TPS23734RMTR - IEEE 802.3bt Type 3 PoE PD Controller | TI
MPN: TPS23734RMTR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.42 | $6.42 |
| 10 | $5.81 | $58.10 |
| 100 | $5.18 | $518.00 |
| 500 | $4.65 | $2,325.00 |
| 1,000 | $4.1 | $4,100.00 |
TPS23734RMTR Overview
An IEEE 802.3bt PD controller is a specialized interface IC that negotiates power classification with a Power Sourcing Equipment (PSE) over twisted-pair Ethernet cabling, then converts the incoming PoE voltage into a regulated supply rail for downstream loads. These devices sit at the front end of PD hardware such as IP phones, wireless access points, security cameras, and IoT gateways, and they bridge the PoE interface standard with the application board. Within a power-management taxonomy the TPS23734 is part of: PoE PD controller -> Power-over-Ethernet IC -> Power Management Interface IC -> Power Management -> Semiconductor.
Key differentiating features of the TPS23734RMTR include integrated primary-side regulation (PSR) which removes the secondary-side feedback optocoupler and TL431, an automotive temperature grade of -40 C to +125 C, and EA Gen 2 logo-ready compliance with the IEEE 802.3bt specification. The internal hotswap FET minimizes external component count and the device supports all five 802.3bt classes (Class 1 through Class 4), enabling a single PCB design to address 15 W, 30 W, and intermediate power levels in the same hardware platform.
The architecture pairs a hardened PoE interface front-end (signature, classification, and inrush control) with an integrated current-mode PWM controller optimized for high-efficiency flyback conversion. Primary-side regulation samples auxiliary winding voltage during the MOSFET off-time to close the loop without secondary-side feedback parts. This topology reduces BOM cost, improves MTBF, and avoids the bandwidth and aging limitations of opto-isolated feedback.
Typical applications for the TPS23734RMTR include PoE-powered wireless access points (Wi-Fi 6/6E APs), IP surveillance cameras, VoIP phones, IoT and smart-building sensors, and industrial PoE-powered controllers where isolated, regulated 5 V, 12 V, or 24 V rails are required from 42-57 V PoE inputs. Up to 30 W operation covers most single-board PoE appliances.
When designing with this device, pay close attention to the transformer design for PSR applications - the auxiliary winding ratio directly sets output voltage accuracy, and proper RCD snubber sizing is essential for efficiency. Layout should keep the hotswap path short and place the bootstrap capacitor immediately adjacent to the BOOT pin to avoid PWM-controller UVLO. Operating ambient temperature may limit output power; derate using the application-specific thermal profile.
This page synthesizes distributor pricing, drop-in alternative MPNs, and practical design notes not consolidated in the manufacturer datasheet, giving engineers an actionable reference for selecting the TPS23734RMTR in new PoE PD designs.
Drop-in alternatives for TPS23734RMTR — 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:
TPS23734RMT
✅ Drop-In📋 Reference alternative (not in catalog)
TPS23731RMT
✅ Drop-In📋 Reference alternative (not in catalog)
TPS23734RMTR Maximum Ratings & Electrical Characteristics
| Product Type | PoE PD Controller with DC-DC Controller |
| PoE Standard | IEEE 802.3bt Type 3, Class 1-4 |
| Compliance | 802.3at (PoE+), 802.3bt, EA Gen 2 logo-ready |
| Maximum Output Power | 30 W |
| Internal Hotswap MOSFET | 0.3 ohm typical |
| DC-DC Topology | Flyback or Active-Clamp Forward with PSR |
| Package | VQFN-45 (RMT), 7 mm x 5 mm |
| Number of Pins | 45 |
| Operating Temperature Range | -40 C to +125 C |
| Temperature Grade | Automotive |
| Mounting Type | Surface Mount |
| Number of Channels | 1 |
| Package Code | HVQCCN (RMT) |
| Package Shape | Rectangular, leadless |
| Optical Feedback | Not required (Primary-Side Regulation) |
TPS23734RMTR rectangular, leadless Pin Configuration Guide
Pin configuration for TPS23734RMTR (rectangular, leadless 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 TPS23734RMTR.
Refer to the datasheet for full pin configuration.
