TPS2375PW-1 - IEEE 802.3af PoE PD Controller, 100V | Texas Instruments
MPN: TPS2375PW-1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.31 | $2.31 |
| 10 | $2.1 | $21.00 |
| 100 | $1.85 | $185.00 |
| 500 | $1.62 | $810.00 |
| 1,000 | $1.45 | $1,450.00 |
TPS2375PW-1 Overview
Power over Ethernet is a technology defined by the IEEE 802.3af standard that delivers DC power alongside data over standard Category 5 Ethernet cabling. A PoE system consists of Power Sourcing Equipment (PSE), such as a PoE switch or midspan injector, and a Powered Device (PD), such as an IP camera, wireless access point, or VoIP phone. The PD controller is the interface IC that performs detection, classification, and inrush-current control so the PSE can safely identify and power the end device. It sits at the entry point of the PD power path, ahead of the isolated DC-DC converter that generates the system rails, and therefore forms part of the broader power management IC hierarchy.
Key features of the TPS2375PW-1 include full compliance with the IEEE 802.3af specification, with device thresholds offset by 1.5 V from the standard to account for input diode-bridge drops, ensuring polarity-insensitive operation. The -1 suffix denotes second-generation silicon with a 100-V absolute maximum rating and a true open-drain power-good (PGB) output. Its defining differentiator is auto-retry: after an overcurrent fault, the device automatically attempts to re-enable the pass MOSFET instead of latching off, eliminating the need for a power cycle. An integrated 0.58-ohm sense element plus classification resistor support (Class 0-3, up to 12.95 W at the PD) reduces external component count.
Architecturally, the controller integrates the detection and classification signature circuits, a 57-V rated hot-swap pass-element gate driver, current-limit and foldback protection, and thermal shutdown. The DETC pin manages detection behavior and the CLS pin programs the power class. During startup, controlled gate slew limits inrush current so the PSE is not tripped by capacitor charging; during a fault, the current limit engages and the auto-retry timer restarts the pass element once the fault clears.
Typical applications include IP network cameras, 802.11 wireless access points, VoIP telephones, and PoE-enabled lighting or access-control nodes - anywhere a device must draw 13 W or less from an Ethernet port. The part pairs naturally with a flyback or forward converter to generate isolated low-voltage rails.
A key design consideration is sizing the bulk input capacitance so inrush stays within the PSE inrush budget, and ensuring the external pass MOSFET and TVS diode meet the 100-V transient environment. Prices on this page are as of 2026-10-19 (LCSC from $2.3057).
This page synthesizes distributor pricing, drop-in alternatives, practical design notes, and comparison data not found in the manufacturer datasheet alone.
Drop-in alternatives for TPS2375PW-1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with TPS2375PW-1 (same form factor and footprint) — differing in Function, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TPS2377PW-1
✅ Drop-In📋 Reference alternative (not in catalog)
TPS2375PW
✅ Drop-In📋 Reference alternative (not in catalog)
TPS2377PW
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS2376PW
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS2378PW
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS2375PW-1 Maximum Ratings & Electrical Characteristics
| Function | IEEE 802.3af PoE Powered Device (PD) Controller with Auto-Retry |
| PoE Standard | IEEE 802.3af |
| Number of Channels | 1 |
| Input Voltage Range | 0 V to 57 V |
| Absolute Maximum Rating | 100 V (second-generation silicon) |
| Max Power Class Supported | Class 3, 12.95 W at PD (13 W class rating) |
| Fault Recovery | Auto-retry after current-limit fault |
| Power Good Output | True open-drain (PGB) |
| Internal Sense Element | 0.58 ohm integrated |
| Threshold Offset | 1.5 V offset from IEEE 802.3af limits (diode-bridge compensation) |
| Operating Temperature | -40C to +85C |
| Package | TSSOP-8 (PW) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
TPS2375PW-1 Pin Configuration
| Pin 1 | VDD — PoE input supply from diode bridge (0 V to 57 V operating) |
| Pin 2 | VSS — Controller ground / detection reference |
| Pin 3 | RTN — Powered-device system return, switched by pass MOSFET path |
| Pin 4 | DETC — Detection and class signature / AC disconnect pin |
| Pin 5 | CLS — Class programming pin (resistor to VSS sets power class) |
| Pin 6 | FRS — Fault / retry and rate-of-rise sensing pin |
| Pin 7 | GATE — Gate drive for external PoE pass MOSFET |
| Pin 8 | PGB — True open-drain power-good output |
Typical Applications
TPS2375PW-1 is suitable for 6 applications: IP Network Cameras, Wireless Access Points, VoIP Telephones, PoE LED Lighting Fixtures, Building Access Control and Security Nodes, Industrial Ethernet Sensors and IoT Gateways.
