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Texas Instruments TPS2373-4RGWT
- Part No.:
- TPS2373-4RGWT
- Manufacturer:
- Texas Instruments
- Category:
- Power Over Ethernet (PoE) Controllers
- Package:
- 20-VQFN Exposed Pad
- Datasheet:
-
TPS2373-4RGWT.pdf
- Description:
- IC POE CNTRL 1 CHANNEL 20VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,073
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Product details
Overview
TPS2373-4RGWT from Texas Instruments is a high-power IEEE 802.3bt Type-4 PoE powered device (PD) interface IC with integrated 0.1-Ω hot-swap MOSFET, 90-W power handling capability, automatic maintain power signature (MPS), and advanced DC-DC startup control. It operates across –40°C to 125°C and delivers 2.2-A typical current limit for robust inrush and steady-state operation in security cameras and multiband access points.
For engineers reviewing the TPS2373-4RGWT datasheet, TPS2373-4RGWT pinout, TPS2373-4RGWT application, or TPS2373-4RGWT equivalent, this page provides verified technical context, real-world design meanings of key specs, validated pin functions, confirmed alternatives for PoE++ PD designs, and supply-chain support for industrial embedded and connected-device programs.
Technical Context
The TPS2373-4RGWT implements full IEEE 802.3bt Type-4 PD functionality including detection (56.5-µA typical signature), two-event hardware classification, and inrush current limiting (335 mA typical). Its integrated 0.1-Ω MOSFET supports up to 2.2-A continuous current at 125°C junction temperature, enabling 90-W delivery over CAT5 cabling.
Advanced startup logic generates a controlled VC_OUT bias voltage (13.5–15 V) with programmable UVLO thresholds (6.9 V falling, 3.9 V with UVLO_SEL grounded), while automatic MPS dynamically adjusts duty cycle (5.4%, 8.1%, or 12.5%) based on external resistor selection and PSE type-eliminating need for external timing components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IEEE Standard Compliance | IEEE 802.3bt Type-4 (90 W), backward-compatible with Type-3/2/1 |
| Max Continuous Power | 90 W at PSE; ~71.3 W delivered to PD input over 100-m CAT5 cable |
| Pass MOSFET RDS(on) | 0.1 Ω typical - reduces conduction loss and thermal stress in high-current PDs |
| Current Limit | 2.2 A typical - ensures safe operation under worst-case load and ambient conditions |
| Inrush Current Limit | 335 mA typical - meets IEEE 802.3bt inrush timing and amplitude requirements |
| Operating Temperature | –40°C to 125°C junction - supports deployment in outdoor security cameras and base stations |
| Package | 20-pin VQFN (5.0 mm × 5.0 mm) with exposed thermal pad - enables compact, thermally efficient layout |
Pinout & Package
TPS2373-4RGWT uses a 20-pin VQFN package (5.0 mm × 5.0 mm) with exposed thermal pad connected to VSS for enhanced thermal dissipation. The package is RoHS-compliant and rated for reflow soldering per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | PoE input power rail | Connects to positive PoE input; bypassed with 0.1 µF to VSS for noise suppression |
| DEN | Detection enable | 24.9-kΩ pull-up to VDD establishes IEEE-compliant 56.5-µA detection signature |
| CLSA / CLSB | Classification current programming | Resistors to VSS set dual-class signature (e.g., Class 4 + Class 5) for Type-4 identification |
| VSS / RTN | Power return / MOSFET source | VSS pins are ground reference; RTN is MOSFET drain return path to load |
| AMPS_CTL | MPS current amplitude control | Resistor to VSS programs pulsed MPS current (18–38 mA threshold); open = MPS disabled |
| MPS_DUTY | MPS duty cycle select | Resistor to VSS selects 5.4% (open), 8.1% (~60.4 kΩ), or 12.5% (short) duty cycle |
| VC_OUT | DC-DC controller bias supply | Provides 13.5–15 V startup voltage to PWM controller; bypassed with 1 µF to RTN |
| VC_IN | Auxiliary bias input | Accepts 0–15 V auxiliary winding voltage; internal switch enables seamless adapter priority |
| PG | Power Good indicator | Open-drain active-high signal referenced to RTN; asserts after successful startup and UVLO exit |
| TPH / TPL / BT | PSE type indication outputs | Open-drain outputs encode detected PSE type (Type-3/4, mutual ID, allocation level) for system firmware |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 0.1-Ω Hot-Swap MOSFET | Enables 90-W Type-4 PoE operation with <1.2 W conduction loss at 2.2 A, reducing heatsink requirements |
| Automatic Maintain Power Signature (MPS) | Self-adjusting pulsed current generation eliminates external timer ICs and simplifies standby-mode compliance |
| Advanced Startup for DC-DC Controllers | Generates regulated VC_OUT with soft-start behavior and programmable UVLO, allowing use of low-voltage PWM ICs |
| Auxiliary Power Detect (APD) | Priority switchover to external adapter via 1.65-V threshold; forces TPH low and disables BT/TPL for clean handoff |
| Programmable Inrush Timing & Termination | Fixed 81.5-ms delay and 90% termination threshold ensure IEEE 802.3bt startup compliance without tuning |
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 detection, classification, inrush, and 90-W power delivery to downstream DC-DC converters. Use Value: Enables full-feature camera operation without local AC adapter; 0.1-Ω RDS(on) minimizes thermal rise in sealed enclosures. |
Use Scenario: Dual-band (2.4 GHz + 5 GHz) Wi-Fi 6 access point with multiple radios, USB peripherals, and PoE-powered fan. IC Role / Device Role / Timing Role: IEEE 802.3bt Type-4 PD controller coordinating power allocation, MPS maintenance, and auxiliary adapter fallback. Use Value: Supports simultaneous high-power RF stages and cooling; automatic MPS extends battery backup runtime during low-load standby. |