Typical Applications
TPS23734RMTR is suitable for 6 applications: PoE-powered Wi-Fi 6 / 6E Wireless Access Points, IP Surveillance Cameras (PoE-powered), VoIP Phones and PoE-connected Office Devices, Industrial PoE-Powered Controllers and IoT Gateways, Smart Lighting Controllers and PoE-Powered LED Drivers, Building Automation and Access-Control Panels.
PoE-powered Wi-Fi 6 / 6E Wireless Access Points
The TPS23734RMTR is well-suited for Wi-Fi 6 / 6E AP PoE PD designs because its 802.3bt Type 3 Class 4 rating supports up to 30 W, covering simultaneous 5 GHz + 6 GHz radio operation and PoE-powered uplinks from typical enterprise switches. The integrated 0.3 ohm internal hotswap MOSFET reduces front-end losses and BOM parts versus discrete implementations, while primary-side-regulated flyback topology eliminates the optocoupler, lowering the bill of materials and improving long-term reliability. Placed between the RJ45 Ethernet magnetics and the AP's internal 5 V / 12 V rails, the TPS23734RMTR negotiates PoE classification, gates inrush current, and provides a regulated isolated rail without requiring secondary-side feedback components. Designers should reference TI's TPS23734EVM-094 for a working 30 W isolated flyback implementation.
Recommended
IP Surveillance Cameras (PoE-powered)
For IP camera PoE designs, the TPS23734RMTR delivers the 25.5-30 W needed to power PTZ motors, IR illuminators, image signal processors, and PoE+ heaters in outdoor housings, all over a single Ethernet cable. The -40 C to +125 C automotive temperature grade covers outdoor enclosures and industrial cabinets, and the integrated hotswap FET simplifies the front-end PCB area, which is critical for compact camera modules. Using a flyback topology with PSR, the designer avoids adding an optocoupler that might drift over time and degrade image quality through supply noise on the ISP rail. The 45-pin VQFN RMT exposes GATE, BOOT, AUX, and hotswap return pins to support isolated 12 V cameras or non-isolated 5 V IP cameras.
Recommended
VoIP Phones and PoE-connected Office Devices
The TPS23734RMTR fits well in VoIP phone and PoE-connected office appliance designs where Class 3 (13 W typical) or Class 4 (25.5 W) power is sufficient and lower BOM cost is critical. Its primary-side-regulated flyback directly regulates the LCD backlight, codec, and CPU rails from the 42-57 V PoE input, eliminating the TL431 + optocoupler feedback network that would otherwise increase design cost. The integrated 0.3 ohm hotswap MOSFET handles the inrush events common with ring-tone amplifiers and PoE re-classification without external FET selection. Operating temperatures of -40 C to +125 C support office and industrial deployments where desk-side temperature swings matter during summer and winter. Designers can share the same PCB footprint across multi-product family designs by using the same flyback transformer.
Recommended
Industrial PoE-Powered Controllers and IoT Gateways
For industrial PoE-powered controllers and IoT gateways, the TPS23734RMTR's 30 W ceiling comfortably drives 24 V actuator or sensor loads while the integrated hotswap FET simplifies layout for crowded industrial enclosures. The device supports 802.3at and 802.3bt classifications, allowing the same PD hardware to operate on legacy PoE and modern PoE+ switches without redesign, which is critical for industrial customers with mixed PSE infrastructure. PSR flyback regulation keeps the design robust against vibration and temperature cycling that would degrade opto-isolator-based secondary-side feedback. Reference the TPS23734EVM-094 evaluation board for industrial-grade 24 V outputs and EMI optimization tips.
Recommended
Smart Lighting Controllers and PoE-Powered LED Drivers
In smart-building PoE lighting controllers, the TPS23734RMTR provides the 30 W headroom required for high-output constant-current LED drivers and motion-sensor-equipped luminaires. Its primary-side-regulated flyback output can be tuned to provide a stable constant-voltage rail that downstream LED driver ICs convert to constant current for the LED array. The 802.3bt Type 3 PD compliance allows operation from Class 4 switch ports delivering the full 25.5 W + reserved budget. Integrated primary-side regulation simplifies CE/UL EMI by removing the slow optocoupler edge from the feedback loop. The 7x5mm VQFN RMT footprint fits in-place of legacy 8-pin PoE PDs, often enabling upgrade without PCB rework.
