My Inquiry
My Account
Texas Instruments TPS2373-4RGWR
- Part No.:
- TPS2373-4RGWR
- Manufacturer:
- Texas Instruments
- Category:
- Power Over Ethernet (PoE) Controllers
- Package:
- 20-VQFN Exposed Pad
- Datasheet:
-
TPS2373-4RGWR.pdf
- Description:
- IC POE CNTRL 1 CHANNEL 20VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,208
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS2373-4RGWR from Texas Instruments is a IEEE 802.3bt Type-4 PoE powered device (PD) interface IC with integrated 0.1-Ω hot-swap MOSFET, 2.2-A current limit, and advanced DC-DC startup control. It delivers up to 90 W at PD input (71.3 W after 100-m CAT5 cable loss) and supports automatic Maintain Power Signature (MPS) for ultra-low standby power in security cameras and multiband access points.
For engineers reviewing the TPS2373-4RGWR datasheet, TPS2373-4RGWR pinout, TPS2373-4RGWR application, or TPS2373-4RGWR equivalent, key selection criteria include PoE++ inrush compliance, VC_OUT bias supply capability (13.8 V startup, 60 mA sourcing), dual classification current programming (CLSA/CLSB), and thermal shutdown at 158°C.
Technical Context
The TPS2373-4RGWR implements full IEEE 802.3bt Type-4 PD functionality: detection (56.5 µA typical DEN current), two-event hardware classification (programmable via CLSA/CLSB resistors), and inrush current limiting (335 mA typical, 20 ms delay). Its internal 0.1-Ω MOSFET sustains 2.2-A continuous current with foldback protection triggered above 14.5 V RTN.
Advanced startup logic generates a controlled VC_OUT ramp (13.8 V nominal, 26 mA typical startup current) to drive external PWM controllers, while automatic MPS dynamically adjusts duty cycle (5.4%, 8.1%, or 12.5%) based on RMPS_DUTY resistor value and PSE type-enabling <1 mA quiescent operation during standby.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IEEE Standard | Compliant with IEEE 802.3bt Type-4 (90-W) and backward-compatible with Type-1–3. |
| rDS(on) | 0.1 Ω typical - enables high-efficiency 90-W power delivery with low conduction loss. |
| Current Limit | 2.2 A typical - supports sustained 71.3 W at PD input over 100-m CAT5 cable. |
| VC_OUT Startup Voltage | 13.8 V - directly powers low-voltage PWM controllers without auxiliary bias winding. |
| MPS Duty Cycle | Programmable 5.4% / 8.1% / 12.5% - matches PSE requirements while minimizing standby current. |
| Junction Temp Range | –40°C to +125°C - qualified for industrial and outdoor PoE applications including pico-base stations. |
| Inrush Current Limit | 335 mA typical - meets IEEE 802.3bt inrush timing and amplitude requirements. |
Pinout & Package
TPS2373-4RGWR uses a 20-pin VQFN (RGW) package with 5.00 mm × 5.00 mm body size and exposed thermal pad connected to VSS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | PoE input rail connection | Bypassed with 0.1 µF to VSS; accepts 0–57 V PoE voltage. |
| DEN | Detection signature enable | 24.9 kΩ pull-up to VDD establishes IEEE-compliant 56.5 µA detection current. |
| CLSA / CLSB | Classification current outputs | Resistor-to-VSS sets Class A/B signature per IEEE 802.3bt (e.g., 1210 Ω → 2.5 mA). |
| RTN | Pass MOSFET drain return | High-current path (2.2 A) to load; connects to transformer center-tap or spare pair return. |
| VC_OUT | DC-DC controller bias supply | Delivers 13.8 V startup voltage and 60 mA operational current to PWM ICs. |
| AMPS_CTL | Automatic MPS current control | Resistor-to-VSS programs MPS amplitude (e.g., 1 kΩ → 24 V pulsed output). |
| MPS_DUTY | MPS duty cycle select | Resistor-to-VSS selects 5.4% (open), 8.1% (~60.4 kΩ), or 12.5% (short) duty cycle. |
| APD | Auxiliary power detect | Raised >1.65 V above RTN disables PoE pass FET and prioritizes external adapter. |
| PG | Power Good indicator | Open-drain active-high signal confirms stable VC_OUT and valid PoE power. |
