My Inquiry
My Account
Texas Instruments TPS2376PW
- Part No.:
- TPS2376PW
- Manufacturer:
- Texas Instruments
- Category:
- Power Over Ethernet (PoE) Controllers
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS2376PW.pdf
- Description:
- IC POE CNTRL 1 CHANNEL 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,834
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS2376PW from Texas Instruments is an IEEE 802.3af-compliant Powered Device (PD) controller IC for Power over Ethernet applications, integrating a 0.58-Ω low-side MOSFET switch, programmable UVLO via dedicated UVLO pin, fixed 450-mA operational current limit, and open-drain power-good (PG) output. It operates across –40°C to 85°C and supports Class 3 PD implementations in VoIP phones, WLAN access points, and security cameras.
For engineers reviewing the TPS2376PW datasheet, TPS2376PW pinout, TPS2376PW application, or TPS2376PW equivalent, key selection considerations include its adjustable UVLO threshold (1.93 V / 2.49 V), 100-V absolute maximum RTN voltage rating, 15-kV system-level ESD capability, and TSSOP-8 package compatibility with PoE front-end designs requiring inrush control and classification.
Technical Context
The TPS2376PW implements detection, classification, and power delivery sequencing using internal comparators with hysteresis for stable state transitions between detection (1.4–11.3 V), classification (13–21 V), and powered operation (>21 V). Its UVLO comparator connects directly to the external UVLO pin-not an internal divider-enabling independent adjustment of upper (38.4–40.4 V) and lower (29.6–31.5 V) thresholds via resistor divider.
It integrates a 0.58-Ω, 100-V low-side pass device with thermal shutdown (135°C), programmable inrush current limiting (via ILIM pin and 62.5–500 kΩ resistor), and open-drain PG reporting referenced to RTN. Classification current is set by external CLASS resistor (255–4420 Ω), supporting IEEE 802.3af Classes 0–4.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| UVLO Thresholds | Programmable: 1.93 V (falling), 2.49 V (rising) at UVLO pin; enables custom turn-on/turn-off margins for legacy PSEs |
| Operational Current Limit | Fixed 450-mA (typical) RTN sinking current; ensures compliance with IEEE 802.3af PSE current-limiting requirements |
| Inrush Current Control | Adjustable via ILIM pin: 100–180 mA (typical) with 178 kΩ resistor; prevents input voltage sag during bulk capacitor charging |
| Pass Device RDS(on) | 0.58 Ω (typical) at 300 mA; minimizes conduction loss and thermal rise in PoE-powered load paths |
| ESD Rating | 15-kV system-level (contact/air) per EN61000-4-2; protects RJ-45 interface against real-world handling and surge events |
| Package | TSSOP-8 (PW); 3.0 × 4.4 mm footprint with 0.65 mm pitch; optimized for space-constrained PoE endpoint PCB layouts |
| Operating Temperature | –40°C to +85°C ambient; validated for industrial-grade deployment in uncontrolled environments |
Pinout & Package
TSSOP-8 (PW) package with exposed thermal pad (not electrically connected); 0.65 mm lead pitch; 3.0 mm × 4.4 mm body size; RoHS-compliant, green molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ILIM (Pin 1) | Inrush current programming input | Connects to VSS via resistor (62.5–500 kΩ) to set start-up inrush limit; must not be left open or shorted |
| CLASS (Pin 2) | Classification current source | Sinks current through external resistor (255–4420 Ω) to signal IEEE 802.3af Class 0–4 power level to PSE |
| DET (Pin 3) | Detection signature output | Pulls to VSS via internal switch during detection (1.4–11.3 V); forms 24.9-kΩ signature with R(DET) to VDD |
| VSS (Pin 4) | Input return reference | Local ground for detection/classification circuitry; tied to PSE negative rail before diode bridge |
| RTN (Pin 5) | Switched load return | Low-side output node for downstream DC/DC converter; carries full operational current (≤450 mA) |
