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Texas Instruments TPS2373-3RGWT
- Part No.:
- TPS2373-3RGWT
- Manufacturer:
- Texas Instruments
- Category:
- Power Over Ethernet (PoE) Controllers
- Package:
- 20-VQFN Exposed Pad
- Datasheet:
-
TPS2373-3RGWT.pdf
- Description:
- IC POE CNTRL 1 CHANNEL 20VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:212
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Product details
Overview
TPS2373-3RGWT from Texas Instruments is a high-power IEEE 802.3bt Type-3 PoE powered device (PD) interface IC with integrated 0.3-Ω hot-swap MOSFET, 1.85-A current limit, and advanced DC-DC startup control. It delivers up to 60 W at PD input (51 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 TPS2373-3RGWT datasheet, TPS2373-3RGWT pinout, TPS2373-3RGWT application, or TPS2373-3RGWT equivalent, this device enables robust PoE++ compliance with Type-3 PSEs, simplified bias supply design via VC_OUT/VC_IN, and programmable MPS duty cycle and amplitude - critical for industrial IP cameras and redundant-power systems requiring thermal shutdown protection and auxiliary adapter priority.
Technical Context
The TPS2373-3RGWT implements full IEEE 802.3bt Type-3 PD functionality including detection (56.5 µA typical), two-event hardware classification, and inrush current limiting (200 mA typical). Its internal 0.3-Ω MOSFET sustains 1.85-A continuous current at 125°C junction temperature, with foldback protection triggered at 14.5 V RTN.
Advanced Startup generates a controlled VC_OUT ramp (13.8–15 V) to drive external PWM controllers, reducing required bias capacitor size and enabling long soft-start periods. Automatic MPS uses AMPS_CTL and MPS_DUTY pins to generate pulsed current (5.4%, 8.1%, or 12.5% duty) with amplitude set by external resistor - supporting standby modes below 1 mA system draw.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IEEE Standard Support | Compliant with IEEE 802.3bt Type-3 (60 W) - not Type-4 or legacy 802.3af/at only. |
| Pass MOSFET RDS(on) | 0.3 Ω typical - enables ≥1.55 A continuous current with <1.2 W conduction loss at 1.85 A. |
| Current Limit | 1.85 A typical (min 1.55 A, max 2.2 A) - sets maximum safe load current before foldback activation. |
| Inrush Current Limit | 200 mA typical - meets IEEE 802.3bt inrush timing and peak current requirements during startup. |
| VC_OUT Output | 13.8–15 V startup voltage, 20 mA sourcing capability - directly powers low-voltage PWM controllers without external LDO. |
| Operating Temperature | –40°C to +125°C junction range - validated for outdoor security cameras and industrial base stations. |
| MPS Duty Cycle Options | 5.4% (open), 8.1% (~60.4 kΩ), or 12.5% (short on MPS_DUTY) - selects pulse timing per PSE type and standby budget. |
Pinout & Package
TPS2373-3RGWT is housed in a 20-lead VQFN package (5.00 mm × 5.00 mm) with exposed thermal pad connected to VSS. The package supports high-power dissipation with RθJA = 40.2°C/W and requires PCB copper fill under the pad for thermal reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | PoE input rail connection | Accepts 0–57 V PoE input; bypassed with 0.1 µF to VSS for noise filtering. |
| DEN | Detection enable input | 24.9 kΩ pull-up to VDD establishes 56.5 µA detection signature; pulled to VSS disables MOSFET. |
| CLSA / CLSB | Classification current outputs | Resistor-to-VSS sets Class A/B signature (e.g., 1210 Ω → 2.5 mA); enables Type-3 power negotiation. |
| VSS / RTN | Power return and MOSFET source | VSS (pins 4,5) is logic ground; RTN (pins 11,12) is MOSFET drain return - must be low-inductance path. |
| AMPS_CTL | MPS current amplitude control | Resistor-to-VSS programs pulsed MPS current (18–38 mA threshold); open disables MPS. |
| MPS_DUTY | MPS duty cycle select | Resistor-to-VSS selects 5.4%, 8.1%, or 12.5% duty cycle - matches PSE type (Type 1–2 vs 3–4). |
| VC_OUT | DC-DC controller bias supply | Delivers 13.8–15 V at up to 20 mA; bypassed with 1 µF to RTN - eliminates need for auxiliary winding LDO. |