IP Network Cameras
The TPS2375PW-1 is a natural fit for IP surveillance cameras, which almost universally draw less than the device's Class 3 limit of 12.95 W (13 W class rating at the PD). The controller performs 802.3af detection and classification on the Ethernet pair, limits inrush so the PSE port is not tripped during bulk-capacitor charging, and its true open-drain power-good output gates the downstream isolated flyback converter. The auto-retry function is especially valuable in surveillance deployments: a transient camera fault (heater surge, IR-LED bank switching) self-recovers without a site visit, since the pass MOSFET is automatically re-enabled after the retry interval rather than latching off. Designers should place the TVS diode and input diode bridge ahead of the controller, noting the TI-specified 1.5-V threshold offset compensates bridge losses.
Recommended
Wireless Access Points
802.11 access points commonly source power from a PoE switch using the 802.3af Class 3 budget, making the TPS2375PW-1 an ideal PD front end. Its 0 V to 57 V input range tolerates the full PSE voltage window, and the 100-V second-generation rating adds margin against long-cable transient events. The DETC and CLS pins implement the standard detection and class signature so the switch allocates the correct power. Because APs run 24/7 outdoors or on ceilings, the auto-retry fault recovery of the -1 version avoids hard lockups after RF power-amplifier current spikes; the true open-drain power-good output lets the AP's main DC-DC converter enable cleanly once PoE power is validated. With only an external bridge, pass MOSFET, and bulk capacitors, BOM cost stays low in high-volume AP platforms.
Recommended
VoIP Telephones
Enterprise VoIP phones are the canonical 802.3af powered device, and the TPS2375PW-1 handles their entire PoE front end. The phone's class signature (typically Class 2 or 3, up to 12.95 W) is programmed via the CLS pin, and detection thresholds offset 1.5 V from the IEEE limits per TI documentation ensure reliable discovery through the mandatory input diode bridge. The auto-retry feature matters here because phones often experience reset-drawn current transients during firmware updates or headset plug events; recovery is automatic rather than requiring a PoE port re-negotiation. The power-good output sequences the phone's audio and CPU rails, preventing boot glitches on marginal switches. Design the bulk capacitance so inrush remains inside the PSE inrush budget while maintaining hold-up for Ethernet isolation requirements.
Recommended
PoE LED Lighting Fixtures
PoE-driven LED luminaires use 802.3af Class 3 power (up to 12.95 W) for connected-lighting systems, and the TPS2375PW-1 provides the compliant PD interface. The controller's detection and classification signature tells the PoE switch to allocate lighting power, while the 57-V operating range and 100-V transient rating suit long ceiling cable runs with inductive spikes. Its auto-retry behavior suits lighting availability requirements: after a driver-level overcurrent event, the luminaire relights automatically. The true open-drain power-good output enables the LED driver stage only after PoE is validated, preventing dim flicker during PSE connection bounce. Pair the controller with a constant-current buck LED driver fed from an isolated converter, and size the input TVS per the datasheet surge guidance for luminaire environments.
