TPS2372-4RGWT - IEEE 802.3bt PoE PD Controller 90W | TI
MPN: TPS2372-4RGWT ✓ NakahandaTPS2372-4RGWT Ulas
A PoE PD controller is the front-end power-management IC that resides inside a powered device such as an IP camera, wireless access point, or LED luminaire. It performs detection, classification, and inrush-current limiting so the power-sourcing equipment (PSE) in the network switch can safely identify and power the device over the Ethernet cable. Within the power-management hierarchy, it sits between the RJ45 magnetics/diode bridge and the isolated DC-DC converter that generates the system rails.
Key features of the TPS2372-4 include support for IEEE 802.3at (PoE+) and 802.3bt draft Type 1-4 power classes, Automatic MPS to maintain power through low-load periods, and Autoclass for accurate power allocation reporting to the PSE. The -4 variant's low internal switch resistance enables full 90 W Type 4 operation, while the related TPS2372-3 supports up to 60 W.
Technically, the device integrates the detection and classification signature resistors, a hot-swap MOSFET with current limiting, thermal protection, and fault supervision. The low switch resistance minimizes conduction losses at the multi-ampere input currents demanded by Type 3 and Type 4 systems, improving overall efficiency and reducing heatsinking requirements.
Typical applications include 802.3bt high-power LED lighting, 5G small cells and wireless access points, PTZ IP security cameras, and industrial networked devices where a single Ethernet cable delivers both data and up to 90 W of power.
When designing, place the IEEE signature components (the 24.9 k-ohm detection resistor and classification resistors) directly at the VDD/RTN pins, and verify the inrush and operating current limits against your isolated converter's input capacitance to avoid nuisance tripping during startup.
This page synthesizes distributor availability, same-package drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Mga alternatibo na pwedeng ilagay na TPS2372-4RGWT — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok TPS2372-4RGWT (parehas na form factor at footprint) — pagkakaiba sa Function, Package.
TPS2372-3RGWR
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
TPS2373-4RGWR
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
TPS2372-3RGWT
✅ Drop-In ⚠️ Mga Talaan Hindi NaiwerikmoMagkontak para sa presyo
Tingnan ang Datasheet →TPS2373-3RGWR
✅ Drop-In ⚠️ Mga Talaan Hindi Naiwerikmo📋 Alternatibo na Reference (hindi sa katalogo)
TPS2378RGWR
✅ Drop-In ⚠️ Mga Talaan Hindi Naiwerikmo📋 Alternatibo na Reference (hindi sa katalogo)
TPS2372-4RGWT Mga Pinakamataas na Rating at Electrical Characteristics
| Fungsi | PoE Powered Device (PD) Controller |
| Number of Channels | 1 |
| PoE Standards Supported | IEEE 802.3at (PoE+), IEEE 802.3bt (draft) |
| PoE Type Support | Type 1-4 |
| Maximum Power | 90 W |
| Internal Switch | Yes |
| Supply Voltage Range | 0 V to 57 V |
| Kuru-kuryente ng Pagbibigay | 550 uA |
| Automatic MPS | Yes |
| Autoclass | Yes |
| Auxiliary Sense | No |
| Temperature na Operasyon | -40C to +125C (TJ) |
| Packhaging | 20-VQFN (5x5 mm) with exposed pad |
| Uri ng Pagpapasok | Surface Mount |
| Part Status | Active |
Gabay sa Pin Configuration ng TPS2372-4RGWT 20-vqfn (5x5 mm) with exposed pad
Pin configuration para sa TPS2372-4RGWT (20-vqfn (5x5 mm) with exposed pad package). Ang power device na ito ay may gate, drain, at source terminals. Para sa mga non-polarized package, sumangguni sa datasheet ng manufacturer para sa eksaktong oryentasyon ng pin 1 at mga detalye ng footprint. Kasama sa mga karaniwang aplikasyon ang disenyo ng power supply, motor driving, at load switching.
Wala ng detalyadong pinout data na magagamit para sa TPS2372-4RGWT.
Sumangguni sa datasheet para sa buong pin configuration.
Tipikal na mga Gamit
TPS2372-4RGWT ay nararapat para sa 6 aplikasyons: High-Power PoE LED Lighting, IEEE 802.3bt Wireless Access Points, PTZ IP Security Cameras, Industrial Networked Devices and IoT Gateways, PoE-Backed Thin Clients and Display Terminals, PoE Splitter and Midspan Power Modules.
High-Power PoE LED Lighting
The TPS2372-4RGWT fits 802.3bt LED luminaire designs where a single Ethernet cable carries both control data and up to 90 W of drive power. Its Type 4 capability and low internal switch resistance minimize input-side conduction loss at the multi-ampere currents typical of 90 W luminaires, while Autoclass lets the PSE allocate only the power the fixture actually draws, increasing switch port utilization. TI's TPS2372-3EVM-757 evaluation module validates the family in PoE lighting circuits. The controller's inrush limiting protects the downstream constant-current LED driver input capacitors, and Automatic MPS keeps power alive through dimming-related low-load intervals, avoiding nuisance PSE disconnects.
Inirekomenda
IEEE 802.3bt Wireless Access Points
Multi-radio 802.11ax/802.11be access points and 5G small cells routinely consume 40-70 W, which only 802.3bt Type 3/4 PoE can deliver over one cable. The TPS2372-4RGWT provides the full Type 1-4 detection and classification front-end with 0 V to 57 V input tolerance, handling the wide voltage variation on long cable runs. Its 550 uA supply current keeps idle signature loading minimal, and the integrated hot-swap MOSFET with current limiting protects the isolated DC-DC converter during cable insertion. Autoclass reporting lets dense campus switches reclaim unused power budget, allowing more APs per switch chassis.