| Pico-Base Stations | Video & 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: High-reliability PoE interface providing thermal shutdown (158°C), robust ESD protection (±8 kV contact), and stable VC_OUT bias. Use Value: Ensures uninterrupted operation in harsh environments; 125°C max junction rating avoids derating in confined housings. |
Use Scenario: Feature-rich desk phone with color display, Bluetooth, and HD voice requiring >30 W sustained power. IC Role / Device Role / Timing Role: Dual-role PD supporting both PoE-only and adapter-priority modes via APD input and seamless TPH/TPH signaling. Use Value: Eliminates user confusion during power transitions; PG output synchronizes firmware boot with stable bias rail availability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PoE PD interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2372-4RGWT | Lacks automatic MPS and advanced startup; fixed 8.1% MPS duty; no VC_IN auxiliary bias input | Suitable for cost-sensitive Type-4 PDs without ultra-low-power standby or adapter priority | Choose when MPS simplicity and auxiliary power handoff are not required; lower BOM count |
| MAX5984AEUI+ | Supports only IEEE 802.3at (Type-2); 30-W max; 0.25-Ω RDS(on); no VC_OUT programmable UVLO | Targeted at mid-power VoIP phones and sensors where 90-W capability is unnecessary | Choose for legacy 802.3at designs or space-constrained layouts needing 16-pin TSSOP |
Compared with TPS2373-4RGWT, TPS2372-4RGWT omits critical Type-4 enhancements like adaptive MPS and auxiliary bias management, while MAX5984AEUI+ lacks Type-4 support entirely-making TPS2373-4RGWT the only option for full 802.3bt feature compliance in demanding 90-W applications.
Availability
TPS2373-4RGWT 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 guaranteed traceable sourcing for industrial deployments.
Supply support for TPS2373-4RGWT 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, signal chain, and connectivity solutions.
The TPS2373 product line delivers integrated IEEE 802.3bt PoE PD interfaces designed specifically for high-power, thermally constrained, and standards-compliant networked devices-including next-generation wireless infrastructure and intelligent edge endpoints.
FAQ
What is the maximum power delivery capability of the TPS2373-4RGWT?
The TPS2373-4RGWT supports IEEE 802.3bt Type-4 operation with up to 90 W sourced from the PSE. Accounting for 100-meter CAT5 cable losses, it delivers approximately 71.3 W to the PD input. This is enabled by its 0.1-Ω typical RDS(on) and 2.2-A current limit, verified across –40°C to 125°C junction temperature.
How does the TPS2373-4RGWT implement automatic Maintain Power Signature (MPS)?
The TPS2373-4RGWT automatically generates MPS current pulses without external timing components. An external resistor on AMPS_CTL sets the pulse amplitude (18–38 mA threshold), while MPS_DUTY selects duty cycle (5.4%, 8.1%, or 12.5%) based on resistor value. The IC detects PSE type and adjusts accordingly-ensuring compliance with Type 1–4 PSEs.
Does the TPS2373-4RGWT support auxiliary power adapter priority?
Yes. The TPS2373-4RGWT features an APD (Auxiliary Power Detect) input that triggers at 1.65 V above RTN. When asserted, it disables the PoE pass MOSFET, forces TPH low, and opens TPL/BT-enabling seamless switchover to an external adapter. This is confirmed in the functional description and pin table of the official datasheet.
What package type and thermal characteristics does the TPS2373-4RGWT use?
The TPS2373-4RGWT uses a 20-pin VQFN package (RGW) measuring 5.0 mm × 5.0 mm with an exposed thermal pad. Its thermal metrics include RθJA = 38.0°C/W and RθJC(bot) = 1.8°C/W, enabling efficient heat transfer to the PCB. The datasheet specifies 125°C max junction temperature and thermal shutdown at 158°C.
Can the TPS2373-4RGWT be used in designs requiring programmable UVLO for the DC-DC controller?
Yes. The TPS2373-4RGWT provides VC_OUT with programmable undervoltage lockout via the UVLO_SEL pin. With UVLO_SEL floating, VC_OUT UVLO falls at 6.9 V; grounding UVLO_SEL lowers it to 3.9 V. This allows direct compatibility with PWM controllers having different UVLO thresholds-confirmed in Section 6.5 of the datasheet.
TPS2373-4RGWT 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)
TPS2373-4RGWT FAQ
1.How can I place an order for TPS2373-4RGWT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2373-4RGWT 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 TPS2373-4RGWT reliable?
The price and inventory of TPS2373-4RGWT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2373-4RGWT is usually 5 days.
3.What payment methods are accepted for TPS2373-4RGWT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2373-4RGWT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2373-4RGWT?
TPS2373-4RGWT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2373-4RGWT 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 TPS2373-4RGWT?
For technical support, including TPS2373-4RGWT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2373-4RGWT requirements.
6.How does Aetrix verify that TPS2373-4RGWT is sourced from the original manufacturer or authorized distributors?
All TPS2373-4RGWT 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 TPS2373-4RGWT meets industry standards.
7.What is the process for return or replacement of TPS2373-4RGWT?
All TPS2373-4RGWT units undergo pre-shipment inspection (PSI). If there is an issue with TPS2373-4RGWT, 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 TPS2373-4RGWT part is unused and in its original packaging.
Return procedure for TPS2373-4RGWT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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