TPS2372-4RGWR - 90W 802.3bt PoE PD Controller | TI
MPN: TPS2372-4RGWR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.89 | $3.89 |
| 10 | $3.51 | $35.10 |
| 100 | $3.13 | $313.00 |
| 500 | $2.87 | $1,435.00 |
| 1,000 | $2.6 | $2,600.00 |
TPS2372-4RGWR Overview
A PoE PD interface controller is the analog front-end IC that sits between the Ethernet cable's powered pairs and a device's isolated DC-DC converter. It performs detection, classification, inrush control and hot-swap switching under IEEE 802.3af/at/bt standards, forming part of the power management IC hierarchy used in networked devices such as access points, IP cameras and LED lighting.
Key features include support for both IEEE 802.3at (PoE+) and IEEE 802.3bt (draft) Type 1-4 powered devices, automatic MPS (Maintain Power Signature) and Autoclass, and low internal switch resistance that permits high-power designs up to 90 W. Automatic MPS allows the PD to remove the power converter from the MPS duty cycle for energy savings, while Autoclass enables the PSE to discover actual power consumption.
The TPS2372-4 uses the low inrush rating (335 mA) shared across its family, ensuring compatibility with all PSE types while a high-power PD must limit its converter startup peak current per the TI datasheet. The integrated low-resistance pass device reduces conduction losses versus discrete hot-swap MOSFET solutions.
Typical applications include 802.3bt Type 3/4 LED lighting drivers, 5G small-cell radios and wireless access points, security IP cameras, network switches, and industrial IoT gateways that draw power directly from the Ethernet cable.
Design consideration: pair the TPS2372-4 with a converter whose startup peak current respects the inrush envelope, and follow the TI EVM (TPS2372-3EVM-757) reference layout for the detection/classification front-end.
This page synthesizes distributor pricing, drop-in alternatives, comparison data, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for TPS2372-4RGWR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TPS2372-3RGWR
✅ Drop-In📋 Reference alternative (not in catalog)
TPS2373-4RGWR
✅ Drop-In📋 Reference alternative (not in catalog)
TPS2372-4RGWR Maximum Ratings & Electrical Characteristics
| Function | Power over Ethernet (PoE) PD interface controller |
| IEEE Standard Support | IEEE 802.3at (PoE+), IEEE 802.3bt (draft) Type 1-4 |
| Number of Channels | 1 |
| Maximum Power Class | 90 W (Type 4, PSE side) |
| Power at PD Input (100 m CAT5) | 71.3 W |
| Inrush Current (-4 grade) | 335 mA |
| Automatic MPS | Yes |
| Autoclass | Yes |
| Package | 20-VQFN (5x5 mm) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Lifecycle Status | Active |
TPS2372-4RGWR 20-vqfn (5x5 mm) Pin Configuration Guide
Pin configuration for TPS2372-4RGWR (20-vqfn (5x5 mm) package). This power device features gate, drain, and source terminals. For non-polarized packages, refer to the manufacturer datasheet for exact pin 1 orientation and footprint details. Common applications include power supply design, motor driving, and load switching.
No detailed pinout data available for TPS2372-4RGWR.
Refer to the datasheet for full pin configuration.
Typical Applications
TPS2372-4RGWR is suitable for 6 applications: PoE LED Lighting, Wireless Access Points and 5G Small Cells, IP Security Cameras, Network Switch and Router PD Ports, Industrial IoT Gateways and Sensors, PoE Splitter and Adapter Modules.
PoE LED Lighting
The TPS2372-4RGWR fits PoE LED luminaires because its IEEE 802.3bt Type 4 support delivers up to 71.3 W at the PD input over 100 m CAT5 cable, enough to drive multi-channel high-output LED engines without local mains wiring. The automatic MPS feature removes the lighting converter from the Maintain Power Signature duty cycle, cutting standby draw to microamp levels and helping installations meet energy codes. TI's TPS2372-3EVM-757 reference design specifically targets high-power PoE lighting, providing a proven front-end circuit. Placed between the RJ45 magnetics and the isolated LED driver, the controller handles detection, classification (Autoclass reports true consumption so the PSE allocates budget efficiently) and 335 mA inrush limiting before the LED converter starts, protecting both cable and switching stage.
Recommended
Wireless Access Points and 5G Small Cells
Wireless access points and 5G small cells benefit directly from the TPS2372-4RGWR because 802.3bt Type 4 provides the 70 W-class budget that high-throughput multi-radio APs consume. The low internal switch resistance of the integrated pass device minimizes conduction losses at these currents, improving thermal margin inside sealed outdoor enclosures. Autoclass lets the network switch discover actual per-port consumption, enabling denser AP deployment on a fixed PSE budget. In the circuit, the TPS2372-4 interfaces the powered pairs to the isolated forward converter, and its 335 mA inrush envelope must be respected by the converter soft-start. Automatic MPS allows the AP's processor to sleep the converter between beacon intervals, reducing idle energy draw at scale.
