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Texas Instruments TPS2372-4RGWR
- Part No.:
- TPS2372-4RGWR
- Manufacturer:
- Texas Instruments
- Category:
- Power Over Ethernet (PoE) Controllers
- Package:
- 20-VQFN Exposed Pad
- Datasheet:
-
TPS2372-4RGWR.pdf
- Description:
- IC POE CNTRL 1 CHANNEL 20VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:6,228
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Product details
Overview
TPS2372-4RGWR from Texas Instruments is a Type-4 IEEE 802.3bt PoE powered device (PD) interface IC with integrated 0.1-Ω hot-swap MOSFET, supporting up to 90 W input power, 2.2-A current limit, and automatic maintain power signature (MPS) generation for ultra-low standby operation in LED lighting and security camera systems.
For engineers reviewing the TPS2372-4RGWR datasheet, TPS2372-4RGWR pinout, TPS2372-4RGWR application, or TPS2372-4RGWR equivalent, this device delivers IEEE 802.3bt-compliant classification, autoclass support, PSE type identification outputs (TPH/TP L/BT), and robust 100-V absolute maximum input rating - critical for high-reliability PoE++ infrastructure design.
Technical Context
The TPS2372-4RGWR implements full IEEE 802.3bt Type-4 PD functionality including detection (1.4–10.1 V range), two-event hardware classification via CLSA/CLSB resistors, and inrush current limiting (335 mA typical). Its internal 0.1-Ω MOSFET enables high-efficiency power delivery up to 90 W at the PD input.
It integrates automatic MPS with programmable duty cycle (5.4%, 8.1%, or 12.5% via MPS_DUTY resistor), real-time RTN current sensing for MPS activation threshold (18–38 mA), and autoclass enable (AUTCLS) for dynamic power negotiation with Type-3/4 PSEs - all operating across –40°C to 125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IEEE Standard Compliance | IEEE 802.3bt Type-4 (90-W) and backward-compatible with Type-3/2/1 |
| Input Voltage Range | 0–57 V (operating); 100 V absolute max - supports long-cable PoE++ deployments |
| Pass MOSFET RDS(on) | 0.1 Ω typical - minimizes conduction loss for >71 W delivered power at PD input |
| Current Limit | 2.2 A typical - sustains continuous 90-W operation under worst-case cable drop |
| MPS Duty Cycle Options | 5.4% (Type 3–4), 8.1% (mid-range), 12.5% (Type 1–2) - selectable via external MPS_DUTY resistor |
| Operating Temperature | –40°C to 125°C - qualified for industrial and outdoor PoE endpoints |
| Package | 20-pin VQFN (5.0 mm × 5.0 mm) - thermally enhanced for high-power dissipation |
Pinout & Package
TPS2372-4RGWR uses a 20-pin VQFN package (5.0 mm × 5.0 mm) with exposed thermal pad connected to VSS for optimal heat dissipation in high-current PoE applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive PoE input rail | Bypassed to VSS with 0.1 µF capacitor; powers internal circuitry and gate driver |
| DEN | Detection & enable control | 24.9-kΩ pull-up to VDD enables detection; grounded to disable MOSFET during operation |
| CLSA / CLSB | Classification current programming | Resistors to VSS set Class A/B signatures per IEEE 802.3bt (e.g., 63.4 Ω = Class 4) |
| VSS / RTN | Ground reference & MOSFET return | VSS = logic ground; RTN = MOSFET drain return - must be low-inductance connection to load |
| AMPS_CTL | Automatic MPS current control | Resistor to VSS programs MPS amplitude; open disables MPS |
| MPS_DUTY | MPS duty cycle selection | Resistor to VSS selects 5.4%/8.1%/12.5% duty cycle for Type-3/4 or Type-1/2 PSE compatibility |
| AUTCLS | Autoclass enable input | Pulled low to VSS during classification to signal Autoclass capability to Type-3/4 PSE |
| PG | Power Good indicator | Open-drain output with 81.5-ms inrush delay - used to enable downstream DC/DC converter |
| TPH / TPL / BT | PSE type identification outputs | Active-low open-drain signals indicating IEEE 802.3bt Type-3 (TPL), Type-4 (TPH), or mutual identification (BT) |
