Texas Instruments TPS23730RMTR

Overview

TPS23730 from Texas Instruments is an IEEE 802.3bt Type 3 PoE powered device (PD) interface with integrated current-mode DC-DC controller for flyback and active clamp forward topologies. It delivers up to 60 W input power, features a 0.3-Ω (typ) hotswap MOSFET, supports primary-side regulation (PSR), and operates across –40°C to 125°C junction temperature. It is used in PoE-powered security cameras requiring robust MPS, low-noise power conversion, and dual-power feed support.

For engineers reviewing the TPS23730 datasheet, TPS23730 pinout, TPS23730 application, or TPS23730 equivalent, key selection criteria include IEEE 802.3bt Class 1–6 compliance, PSR-enabled flyback efficiency, automatic MPS behavior under auxiliary power detection, soft-stop shutdown for FET stress reduction, and VQFN-45 package thermal performance with dual thermal pads.

Technical Context

The TPS23730 integrates two tightly coupled subsystems: a PoE PD interface compliant with IEEE 802.3bt Type 3 (up to 51 W at PD input, scalable to 60 W with margin), and a current-mode DC-DC controller supporting both flyback (with PSR or optocoupler feedback) and active clamp forward configurations. Its PoE section includes programmable classification (CLSA/CLSB), allocated power indication (TPH/TPL), and auto-stretching Maintain Power Signature (MPS).

The DC-DC controller operates at 223–273 kHz (typ 250 kHz), supports CCM operation, provides ±1.5% load regulation at 5 V output with synchronous rectification, and includes slope compensation, blanking, soft-start/soft-stop, frequency dithering (SSFD), and dead-time control (DT). It uses dual thermal pads (PAD_G to RTN, PAD_S to VSS) for enhanced thermal dissipation in high-power PoE applications.

Key Specifications

Pinout & Package

VQFN-45 package (7.00 mm × 5.00 mm) with exposed thermal pads: PAD_G connected to RTN (DC-DC ground reference), PAD_S connected to VSS (PoE return). Dual-pad construction separates PoE and DC-DC thermal paths for optimized board-level heat management.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PoE PD controller applications.

Compared with TPS23731 and TPS23734, the TPS23730 uniquely combines full IEEE 802.3bt Type 3 (Class 1–6) support, ACF topology capability, dual-power feed priority (APD/PPD), and flexible TPH/TPL reporting-making it the only option for 60-W, field-upgradeable, multi-source PoE endpoints.

Availability

TPS23730 is available at Aetrix Electronics and suitable for video surveillance, enterprise Wi-Fi infrastructure, and industrial IoT edge nodes requiring stable component supply, long-term lifecycle assurance, and design-in support for IEEE 802.3bt-compliant systems.

Supply support for TPS23730 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, embedded processing, and power management technologies, with decades of leadership in PoE innovation and industrial-grade IC design.

The TPS23730 belongs to TI's PoE PD controller product line, engineered specifically for high-efficiency, thermally robust, and standards-compliant powered devices in demanding 60-W applications such as security cameras and wireless infrastructure.

FAQ

What is the maximum input power supported by the TPS23730?

The TPS23730 supports IEEE 802.3bt Type 3 operation with up to 51 W delivered at the PD input, and is designed for system-level operation up to 60 W. Its 0.3-Ω (typ) hotswap MOSFET, robust thermal design (R_{θJC(bot_POE)} = 3.9°C/W), and 100-V absolute max rating enable reliable 60-W handling when paired with appropriate magnetics and PCB layout.

Does the TPS23730 support primary-side regulation (PSR) in flyback designs?

Yes, the TPS23730 fully supports PSR in flyback configurations using its dedicated PSRS, CP, FB, and COMP pins. The PSR loop eliminates the need for an optocoupler and TLV431 shunt regulator-reducing bill-of-materials cost, improving reliability, and simplifying safety isolation certification for the TPS23730-based design.

How does the TPS23730 handle auxiliary power adapter integration?

The TPS23730 uses APD and PPD inputs to manage auxiliary power priority: raising APD above 1.5 V disables the PoE hotswap FET and turns off classification, while asserting PPD above 2.5 V enables the FET and activates TPH/TPL. This allows seamless switchover between PoE and local adapter without firmware intervention-critical for redundant power feeds in the TPS23730 application.

What is the purpose of the dual thermal pads (PAD_G and PAD_S) on the TPS23730 VQFN package?

PAD_G connects to RTN and serves the DC-DC controller's thermal path, while PAD_S connects to VSS and serves the PoE hotswap circuit. This separation enables independent thermal management: R_{θJC(bot_DCDC)} = 9.1°C/W and R_{θJC(bot_POE)} = 3.9°C/W. In practice, this allows the TPS23730 to sustain 60-W operation without thermal throttling when both pads are properly soldered to large copper areas.

Can the TPS23730 be used in active clamp forward (ACF) topologies?

Yes, the TPS23730 explicitly supports ACF configurations via its GAT2 gate driver output, DT pin for dead-time control, and current-sense (CS) and COMP interfaces. Unlike the TPS23731, the TPS23730 includes full ACF enablement-making it suitable for high-efficiency, high-density 60-W PoE power supplies where ACF outperforms flyback in efficiency and EMI performance.