Inirekomenda
PTZ IP Security Cameras
Pan-tilt-zoom cameras with infrared illuminators and heaters peak well above the 25.5 W limit of PoE+, making 802.3bt Type 4 (90 W) mandatory. The TPS2372-4RGWT qualifies the PD for the full Type 4 power budget, and its low switch resistance limits voltage drop at peak motor and heater inrush currents, preserving headroom for the isolated converter. Automatic MPS maintains power when the camera momentarily reduces load during idle pan cycles, preventing PSE disconnect. The -40C to +125C junction rating supports outdoor enclosures, and the 20-pin VQFN exposed pad simplifies thermal design in compact camera housings.
Inirekomenda
Industrial Networked Devices and IoT Gateways
Industrial gateways, edge-compute nodes, and IP intercoms benefit from single-cable power and data deployment where local AC outlets are impractical. The TPS2372-4RGWT provides IEEE 802.3at/802.3bt compliant detection, classification, and fault protection with a 0 V to 57 V operating envelope that absorbs surge and cable-length variation on factory floor runs. Its integrated solution replaces discrete hot-swap MOSFETs and signature resistor networks, cutting BOM count. Autoclass ensures the industrial PoE switch budget is used accurately, and the -40C to +125C junction range matches the environmental profile of DIN-rail and IP67 enclosure installations.
Inirekomenda
PoE-Backed Thin Clients and Display Terminals
Conference-room touch panels, digital signage players, and PoE thin clients draw 50-90 W in compact enclosures without room for external power bricks. The TPS2372-4RGWT's 802.3bt Type 4 support delivers the full 90 W budget, and its integrated pass switch removes the discrete MOSFET, simplifying layout in tight display bezels. Inrush limiting protects large bulk capacitance on the display logic rails, while thermal shutdown and fault supervision safeguard the isolated converter. Autoclass reporting lets IT infrastructure account for real terminal consumption across large fleets of wall-mounted units powered entirely over structured cabling.
Inirekomenda
PoE Splitter and Midspan Power Modules
PoE splitter modules that convert inline 802.3bt power to barrel-jack DC for legacy equipment need a robust PD front-end with wide input tolerance. The TPS2372-4RGWT handles the 0 V to 57 V input span and full Type 1-4 classification, allowing splitters to pass up to 90 W to the downstream regulator. Its low internal switch resistance limits thermal rise inside sealed splitter housings at the approximately 1.7 A continuous input of a 90 W splitter, and Automatic MPS keeps legacy loads powered through standby intervals. The exposed-pad VQFN package supports compact PCB designs typical of inline splitter form factors.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for TPS2372-4RGWT — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | TPS2372-3RGWR | TPS2373-4RGWR | TPS2378RGWR |
|---|---|---|---|---|
| Package | 20-VQFN (5x5 mm) EP | 20-VQFN (5x5 mm) - same | 20-VQFN (5x5 mm) - same | 20-VQFN (5x5 mm) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| PoE Standards | 802.3at, 802.3bt Type 1-4 | 802.3at, 802.3bt Type 1-3 | 802.3at, 802.3bt Type 1-4 | 802.3bt-ready |
| Automatic MPS | Yes | Yes | Yes | Yes |
| Adapter Priority / Aux Sense | No | No | Yes (pin 10) | Yes (APS) |
| Operating Temperature | -40C to +125C (TJ) | -40C to +125C (TJ) | -40C to +125C (TJ) | -40C to +125C (TJ) |
Pangunahing mga Pagkakaiba
- Full 90 W Type 4 power capability (kumpara saTPS2372-3RGWR)
- Autoclass power reporting (kumpara saTPS2373-4RGWR)
- Integrated internal switch (kumpara saTPS2378RGWR)
Talaan ng Disenyo
At 90 W (Type 4), input current at nominal 53 V is roughly 1.7 A, and substantially higher at the low end of the PSE voltage range on long cable runs. Verify the internal switch conduction loss (I-squared-R) plus control and gate-drive losses against the VQFN exposed-pad thermal impedance, and size the downstream isolated converter's input bulk capacitance so the TPS2372-4 inrush and current limits are not tripped during worst-case startup. These dissipation figures are engineering estimates based on stated power levels, not datasheet values.
Place the IEEE 802.3 detection (24.9 k-ohm) and classification resistor networks directly at the VDD and RTN pins with short, low-inductance traces, since lead inductance and PCB leakage can corrupt the detection and classification signatures read by the PSE. Solder the exposed pad to a solid ground pour with multiple thermal vias to dissipate switch conduction heat. Keep the hot-swap loop (input bulk cap to switch to converter) compact to minimize parasitic ringing during fault transients.
Do not assume the TPS2372-4 and TPS2373-4 are fully interchangeable despite the identical footprint: the TPS2373 exposes advanced-startup, adapter-priority, and UVLO-select pins where the TPS2372 uses them differently, and the TPS2372's Autoclass is absent on the TPS2373 (per TI E2E guidance). Also note the TPS2372-4 has no auxiliary sense; retrofitting adapter input requires a different part. Finally, 802.3bt draft-era documentation may differ from final-standard behavior - always use the latest TI datasheet revision.
Estimated: at 90 W delivered and assuming roughly 1 ohm-class switch resistance, switch conduction loss is on the order of 2-3 W plus control losses. With a compact 5x5 mm VQFN, junction temperature rise is dominated by PCB copper area, so provide at least 1 square inch of 2-oz copper on the exposed-pad layer in confined housings such as camera or luminaire enclosures, and derate at ambient temperatures above 60C. Validate with thermal imaging on the finished board.
Impormasyon ng Pagsunod sa Kautusan
Compliance data was not present in the retrieved web data; consult the TI product page for current RoHS/REACH status.