| VC_IN | Auxiliary bias input | Accepts 0–15 V from transformer auxiliary winding; enables VC switch when >8.5 V - supports adapter priority. |
| PG | Power Good indicator | Open-drain active-high output referenced to RTN - signals stable VC_OUT and completed startup sequence. |
| TPH / TPL / BT | PSE identification outputs | Open-drain, active-low signals indicating Type-3/4 PSE detection (BT), allocated power level (TPL), and power handshake (TPH). |
Key Features
| Feature | Design Value |
|---|---|
| Robust Hotswap MOSFET | 100 V rated, 0.3 Ω typical RDS(on), 1.85 A current limit - handles full Type-3 PoE stress with margin. |
| Advanced Startup Control | Generates regulated 13.8–15 V VC_OUT ramp with 20 mA drive - enables use of low-voltage PWM ICs and reduces bias cap size by >50%. |
| Automatic Maintain Power Signature | Programmable MPS duty (5.4–12.5%) and amplitude (via AMPS_CTL resistor) - maintains PSE power in sub-1 mA standby without external timer. |
| Auxiliary Adapter Priority | APD input disables PoE pass MOSFET and forces TPH low when >1.82 V applied - ensures seamless switchover to external 12 V adapter. |
| Thermal Shutdown Protection | Triggers at 158°C with 20°C hysteresis - prevents damage during sustained overload or poor heatsinking in enclosed enclosures. |
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 MPS - provides VC_OUT bias to DC-DC converter driving image sensor and SoC. Use Value: Enables 60 W power delivery with thermal shutdown and auxiliary adapter fallback - eliminates need for local AC/DC adapter in pole-mounted installations. |
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: Type-3 PD controller coordinating power allocation across RF chains and baseband processor - signals PSE-allocated power level via TPL/TPH outputs. Use Value: Supports simultaneous high-power RF operation and low-power sleep states using programmable MPS - extends battery backup runtime during grid outages. |
| Video Telephony Systems | Redundant-Power Industrial Gateways |
|
Use Scenario: Enterprise VoIP phone with HD video conferencing, touchscreen UI, and USB peripheral support. IC Role / Device Role / Timing Role: PoE PD managing power sequencing, PG signaling to system MCU, and MPS maintenance during call hold/sleep. Use Value: Delivers stable 13.8 V VC_OUT to power management IC - eliminates separate bias supply and simplifies BOM for compact desktop form factor. |
Use Scenario: DIN-rail mounted industrial gateway with dual PoE inputs and 4G/LTE failover, operating in factory automation environments. IC Role / Device Role / Timing Role: One of two parallel TPS2373-3RGWT units providing independent PoE input paths - coordinated via PG and BT signals for redundancy arbitration. Use Value: Enables hot-swappable dual-PoE architecture with automatic switchover and thermal derating - meets IEC 61000-6-2 immunity and -40°C cold-start requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PoE PD interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2372-3RGWT | Lacks Advanced Startup and automatic MPS; fixed 5.4% MPS duty; no VC_IN/VC_OUT bias control. | Suitable only for basic Type-3 PDs without DC-DC soft-start or ultra-low standby needs. | Choose TPS2372-3RGWT only if cost sensitivity outweighs bias supply simplification and MPS flexibility. |
| MAX5984DEWI+T | Supports IEEE 802.3bt Type-3 but uses external MOSFET; no integrated VC_OUT regulator; different classification programming. | Requires discrete FET, gate driver, and bias LDO - increases layout complexity and component count. | Select MAX5984DEWI+T when discrete FET selection or multi-rail biasing is required beyond TPS2373-3RGWT's integrated capability. |
Compared with TPS2373-3RGWT, TPS2372-3RGWT omits critical features for modern DC-DC integration (Advanced Startup, VC_OUT regulation), while MAX5984DEWI+T trades integration for flexibility - making TPS2373-3RGWT optimal for compact, thermally constrained Type-3 PDs needing minimal external components and programmable standby.
