TPS23753A - IEEE 802.3at PoE PD Interface + DC-DC Controller | TI
MPN: TPS23753A ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.45 | $2.45 |
| 10 | $2.2 | $22.00 |
| 100 | $1.86 | $186.00 |
| 500 | $1.62 | $810.00 |
| 1,000 | $1.42 | $1,420.00 |
TPS23753A Overview
A PoE powered-device interface is the front-end circuit that safely extracts power from an Ethernet cable. It performs detection, classification, inrush limiting, and load switching per the IEEE 802.3af/802.3at standards, then hands regulated power to an isolated (or non-isolated) DC-DC converter stage. Within the power-management hierarchy, the TPS23753A belongs to the PoE controller family that integrates both the PD interface and the PWM controller in a single semiconductor device, reducing external component count versus discrete two-chip solutions.
Key features include a complete IEEE 802.3at-compliant PoE interface with enhanced ESD ride-through capability, an integrated robust 100-V, 0.7-ohm hotswap MOSFET that eliminates a discrete external FET, programmable switching frequency with synchronization support for noise-sensitive designs, and adapter ORing support with 12-V adapter operation for auxiliary-power architectures.
On the technical side, the device uses a current-mode control architecture optimized for isolated flyback and forward converter topologies, which simplifies transformer-based designs commonly used in PoE PD applications. The hotswap MOSFET integration reduces BOM cost and board area, while the ESD enhancements improve field robustness on long Ethernet cable runs where surge and ESD events are common. Type 1 compliance means the device advertises and manages up to 13 W at the PD input, a superset of the original IEEE 802.3af requirements.
Typical applications include IP security cameras, IP telephones, wireless access points, and networked industrial sensors, where the TPS23753A converts PoE line power into one or more isolated low-voltage rails for the system electronics.
Design consideration: because the integrated 100-V hotswap MOSFET handles the full PD input current, verify inrush and thermal margins at your maximum load; the 13-W type 1 budget must cover converter efficiency losses, so plan the transformer and output design around roughly 10-12 W of usable output power.
This page synthesizes distributor availability data, the TI/TI-E2E-verified distinction between TPS23753 and TPS23753A, drop-in alternative analysis, and practical design guidance not found in the manufacturer datasheet. Pricing shown is as of 2026-10-19.
Drop-in alternatives for TPS23753A — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TPS23753
✅ Drop-In📋 Reference alternative (not in catalog)
TPS23753APWR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS23754
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS23753A Maximum Ratings & Electrical Characteristics
| Function | PoE PD Interface + Current-Mode DC-DC Controller |
| PoE Standard | IEEE 802.3at (Type 1), superset of IEEE 802.3af / 802.3-2008 |
| PD Power Class | 13 W, Type 1 PD |
| Integrated Hotswap MOSFET | 100 V, 0.7 ohm |
| Control Topology | Current-mode, optimized for isolated converters |
| Switching Frequency | Programmable with synchronization |
| ESD Immunity | Enhanced ESD ride-through capability |
| Adapter ORing Support | Yes |
| Auxiliary Adapter Support | 12-V adapter support |
| Package | 14-TSSOP (PW) |
| Mounting Type | Surface Mount |
| Evaluation Module | TPS23753AEVM-001 / TPS23753AEVM-004 |
TPS23753A 14-tssop (pw) Pin Configuration Guide
Pin configuration for TPS23753A (14-tssop (pw) package). This power device features gate, drain, and source terminals. For non-polarized packages, refer to the manufacturer datasheet for exact pin 1 orientation and footprint details. Common applications include power supply design, motor driving, and load switching.
No detailed pinout data available for TPS23753A.
Refer to the datasheet for full pin configuration.
Typical Applications
TPS23753A is suitable for 6 applications: IP Security Cameras, IP Telephones and VoIP Endpoints, Wireless Access Points, Industrial Networked Sensors and Controllers, Building Automation and Access Control, PoE Intermediate Power Solutions (Adapter ORing Systems).
IP Security Cameras
IP network cameras are the flagship application for the TPS23753A because they draw well within the 13-W type 1 PoE budget while requiring an isolated low-voltage rail for the image sensor, ISP, and compression electronics. The device's current-mode controller drives an isolated flyback converter that generates 5 V or 3.3 V from the 48-V PoE line, while the integrated 100-V, 0.7-ohm hotswap MOSFET handles IEEE 802.3at detection, classification, and inrush limiting in one chip. The enhanced ESD ride-through capability is particularly valuable here: outdoor cameras sit on long cable runs where surge and ESD events are frequent. Typical designs deliver roughly 10-12 W of usable output power after converter efficiency losses, sufficient for full-featured cameras with IR illuminators.
Recommended
IP Telephones and VoIP Endpoints
VoIP desk phones extract power directly from the Ethernet switch, and the TPS23753A provides the complete PD front end plus isolated converter control in one 14-TSSOP package, minimizing PCB area inside the phone housing. The 13-W type 1 allocation comfortably covers phone electronics, display, and handset amplification. The adapter ORing support and 12-V adapter capability let designers add a local wall-adapter fallback path that seamlessly takes over when PoE power is absent - a requirement in many enterprise phone deployments. Programmable switching frequency with synchronization allows the flyback switching frequency to be placed away from sensitive audio bands, preventing audible noise coupling into the handset, a practical advantage over fixed-frequency PoE controllers.