| IRSHDL_EN | Inrush delay enable | Internally pulled up; left open to activate 81.5-ms inrush delay for PSE compliance |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 100-V Hotswap MOSFET | 0.1-Ω RDS(on) enables 90-W Type-4 operation with <1.1 W conduction loss at 2.2 A |
| Automatic Maintain Power Signature (MPS) | Self-adjusting pulsed current generation eliminates external timing components and reduces standby BOM count |
| Programmable MPS Duty Cycle | Three discrete duty options (5.4%/8.1%/12.5%) via single resistor - ensures compatibility across PSE types without firmware |
| Autoclass Support | Hardware-enabled dynamic classification signaling allows Type-3/4 PSEs to allocate precise power budgets during startup |
| PSE Type Identification Outputs | TPH, TPL, and BT pins provide real-time, open-drain status of detected PSE capability - simplifies system-level power management |
| Robust Thermal Protection | 158°C shutdown with 20°C hysteresis and junction-to-board thermal resistance of 16.1°C/W - sustains reliability in sealed enclosures |
Applications
| LED Lighting Systems | Security Cameras |
|---|---|
Use Scenario: Outdoor IP cameras with integrated LED illuminators requiring 48–57 V PoE++ power and low-power night-mode operation. IC Role / Device Role / Timing Role: Primary PD interface managing detection, classification, MPS maintenance, and PG-controlled DC/DC enable sequencing. Use Value: Enables 90-W headroom for high-lumen LEDs while maintaining <1 mA standby via automatic MPS - extends battery backup runtime in hybrid systems. |
Use Scenario: 4K PTZ security cameras with motorized optics, image sensors, and IR illumination powered over single Ethernet cable. IC Role / Device Role / Timing Role: Controls inrush, class negotiation, and PSE type identification to ensure stable 71.3 W delivered power after 100-m CAT5 deployment. Use Value: 0.1-Ω MOSFET and 2.2-A current limit sustain peak motor + sensor + IR loads without thermal foldback - eliminates brownouts during pan/tilt events. |
| Multi-band Wi-Fi Access Points | Industrial Power Modules |
Use Scenario: Tri-band 802.11ax access points with RF front-ends, baseband processors, and PoE-powered cooling fans. IC Role / Device Role / Timing Role: Provides dual-class signature (CLSA/CLSB), autoclass signaling, and TPH/TP L outputs to negotiate 90-W allocation from Type-4 PSEs. Use Value: Hardware-based autoclass and MPS eliminate MCU dependency - reduces firmware complexity and startup latency by >100 ms. |
Use Scenario: DIN-rail mounted PoE-powered industrial controllers delivering regulated 12/24 V to field I/O modules and actuators. IC Role / Device Role / Timing Role: Serves as primary PD front-end with PG output enabling isolated DC/DC converters and RTN-sensed current monitoring. Use Value: 125°C junction rating and 38.0°C/W RθJA allow operation in 70°C ambient enclosures without forced air - cuts system cooling cost by 30%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PoE PD interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2372-3RGWR | 0.3-Ω MOSFET, 1.85-A current limit, 60-W max - lower power, higher RDS(on), reduced thermal performance | Suitable for Type-3 (60-W) systems only; cannot support 90-W LED arrays or multi-radio APs | Select only when power budget is capped at 51 W at PD input and thermal margin is sufficient. |
| LT4295IMS#PBF | IEEE 802.3bt-compliant, 0.12-Ω MOSFET, 2.1-A limit, but no autoclass or MPS_DUTY programmability | Lacks hardware autoclass and fixed 12.5% MPS duty - requires external circuitry for Type-3/4 PSE optimization | Choose when simplified BOM outweighs dynamic power negotiation needs; verify PSE compatibility per installation. |
Compared with TPS2372-4RGWR, TPS2372-3RGWR delivers lower power with higher conduction loss, while LT4295IMS#PBF omits autoclass and programmable MPS - making TPS2372-4RGWR the only option supporting full IEEE 802.3bt Type-4 feature set in a single chip.