| TPH / TPL / BT | PSE allocation status outputs | Binary-coded open-drain signals indicate detected PSE type (Type-3/4, 2-/4-event). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 0.1-Ω Hot-Swap MOSFET | Enables 90-W Type-4 PoE operation with <0.25 W conduction loss at 2.2 A. |
| Advanced DC-DC Startup | Generates controlled VC_OUT ramp to simplify soft-start design and reduce bias capacitor size. |
| Auto-Adaptive MPS | Dynamically selects duty cycle and current amplitude to maintain PSE power signature across Type-1–4 PSEs. |
| Primary Adapter Priority | APD input forces TPH low and disables PoE FET when external 12-V adapter is present. |
| Robust Thermal Protection | Thermal shutdown at 158°C with 20°C hysteresis prevents damage during overload or poor heatsinking. |
Applications
| Security Cameras | Multiband Access Points |
|---|---|
Use Scenario: Outdoor IP camera with pan-tilt-zoom, IR illumination, and video streaming over single Ethernet cable. IC Role / Device Role / Timing Role: Primary PoE interface managing 90-W power negotiation, inrush control, and VC_OUT bias for DC-DC converter. Use Value: Enables full-feature camera operation without local AC adapter while meeting IEEE 802.3bt startup and MPS requirements. |
Use Scenario: Dual-band (2.4 GHz + 5 GHz) Wi-Fi 6 access point with integrated Bluetooth and IoT radio co-location. IC Role / Device Role / Timing Role: High-power PD controller delivering stable 71.3 W to multiple RF power amplifiers and baseband processors. Use Value: Supports simultaneous multi-radio operation and thermal margin via 0.1-Ω FET and 125°C junction rating. |
| Pico-Base Stations | Video and VoIP Telephones |
Use Scenario: Compact 4G/LTE small cell deployed on streetlight poles with limited airflow and wide ambient temperature range. IC Role / Device Role / Timing Role: PoE interface with priority auxiliary power handling and robust thermal shutdown (158°C). Use Value: Ensures uninterrupted operation using PoE++ or fallback to 12-V adapter, validated from –40°C to +125°C. |
Use Scenario: Enterprise-grade VoIP phone with color display, speakerphone, and USB peripheral support. IC Role / Device Role / Timing Role: Dual-role PD providing 90-W headroom for future feature expansion and auxiliary USB power delivery. Use Value: Eliminates need for separate power brick while enabling high-fidelity audio processing and display backlighting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PoE PD interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT4295IUFD#PBF | Supports IEEE 802.3bt Type-4 but uses external MOSFET; higher BOM count and layout complexity. | Lacks integrated 0.1-Ω FET and advanced VC_OUT startup - requires external bias supply and soft-start circuitry. | Choose when discrete FET selection or thermal separation is required; not drop-in compatible. |
| MAX5984DEWI+T | IEEE 802.3at (PoE+) only; max 30-W delivery; no Type-4 support or auto-MPS duty cycling. | Restricted to 60-W systems; cannot meet 90-W or IEEE 802.3bt mutual identification requirements. | Select only for legacy PoE+ designs where 90-W capability and BT-classification outputs are unnecessary. |
Compared with LT4295IUFD#PBF and MAX5984DEWI+T, the TPS2373-4RGWR provides integrated high-current FET, programmable MPS duty cycle, and native 90-W PoE++ support - reducing component count, simplifying layout, and ensuring full IEEE 802.3bt compliance without external bias or timing components.
Availability
TPS2373-4RGWR is available at Aetrix Electronics and suitable for security cameras, multiband access points, and pico-base stations requiring stable component supply, long-term lifecycle assurance, and full IEEE 802.3bt Type-4 certification support.
Supply support for TPS2373-4RGWR 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 company specializing in analog and embedded processing technologies, with leadership in power management and interface solutions.