Availability
TPS2373-3RGWT is available at Aetrix Electronics and suitable for security cameras, multiband access points, and video telephony systems requiring stable component supply, extended temperature operation, and IEEE 802.3bt Type-3 compliance.
Supply support for TPS2373-3RGWT 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 and embedded processing technologies, with decades of expertise in power management and connectivity solutions.
The TPS2373 product line delivers integrated PoE PD interfaces optimized for IEEE 802.3bt Type-3 and Type-4 applications - designed to reduce system cost, simplify thermal design, and accelerate time-to-market for high-power networked devices.
FAQ
What is the maximum continuous power supported by the TPS2373-3RGWT?
The TPS2373-3RGWT supports IEEE 802.3bt Type-3 operation up to 60 W delivered by the PSE. Accounting for 100-meter CAT5 cable loss, it delivers 51 W at the PD input. This is enabled by its 0.3-Ω MOSFET and 1.85-A current limit, verified across –40°C to 125°C junction temperature.
How does the TPS2373-3RGWT implement automatic Maintain Power Signature (MPS)?
The TPS2373-3RGWT implements automatic MPS using the AMPS_CTL and MPS_DUTY pins. An external resistor on AMPS_CTL sets the pulsed current amplitude (18–38 mA threshold), while MPS_DUTY selects duty cycle (5.4%, 8.1%, or 12.5%). This eliminates external timers and supports ultra-low standby modes without firmware intervention.
Can the TPS2373-3RGWT operate with an external 12 V adapter?
Yes - the TPS2373-3RGWT supports auxiliary adapter priority via the APD pin. Applying >1.82 V to APD disables the internal MOSFET, forces TPH low, and allows the external adapter to power the system. VC_IN accepts 0–15 V input, enabling direct use of transformer auxiliary windings or regulated adapters.
What is the purpose of the VC_OUT and VC_IN pins on the TPS2373-3RGWT?
VC_OUT delivers a regulated 13.8–15 V bias supply (20 mA capable) to drive external PWM controllers, eliminating need for a separate LDO. VC_IN accepts 0–15 V from an auxiliary winding or adapter; when >8.5 V, it activates the internal VC switch to enable VC_OUT - forming a seamless adapter-fallback path.
Does the TPS2373-3RGWT include thermal protection?
Yes - the TPS2373-3RGWT includes thermal shutdown that activates at 158°C junction temperature with 20°C hysteresis. This protects against sustained overload, poor PCB heatsinking, or ambient temperature extremes in enclosed enclosures such as security camera housings or industrial gateways.
TPS2373-3RGWT 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:
- 60 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)
TPS2373-3RGWT FAQ
1.How can I place an order for TPS2373-3RGWT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2373-3RGWT 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 TPS2373-3RGWT reliable?
The price and inventory of TPS2373-3RGWT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2373-3RGWT is usually 5 days.
3.What payment methods are accepted for TPS2373-3RGWT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2373-3RGWT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2373-3RGWT?
TPS2373-3RGWT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2373-3RGWT 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 TPS2373-3RGWT?
For technical support, including TPS2373-3RGWT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2373-3RGWT requirements.
6.How does Aetrix verify that TPS2373-3RGWT is sourced from the original manufacturer or authorized distributors?
All TPS2373-3RGWT 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 TPS2373-3RGWT meets industry standards.
7.What is the process for return or replacement of TPS2373-3RGWT?
All TPS2373-3RGWT units undergo pre-shipment inspection (PSI). If there is an issue with TPS2373-3RGWT, 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 TPS2373-3RGWT part is unused and in its original packaging.
Return procedure for TPS2373-3RGWT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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