resistors (CLSA/CLSB) can be configured for Class 0–4 signatures. No hardware changes are required to support mixed-PSE environments.
What thermal design considerations apply to the TPS2372-3RGWR in a 60-W PD application?
For 60-W operation, the TPS2372-3RGWR requires attention to thermal pad soldering (exposed pad must connect to VSS plane), PCB copper area ≥400 mm² under the package, and airflow or heatsinking if ambient exceeds 60°C. Its RθJA is 40.2°C/W; at 1.85-A load and 0.3-Ω RDS(on), power dissipation is ~1.03 W, resulting in ~41°C rise above ambient - well within the 125°C junction limit.
TPS2372-3RGWR 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)
TPS2372-3RGWR FAQ
1.How can I place an order for TPS2372-3RGWR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2372-3RGWR 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 TPS2372-3RGWR reliable?
The price and inventory of TPS2372-3RGWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2372-3RGWR is usually 5 days.
3.What payment methods are accepted for TPS2372-3RGWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2372-3RGWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2372-3RGWR?
TPS2372-3RGWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2372-3RGWR 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 TPS2372-3RGWR?
For technical support, including TPS2372-3RGWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2372-3RGWR requirements.
6.How does Aetrix verify that TPS2372-3RGWR is sourced from the original manufacturer or authorized distributors?
All TPS2372-3RGWR 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 TPS2372-3RGWR meets industry standards.
7.What is the process for return or replacement of TPS2372-3RGWR?
All TPS2372-3RGWR units undergo pre-shipment inspection (PSI). If there is an issue with TPS2372-3RGWR, 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 TPS2372-3RGWR part is unused and in its original packaging.
Return procedure for TPS2372-3RGWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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