| PG (Pin 6) | Open-drain power-good | Asserts high-impedance when RTN enabled and not in inrush; requires external pullup for logic-level signaling |
| UVLO (Pin 7) | Adjustable UVLO input | Accepts resistor divider from VDD to VSS; sets custom upper/lower lockout thresholds (TPS2376-specific function) |
| VDD (Pin 8) | Positive input supply | Rectified PSE voltage input (0–57 V); powers internal circuitry and serves as reference for all comparators |
Key Features
| Feature | Design Value |
|---|---|
| Programmable UVLO | Enables precise turn-on/turn-off voltage alignment with nonstandard PSEs via external resistor divider on UVLO pin |
| Integrated low-side switch | 0.58-Ω RDS(on), 100-V rated MOSFET eliminates need for discrete pass device and reduces BOM count |
| IEEE 802.3af compliance | Fully implements detection (25 kΩ signature), classification (5-class), and maintain-power-signature (MPS) timing without external logic |
| Thermal protection | Internally latched shutdown at 135°C with 20°C hysteresis; prevents damage during sustained overload or poor heatsinking |
| 15-kV system ESD | Validated per EN61000-4-2 at RJ-45 interface; eliminates need for external TVS diodes in many PoE endpoint designs |
Applications
| VoIP Phones | WLAN Access Points |
|---|---|
Use Scenario: Powered via Category 5/6 Ethernet cable in enterprise office deployments with centralized PoE switches. IC Role / Device Role / Timing Role: PD controller managing detection, classification, and regulated power delivery to baseband processor and audio codec. Use Value: Enables single-cable deployment with no local AC adapter; programmable UVLO ensures reliable startup even with long cable runs causing >5 V drop. | Use Scenario: Ceiling-mounted wireless infrastructure units drawing up to 12.95 W from midspan or endspan PSEs. IC Role / Device Role / Timing Role: Front-end power manager enabling Class 3 classification and inrush-limited power-up of RF transceivers and MAC processors. Use Value: 0.58-Ω RDS(on) minimizes conduction loss at 350 mA typical load current, improving thermal margin in enclosed enclosures. |
| Security Cameras | POS Terminals |
Use Scenario: Outdoor IP cameras with IR illumination requiring stable 12 V or 24 V DC output from PoE input. IC Role / Device Role / Timing Role: Primary PD interface controlling power sequencing to isolated DC/DC converter and image sensor subsystem. Use Value: 15-kV system-level ESD rating protects against lightning-induced surges on outdoor Ethernet runs without added protection components. | Use Scenario: Retail point-of-sale terminals deployed in multi-drop PoE networks with mixed PSE generations. IC Role / Device Role / Timing Role: Adaptive PD controller supporting both IEEE-compliant and legacy PSEs via adjustable UVLO thresholds. Use Value: UVLO pin allows fine-tuning to match older PSEs with 36–40 V output range, avoiding brownout resets during peak load transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Powered Device controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2375PW | Fixed UVLO thresholds (30.5 V / 39.3 V); no UVLO pin; identical pinout and RDS(on) | Better suited for new designs targeting only IEEE 802.3af-compliant PSEs with stable ≥44 V output | Select TPS2375PW if UVLO adjustability is unnecessary and cost optimization is prioritized |
| TPS2377PW | Legacy UVLO thresholds (30.5 V / 35.1 V); no UVLO pin; same package and functional block diagram | Optimized for older PSEs with lower output voltage; reduced hysteresis increases risk of oscillation with slow-rising inputs | Choose TPS2377PW only when field interoperability with pre-2003 PSE hardware is mandatory |
Compared with TPS2375PW and TPS2377PW, the TPS2376PW uniquely provides external UVLO threshold adjustment while retaining full IEEE 802.3af detection/classification functionality-making it the only option among the three that supports both legacy and modern PSEs without design iteration.