Recommended
IP Security Cameras
IP security cameras with IR illuminators, heaters, and PTZ motors often exceed the 25.5 W PoE+ limit, making the TPS2372-4RGWR's 802.3bt Type 4 capability (71.3 W at PD input) the right fit. The single-channel PD interface handles full detection and classification handshake automatically, ensuring interoperability across PSE vendors. Autoclass reports the camera's real power draw so surveillance switches can support more cameras per chassis. The 20-VQFN 5x5 package suits compact camera housings where board area is scarce. Designers must ensure the downstream camera power tree limits startup peak current within the 335 mA inrush window, after which the full cable budget is available for pan-tilt motors and infrared LED arrays.
Recommended
Network Switch and Router PD Ports
Mid-span and end-span powered network equipment uses the TPS2372-4RGWR as the standardized powered-device front-end for 802.3bt ports. Because the device implements IEEE 802.3at and 802.3bt Type 1-4 detection and classification entirely in hardware, interoperability testing against mixed PSE fleets is simplified. The automatic MPS circuitry maintains the required signature even when the system controller gates the main converter, preventing unexpected power disconnects during firmware updates or deep-sleep states. With low internal switch resistance, the hot-swap stage dissipates little heat at multi-amp loads, simplifying thermal design in fanless network appliances. A typical design chains the TPS2372-4 to an isolated LLC or active-clamp forward converter delivering 12 V or 54 V intermediate rails.
Recommended
Industrial IoT Gateways and Sensors
Industrial IoT gateways, edge AI nodes and building-automation controllers adopt the TPS2372-4RGWR to receive power and data over a single Ethernet run, eliminating electrician installation costs in factories and smart buildings. The 71.3 W PD input budget covers compute modules, radios and multi-protocol I/O simultaneously. Autoclass enables the PSE to reclaim unused power budget across hundreds of deployed nodes, improving total installation economics. The VQFN-20 5x5 mm package withstands industrial temperature requirements and the controller's inrush limiting (335 mA for the -4 grade) protects long cable runs and connector contacts during hot-plug events. TI's TPS2372-3EVM-757 reference circuitry provides a validated starting point for the detection and classification front-end in gateway designs.
Recommended
PoE Splitter and Adapter Modules
PoE splitter modules that convert an 802.3bt cable feed into isolated DC outputs use the TPS2372-4RGWR as the compliance front-end. The controller performs all IEEE 802.3af/at/bt detection, classification and inrush sequencing autonomously, so the splitter presents a correct powered-device signature to any PSE without firmware involvement. Autoclass lets the splitter advertise actual load, and automatic MPS keeps the link alive while the output connector is unloaded - a common real-world condition in field service. Designers pair the TPS2372-4 with a compact flyback converter to generate 5 V or 12 V outputs; the 90 W Type 4 headroom covers high-power USB charging variants. Small footprint (5x5 mm VQFN) keeps the adapter PCB within connector-form-factor constraints.
Recommended
Recommended Products Summary
Engineering reference data for TPS2372-4RGWR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS2372-3RGWR | TPS2373-4RGWR |
|---|---|---|---|
| Package | 20-VQFN (5x5 mm) | 20-VQFN (5x5 mm) - same | 20-VQFN (5x5 mm) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Max Power (PSE side) | 90 W | 60 W | 90 W |
| Power at PD Input (100 m CAT5) | 71.3 W | 51 W | 71.3 W |
| IEEE Standard | 802.3at / 802.3bt Type 1-4 | 802.3at / 802.3bt Type 1-3 | 802.3at / 802.3bt Type 1-4 |
| Autoclass | Yes | Yes | No (replaced by Advanced Startup) |
| Advanced Startup / Adapter Priority / UVLO Select | No | No | Yes (pins 14/15, 10, 16) |
| Automatic MPS | Yes | Yes | Yes |
Key Differentiators
- Highest power tier support in family (vs TPS2372-3RGWR)
- Autoclass energy discovery (vs TPS2373-4RGWR)
- Automatic MPS for standby savings (vs TPS2373-4RGWR)
Design Notes
According to the TI datasheet, a high-power PD must limit its converter startup peak current because the TPS2372-4 implements a 335-mA inrush current. Select a downstream DC-DC converter with an adequately soft-started output (increasing the soft-start capacitor as needed) so that total input current during inrush stays within the envelope across minimum PSE voltage and load conditions. Ignoring this causes premature classification failure or PSE disconnect during startup.
Estimated: at 90 W Type 4 operation, the PD receives 71.3 W over a 100 m CAT5 cable per the TI datasheet, meaning roughly 18.7 W is lost in the cable. Budget the downstream converter efficiency (target >=90% for the main stage) so end-equipment delivered power meets the product requirement. The TPS2372-4RGWR's low internal switch resistance keeps the front-end contribution small, but conduction loss at multi-amp PoE current still warrants a solid RTN plane under the VQFN.
Follow the TPS2372-3EVM-757 reference layout (TI evaluation module for the TPS2372 family) for the detection and classification front-end: keep the sense resistors and classification components close to the IC, Kelvin-connect to RTN, and use a low-ESR bulk capacitor at VDD. The exposed pad of the 20-VQFN 5x5 package must be soldered to a grounded copper pour for both thermal and electrical performance. Feature differences between the TPS2372 and TPS2373 families affect pins 10, 14, 15 and 16 - do not assume pin-for-pin substitution without checking the TI E2E comparison.
Compliance Information
RoHS compliance per TI product/distributor listings. REACH, halogen-free and conflict-minerals status not found in provided data - obtain the TI environmental certificate from ti.com/product/TPS2372.