The TPS2373 product line delivers integrated PoE PD interfaces optimized for IEEE 802.3bt Type-3 and Type-4 applications, combining high-efficiency power delivery, intelligent startup sequencing, and robust system-level protection.
FAQ
What is the maximum continuous power the TPS2373-4RGWR can deliver to the load?
The TPS2373-4RGWR supports IEEE 802.3bt Type-4 operation with up to 90 W sourced from the PSE. Accounting for 100-m CAT5 cable loss, it delivers 71.3 W at the PD input. This is enabled by its 0.1-Ω internal MOSFET and 2.2-A current limit, verified across –40°C to +125°C junction temperature.
How does the TPS2373-4RGWR implement automatic Maintain Power Signature (MPS)?
The TPS2373-4RGWR implements automatic MPS by monitoring RTN current and generating precise pulsed current through AMPS_CTL. The MPS duty cycle (5.4%, 8.1%, or 12.5%) is selected via RMPS_DUTY resistor value, and the amplitude is set by the AMPS_CTL resistor - eliminating manual timing adjustments required for Type-1–4 PSE compatibility.
Can the TPS2373-4RGWR prioritize an external power adapter over PoE?
Yes. The TPS2373-4RGWR includes an APD (Auxiliary Power Detect) input. When APD is raised >1.65 V above RTN, the device disables the internal pass MOSFET, forces TPH low, and deactivates TPL/BT - seamlessly switching to external adapter power while maintaining system operation.
What is the function of the VC_OUT pin on the TPS2373-4RGWR?
The VC_OUT pin on the TPS2373-4RGWR supplies a regulated startup voltage (13.8 V typical) and up to 60 mA of sourcing current to drive external PWM controllers. It eliminates the need for a separate auxiliary bias winding and simplifies DC-DC converter design by integrating soft-start control and UVLO management.
Does the TPS2373-4RGWR support both 2-event and 4-event classification per IEEE 802.3bt?
Yes. The TPS2373-4RGWR supports full IEEE 802.3bt classification: CLSA and CLSB pins allow independent programming of Class A and Class B signatures, enabling 2-event (Type-3) or 4-event (Type-4) detection sequences. TPH and TPL outputs provide binary-coded feedback indicating detected PSE type and event count.
TPS2373-4RGWR 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:
- Yes
- Standards:
- 802.3at (PoE+), 802.3bt
- Voltage - Supply:
- 0V ~ 57V
- Current - Supply:
- 20mA
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-VQFN (5x5)
TPS2373-4RGWR FAQ
1.How can I place an order for TPS2373-4RGWR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2373-4RGWR 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 TPS2373-4RGWR reliable?
The price and inventory of TPS2373-4RGWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2373-4RGWR is usually 5 days.
3.What payment methods are accepted for TPS2373-4RGWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2373-4RGWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2373-4RGWR?
TPS2373-4RGWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2373-4RGWR 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 TPS2373-4RGWR?
For technical support, including TPS2373-4RGWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2373-4RGWR requirements.
6.How does Aetrix verify that TPS2373-4RGWR is sourced from the original manufacturer or authorized distributors?
All TPS2373-4RGWR 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 TPS2373-4RGWR meets industry standards.
7.What is the process for return or replacement of TPS2373-4RGWR?
All TPS2373-4RGWR units undergo pre-shipment inspection (PSI). If there is an issue with TPS2373-4RGWR, 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 TPS2373-4RGWR part is unused and in its original packaging.
Return procedure for TPS2373-4RGWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS2373-4RGWR Tags
-
TPS2378DDAR
Texas Instruments
-
TPS23753APWR
Texas Instruments
-
TPS23756PWPR
Texas Instruments
-
TPS23750PWPR
Texas Instruments
-
MP8007GV-Z
Monolithic Power Systems Inc.
-
TPS23861PWR
Texas Instruments
-
TPS23753PWR
Texas Instruments
-
PD69201ILD-TR
Microchip Technology
-
SI3402-B-GM
Skyworks Solutions Inc.
-
SI3402-B-GMR
Skyworks Solutions Inc.
-
SI34071-A01-GMR
Skyworks Solutions Inc.
-
SI3404-A-GMR
Skyworks Solutions Inc.
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