Availability
TPS2376PW is available at Aetrix Electronics and suitable for VoIP phones, WLAN access points, security cameras, and POS terminals requiring stable component supply with guaranteed long-term PoE controller availability.
Supply support for TPS2376PW 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, embedded processing, and connectivity technologies with over 50 years of power management leadership.
The TPS237x family was designed specifically for IEEE 802.3af Power over Ethernet Powered Device applications, delivering integrated detection, classification, inrush control, and power switching in compact SOIC/TSSOP packages.
FAQ
What is the primary function of the UVLO pin on the TPS2376PW?
The UVLO pin on the TPS2376PW accepts an external resistor divider from VDD to VSS to set custom upper and lower undervoltage lockout thresholds-unlike the fixed-threshold TPS2375PW and TPS2377PW. This enables reliable startup with legacy PSEs delivering as low as 36 V while maintaining hysteresis. The TPS2376PW uses this pin exclusively; it is unconnected on other family members.
Does the TPS2376PW support IEEE 802.3af Class 4 power classification?
Yes, the TPS2376PW supports Class 4 via a 255-Ω ±1% resistor from CLASS pin to VSS, drawing 38.0–41.2 mA during classification-within the IEEE 802.3af 36–44 mA specification. This enables up to 12.95 W delivered to the PD load, and the TPS2376PW's 450-mA operational current limit accommodates the required headroom.
Can the TPS2376PW be used with a 100-V input voltage on the RTN pin?
No-the TPS2376PW's absolute maximum RTN voltage rating is 100 V, but its recommended operating range is 0–57 V. Sustained operation above 57 V violates the datasheet's recommended conditions and risks reliability degradation. The 100-V rating is a stress limit for transient events, not a continuous operating specification for the TPS2376PW.
How does the TPS2376PW implement inrush current limiting?
The TPS2376PW implements inrush current limiting by connecting a resistor (62.5–500 kΩ) from ILIM pin to VSS. With a 178-kΩ resistor, it limits inrush to 100–180 mA (typical), preventing input voltage sag during bulk capacitor charging. The TPS2376PW terminates inrush when RTN current falls below 85–100% of the set limit, then enables full-current operation-ensuring compatibility with legacy PSEs.
Is the TPS2376PW pin-compatible with the TPS2375PW and TPS2377PW?
Yes-the TPS2376PW is pin-compatible with TPS2375PW and TPS2377PW in the TSSOP-8 (PW) package, sharing identical pin numbering and functions for ILIM, CLASS, DET, VSS, RTN, PG, and VDD. Pin 7 is UVLO on TPS2376PW but NC on the others; this requires board-level routing changes only if UVLO adjustment is implemented, otherwise it may be left unconnected.
TPS2376PW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- Controller (PD)
- Number of Channels:
- 1
- Power - Max:
- 12.95 W
- Internal Switch(s):
- Yes
- Auxiliary Sense:
- No
- Standards:
- 802.3af (PoE)
- Voltage - Supply:
- 0V ~ 57V
- Current - Supply:
- 240µA
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
TPS2376PW FAQ
1.How can I place an order for TPS2376PW through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2376PW 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 TPS2376PW reliable?
The price and inventory of TPS2376PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2376PW is usually 5 days.
3.What payment methods are accepted for TPS2376PW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2376PW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2376PW?
TPS2376PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2376PW 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 TPS2376PW?
For technical support, including TPS2376PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2376PW requirements.
6.How does Aetrix verify that TPS2376PW is sourced from the original manufacturer or authorized distributors?
All TPS2376PW 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 TPS2376PW meets industry standards.
7.What is the process for return or replacement of TPS2376PW?
All TPS2376PW units undergo pre-shipment inspection (PSI). If there is an issue with TPS2376PW, 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 TPS2376PW part is unused and in its original packaging.
Return procedure for TPS2376PW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS2376PW 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…