Recommended
Wireless Access Points
Enterprise and campus wireless access points are frequently ceiling- or wall-mounted with only an Ethernet cable available, making PoE the natural power source. The TPS23753A's 13-W type 1 budget suits single-radio 802.11n-class access points, and its isolated flyback architecture provides the galvanic isolation required when the AP's Ethernet port connects to grounded network infrastructure. The integrated 100-V hotswap MOSFET withstands the PoE rail plus transients without an external FET, saving space in slim AP enclosures. Because radios are sensitive to supply ripple, the synchronization feature lets designers lock the converter switching frequency away from RF channel bands, reducing spurious emissions and simplifying conducted-emissions compliance testing.
Recommended
Industrial Networked Sensors and Controllers
Factory-floor sensors, gateways, and small PLCs increasingly use PoE to combine data and power over a single cable, cutting installation cost. The TPS23753A fits these designs because its enhanced ESD ride-through and 100-V MOSFET margin tolerate the harsher electrical environments of industrial Ethernet runs, while the current-mode controller supports the rugged isolated flyback topologies preferred for industrial isolation requirements. The adapter ORing feature supports 12-V auxiliary backup power for sensors that must ride through PoE switch reboots. Designs typically derive a 5-V intermediate rail at up to roughly 10-12 W, then use point-of-load regulators for 3.3-V and 1.8-V logic, keeping the isolated stage simple and efficient.
Recommended
Building Automation and Access Control
Door controllers, card readers, and HVAC zone controllers benefit from PoE because door and ceiling locations rarely have convenient AC outlets. The TPS23753A provides the IEEE 802.3at type 1 PD interface, detection, classification, and inrush management with its integrated hotswap MOSFET, plus the isolated converter control needed to safely separate the building network from controller electronics. The 13-W budget covers typical access-control panels and damper actuators. The device's programmable frequency and synchronization help meet building-system EMC requirements, and the enhanced ESD robustness suits the long, electrically noisy cable runs common in commercial buildings. A 12-V adapter input via the ORing feature adds redundancy for critical access points.
Recommended
PoE Intermediate Power Solutions (Adapter ORing Systems)
Systems that combine PoE with a local 12-V wall adapter use the TPS23753A's adapter ORing support to prioritize power sources automatically. The PD interface manages the PoE path while the ORing circuitry seamlessly selects the adapter when present, avoiding back-feeding between sources. The 12-V adapter support is built into the same controller, eliminating a separate source-selection IC. This architecture is common in products that ship without PoE switches (using an adapter initially) but gain PoE capability when connected to powered infrastructure. The current-mode DC-DC controller then converts whichever source wins into the required isolated system rails, giving designers a single-chip dual-source power architecture in a 14-TSSOP footprint.
Recommended
Recommended Products Summary
Engineering reference data for TPS23753A — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS23753 | TPS23753APWR | TPS23754 |
|---|---|---|---|---|
| Package | 14-TSSOP (PW) | 14-TSSOP (PW) - same | 14-TSSOP (PW) - same | 14-TSSOP (PW) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| PoE Standard Support | IEEE 802.3at Type 1 (13 W) | IEEE 802.3at Type 1 (13 W) | IEEE 802.3at Type 1 (13 W) | Same family, extended class/power support |
Key Differentiators
- Enhanced ESD ride-through capability (vs TPS23753)
- Cost-optimized single-chip PoE PD + PWM solution (vs TPS23753)
- Dual-source power flexibility (vs TPS23754)
Design Notes
The 13-W type 1 PD allocation is measured at the PD input per IEEE 802.3at, not at your output. Estimated: with a typical isolated flyback efficiency of 85-90%, plan for roughly 10-12 W of usable output power. Size the transformer and output rectifier accordingly, and verify that classification advertises the correct class so the PSE allocates adequate power. Do not design to the full 13 W at the output or the PD will violate the standard under peak load.
Transformer availability is a frequent program risk with this device: the HA3801-BL used on the TPS23753AEVM-004 reference design has experienced stock shortages, per TI E2E forum reports. Qualified alternatives discussed on the TI E2E forum include Pulse Electronics PA0691NL, Wurth Electronics 750311806, and Coilcraft C1173-AL - but any substitute must be re-verified for turns ratio, inductance, and isolation rating against your flyback design equations before release.
Keep the hotswap MOSFET loop (VDDB, hotswap node, transformer primary) and the gate-drive loop tight to minimize ringing on the 100-V-rated switch node. Place the current-sense and RC timing components close to the IC per the datasheet layout guidance, and use the TPS23753AEVM-004 layout as a starting point - TI's EVM layout has been validated for ESD ride-through, which is sensitive to front-end placement and grounding.
Compliance Information
Compliance data not present in the provided web data; verify RoHS/REACH status on the TI product page (https://www.ti.com/product/TPS23753A) before procurement. PoE interface compliance is per IEEE 802.3at per the datasheet.