Recommended
Building Access Control and Security Nodes
Door controllers, card readers, and sensor hubs increasingly use PoE for both data and power, typically within the 13 W Class 3 envelope that the TPS2375PW-1 supports. The device's wide -40C to +85C operating range covers unconditioned closets and outdoor gate locations. Its 1.5-V threshold offset relative to IEEE 802.3af limits, specified by TI to accommodate the input diode bridge, keeps detection robust with the polarity-protection components these installations require. The auto-retry fault recovery is valuable in security infrastructure because a transient short on a reader harness self-heals without dispatching a technician. The open-drain power-good flag sequences the node's microcontroller and lock-driver supplies, and its low TSSOP-8 footprint fits the dense PCBs typical of access-control main boards.
Recommended
Industrial Ethernet Sensors and IoT Gateways
Factory-floor sensors and small IoT gateways benefit from single-cable PoE deployment, and the TPS2375PW-1 supplies the standards-compliant PD interface within a 13 W budget. The 100-V second-generation rating gives robustness against the harsher transient environments of industrial Ethernet runs, and the 0 V to 57 V operating window covers all compliant PSE outputs. Auto-retry after current-limit faults keeps remote sensor nodes online after motor-start-induced transients on shared infrastructure. The true open-drain power-good output coordinates startup of the gateway's isolated flyback and downstream logic rails. Engineers should follow TI's typical-application layout: short sense-path traces, star-grounding at RTN, and ceramic decoupling at VDD, to keep detection measurements clean through the bridge and bulk capacitance.
Recommended
Recommended Products Summary
Engineering reference data for TPS2375PW-1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS2377PW-1 | TPS2375PW | TPS2377PW | TPS2376PW | TPS2378PW |
|---|---|---|---|---|---|---|
| Package | TSSOP-8 (PW) | TSSOP-8 (PW) - same | TSSOP-8 (PW) - same | TSSOP-8 (PW) - same | TSSOP-8 (PW) - same | TSSOP-8 (PW) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| PoE Standard / Thresholds | IEEE 802.3af thresholds | Legacy thresholds | IEEE 802.3af thresholds | Legacy thresholds | Legacy / midspan-oriented thresholds | Newer-generation thresholds (higher power) |
| Fault Protection Mode | Auto-retry | Auto-retry | Latch protection | Latch protection | Latch protection | Latch protection |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Key Differentiators
- Auto-retry fault recovery eliminates field service calls (vs TPS2375PW)
- 100-V rating and true open-drain power-good (vs TPS2375PW)
- Standards-compliant detection for modern PoE switches (vs TPS2377PW-1)
Design Notes
The TPS2375 family specifications incorporate a 1.5-V voltage offset from the IEEE 802.3af limits specifically to accommodate the input diode-bridge drops required for PD polarity insensitivity (per the TI product page). Do not add extra series diodes beyond the assumed bridge, or detection thresholds may be shifted out of range. Also, specify the -1 suffix explicitly in the BOM: TPS2375PW (latch) and TPS2375PW-1 (auto-retry, 100 V, open-drain PG) behave differently in fault conditions despite the same footprint.
Place the input diode bridge, TVS diode, bulk capacitor, and the TPS2375PW-1 close together on the hot-swap path. Keep the VSS-to-RTN sense routing short and Kelvin-connected so the integrated 0.58-ohm sense element measures load current accurately. The GATE trace to the external pass MOSFET should be short to limit ringing during inrush control, and the PGB open-drain output needs a pull-up to the logic rail of the downstream controller. Follow the typical-application layout in the TI TPS2375/6/7 data sheet (SLVS525A family doc).
Estimate: size bulk input capacitance so inrush current stays within the IEEE 802.3af PSE inrush budget (approximately 150 mA to 400 mA window per the standard) given your operating voltage - a larger bulk cap charges more slowly through the controlled GATE slew but improves hold-up. With a Class 3 load of 12.95 W at 48 V nominal, average PD input current is roughly 0.27 A, so the external pass MOSFET can be a low-cost SOT-223/SOT-23 device, but it must be rated for the 100-V transient environment alongside the TVS.
Compliance Information
RoHS compliant / lead-free per standard TI PW packaging offered at DigiKey and LCSC. REACH and halogen-free status not stated in retrieved data - confirm on TI.com product page.