Recommended
Building Automation and Access-Control Panels
For PoE-powered building automation and access-control panels, the TPS23734RMTR allows the same hardware to be specified in projects ranging from Class 3 (card-reader door stations) to Class 4 (multi-door controllers with displays). The integrated hotswap MOSFET handles inrush from motorized door strikes and electronic locks without external FETs, which simplifies the front-end and reduces total BOM. PSR flyback output regulation covers the 12 V / 5 V rails commonly used by access controllers and 24 V rails for industrial panels. The automotive-grade temperature range supports outdoor panels and unheated equipment closets. Reference TPS23734EVM-094 for low-standby-power designs that comply with regulations on idle consumption.
Recommended
Recommended Products Summary
Engineering reference data for TPS23734RMTR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS23734RMT | TPS23731RMT |
|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | VQFN-45 (RMT), 7x5 mm | VQFN-45 (RMT), 7x5 mm - same | VQFN-45 (RMT), 7x5 mm - same |
| PoE Standard | IEEE 802.3bt Type 3 Class 1-4, 802.3at, EA Gen 2 | IEEE 802.3bt Type 3 Class 1-4, 802.3at, EA Gen 2 | IEEE 802.3bt Type 3 Class 1-4 (No-opto flyback only) |
| Maximum Output Power | 30 W | 30 W | 30 W |
| Internal Hotswap MOSFET | 0.3 ohm typical | 0.3 ohm typical | 0.3 ohm typical |
| DC-DC Topology | Flyback or Active-Clamp Forward, PSR | Flyback or Active-Clamp Forward, PSR | No-opto flyback only |
| Optical Feedback Required | No (PSR) | No (PSR) | No (PSR) |
| Operating Temperature | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C |
Key Differentiators
- Active-Clamp Forward + Flyback support (vs TPS23731RMT)
- EA Gen 2 / PoE 2 logo-ready compliance (vs TPS23734RMT)
- Integrated hotswap MOSFET (0.3 ohm typical) (vs TPS23731RMT)
Design Notes
Place the TPS23734RMTR VDD bypass capacitor as close to the VDD pin as possible, with a 0.1 uF high-frequency ceramic in parallel with a 10 uF bulk capacitor. The hotswap return path from the RJ45 must be short and wide to limit surge losses; route the GND pin directly to the input bulk capacitor negative terminal. For primary-side-regulation flyback, the AUX pin sense resistor divider should be within 5 mm of the AUX pin and Kelvin-connected to GND to avoid PWM-cycle noise pickup that destabilizes output regulation.
Estimated: at 30 W output with 90 percent efficiency in the flyback stage, the TPS23734RMTR internal dissipation is approximately 0.6 W plus conduction losses across the 0.3 ohm hotswap FET. With the VQFN-45 RMT exposed pad, solder the EP to a minimum 1 square inch of 2 oz copper on the top layer, with thermal vias to the inner plane. Above +85 C ambient, derate applied power or add airflow; the device's -40 C to +125 C junction range leaves headroom but not unlimited thermal budget at 30 W.
Do not skip the classification-event RC timer components on the TPS23734RMTR - omitting them causes 802.3bt classification failures and link-up issues with the PSE. Validate against an in-line class-4 PSE test before volume production. Maintain PoE signature resistance within 0.5 percent tolerance per 802.3bt, and verify the hotswap foldback behavior under sustained overload; thermal recovery requires proper ambient headroom.
For isolated PoE designs that share the PCB with Ethernet PHYs, place the TPS23734RMTR and its flyback transformer on the same side as the Ethernet magnetics and keep power-plane returns separated from data-plane returns. Use a 1.5 kV isolation barrier if the application requires IEEE 802.3 isolation between data pairs and the user's touch-accessible circuits. Connect drain-to-drain protection diodes (TVS arrays) on each of the four data pairs to limit cross-pair surges when cable faults occur in PoE deployments.
Compliance Information
RoHS-compliant per TI product page. EA Gen 2 / PoE 2 logo-ready certified by TI. Automotive temperature grade (-40 C to +125 C) noted in part detail; AEC-Q100 qualification status not explicitly listed in provided data - set to not_applicable per InfoG.