Availability
TPS2372-4RGWR is available at Aetrix Electronics and suitable for LED lighting systems, security cameras, multi-band access points, industrial power modules, and pass-through PoE systems requiring stable component supply and full IEEE 802.3bt Type-4 compliance.
Supply support for TPS2372-4RGWR 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 fully integrated IEEE 802.3bt PoE PD interfaces targeting high-power, thermally constrained endpoints such as smart lighting, surveillance, and wireless infrastructure.
FAQ
What is the maximum continuous power supported by the TPS2372-4RGWR?
The TPS2372-4RGWR supports up to 90 W of continuous input power from an IEEE 802.3bt Type-4 PSE. At the PD input, assuming 100-meter CAT5 cable, it delivers up to 71.3 W to the downstream load. This is enabled by its 0.1-Ω internal MOSFET and 2.2-A current limit, which minimize conduction losses and sustain high-current operation across the full –40°C to 125°C junction range.
How does the TPS2372-4RGWR implement automatic Maintain Power Signature (MPS)?
The TPS2372-4RGWR implements automatic MPS by monitoring RTN current and generating precisely timed current pulses through AMPS_CTL when load current drops below 18–38 mA. The MPS duty cycle (5.4%, 8.1%, or 12.5%) is selected via an external resistor on MPS_DUTY, allowing seamless compatibility with Type-1/2 and Type-3/4 PSEs without software intervention or external timers.
What is the function of the AUTCLS pin on the TPS2372-4RGWR?
The AUTCLS pin on the TPS2372-4RGWR enables hardware-based autoclass signaling during IEEE 802.3bt classification. When pulled low to VSS during the first class event, it causes the device to drop its classification current to Class 0 level after 76–87 ms, informing Type-3/4 PSEs that the PD supports dynamic power negotiation - enabling precise, multi-stage power allocation without MCU involvement.
Can the TPS2372-4RGWR be used with legacy IEEE 802.3af/at PSEs?
Yes, the TPS2372-4RGWR is backward compatible with IEEE 802.3af and 802.3at PSEs. It automatically adjusts MPS duty cycle to 12.5% for Type-1/2 PSEs and supports standard two-event classification. Its detection signature (24.9-kΩ DEN resistor) and classification current ranges meet all legacy requirements while retaining full Type-4 capability when connected to 802.3bt infrastructure.
What thermal considerations apply to the TPS2372-4RGWR in high-power designs?
The TPS2372-4RGWR has a junction-to-board thermal resistance (RθJB) of 16.1°C/W and requires the exposed thermal pad to be soldered to a large VSS copper pour. At 2.2 A and 0.1 Ω, power dissipation reaches ~484 mW - resulting in ~7.8°C rise above board temperature. Layout must include ≥4 thermal vias under the pad and avoid routing high-speed signals beneath the IC to prevent thermal coupling and ensure reliable 125°C operation.
TPS2372-4RGWR 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:
- 90 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 (TJ)
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-VQFN (5x5)
TPS2372-4RGWR FAQ
1.How can I place an order for TPS2372-4RGWR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2372-4RGWR 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 TPS2372-4RGWR reliable?
The price and inventory of TPS2372-4RGWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2372-4RGWR is usually 5 days.
3.What payment methods are accepted for TPS2372-4RGWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2372-4RGWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2372-4RGWR?
TPS2372-4RGWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2372-4RGWR 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 TPS2372-4RGWR?
For technical support, including TPS2372-4RGWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2372-4RGWR requirements.
6.How does Aetrix verify that TPS2372-4RGWR is sourced from the original manufacturer or authorized distributors?
All TPS2372-4RGWR 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 TPS2372-4RGWR meets industry standards.
7.What is the process for return or replacement of TPS2372-4RGWR?
All TPS2372-4RGWR units undergo pre-shipment inspection (PSI). If there is an issue with TPS2372-4RGWR, 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 TPS2372-4RGWR part is unused and in its original packaging.
Return procedure for TPS2372-4RGWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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