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Texas Instruments TPS23754PWPR-1
- Part No.:
- TPS23754PWPR-1
- Manufacturer:
- Texas Instruments
- Category:
- Power Over Ethernet (PoE) Controllers
- Package:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS23754PWPR-1.pdf
- Description:
- IC POE CNTRL 1 CHANNEL 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,970
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Product details
Overview
TPS23754PWPR-1 from Texas Instruments is an IEEE 802.3at Type 2 Powered Device (PD) interface and current-mode DC-DC controller IC optimized for isolated flyback and active-clamp forward converters. It integrates a 100-V, 0.5-Ω hotswap MOSFET, supports up to 30-W input power, features dual complementary gate drivers with programmable dead time, and operates across –40°C to 125°C junction temperature. It enables PoE-powered security cameras and VoIP telephones with adapter ORing support.
For engineers reviewing the TPS23754PWPR-1 datasheet, TPS23754PWPR-1 pinout, TPS23754PWPR-1 application, or TPS23754PWPR-1 equivalent, key selection considerations include its 15-V converter start-up threshold, 227–278 kHz programmable switching frequency, 78% maximum duty cycle, dual gate drive capability, and HTSSOP-20 PowerPAD™ package with thermal performance validated per JEDEC JESD51-7.
Technical Context
The TPS23754PWPR-1 implements a complete IEEE 802.3at Type 2 PD interface with hardware classification status flag, enhanced detection signature, and programmable classification current via single resistor. Its PoE section includes 140-mA inrush limit, foldback current protection, and UVLO at 35 V with 4.55-V hysteresis.
The integrated current-mode DC-DC controller features bootstrap start-up, internal soft-start (1.9–6.2 ms), accurate current-sense blanking (35–78 ns), slope compensation (120–185 mV), and two independent gate drivers-GATE and GAT2-with programmable dead time (40–188 ns) and 0.37-A source / 1.0-A sink peak drive strength.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 0–57 V PoE input; supports midspan and endspan PSEs compliant with IEEE 802.3at |
| Converter Start-up Threshold | 15 V VCUV rising; ensures reliable startup after PoE handshaking completes |
| Switching Frequency | 227–278 kHz (RFRS = 68.1 kΩ); programmable via external resistor or synchronizable to external clock |
| Max Duty Cycle | 78%; enables high step-down ratio designs while maintaining stability in current-mode control |
| Hotswap MOSFET RDS(on) | 0.43 Ω typical; limits conduction loss and thermal rise under 825-mA continuous RTN current |
| Junction Temp Range | –40°C to 125°C; validated for industrial and outdoor IP camera deployments |
| Thermal Resistance θJA | 44.4 °C/W; enables >1 W dissipation on standard 2-layer PCB with PowerPAD™ thermal pad soldered to copper |
Pinout & Package
TPS23754PWPR-1 is housed in a 20-pin HTSSOP (PWP) package with exposed thermal pad (PowerPAD™), nominal body size 6.50 mm × 4.40 mm, and pin pitch 0.65 mm. The thermal pad must be soldered to a dedicated VSS plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CTL | PWM control loop input | Accepts optocoupler feedback voltage; 1.5-V threshold disables output at 0% duty cycle |
| GATE | Main MOSFET gate driver output | 0.6-A source / 1.0-A sink pulsed drive; interfaces directly with primary-side MOSFET in flyback topology |
| GAT2 | Secondary MOSFET gate driver output | Complementary to GATE; disabled when DT tied to VB; enables active-clamp forward topologies |
| CS | Current sense input | 0.55-V threshold with 120–185 mV slope compensation; rejects turn-on spike via BLNK-programmable blanking |
| VC | Controller bias supply | 15-V UVLO with 6.5-V hysteresis; requires ≥0.47 µF ceramic capacitor to ARTN for stable regulation |
| VDD | PoE interface supply input | Connects to PoE input rail; bypassed with 0.1 µF capacitor and TVS for surge protection |
| RTN | Hotswap MOSFET output | Delivers regulated PoE power to downstream DC-DC stage; max 825 mA continuous current |
| T2P | Type 2 classification indicator | Active-low open-drain output signaling successful IEEE 802.3at Type 2 hardware classification |
| APD | Adapter preference enable | Raising VAPD–ARTN >1.5 V disables hotswap switch and forces external adapter power path |
| CLS | Classification current programming | Resistor to VSS sets IEEE class (e.g., 1270 Ω = Class 3, 2.1 mA); 2.5 V applied during classification |
Key Features
| Feature | Design Value |
|---|---|
| Dual complementary gate drivers | Enables active-clamp forward or synchronous flyback topologies without external driver ICs |
| Programmable dead time | 40–188 ns via RDT resistor; prevents shoot-through in dual-MOSFET configurations |
| Adapter ORing support | APD/PPD pins allow deterministic priority selection between PoE and external adapter inputs |
| IEEE 802.3at Type 2 classification | Hardware-based classification with status flag (T2P) eliminates software dependency and improves boot reliability |
| Robust thermal protection | 145°C turn-off with 20°C hysteresis; combined with θJA = 44.4 °C/W for field-deployable thermal margin |
Applications
| Security Cameras | VoIP Telephones |
|---|---|
Use Scenario: Outdoor IP security camera powered over Cat5e/6 cabling with local 12-V adapter backup. IC Role / Device Role / Timing Role: TPS23754PWPR-1 acts as PoE PD interface and primary-side DC-DC controller, managing power sourcing arbitration and regulating isolated 5-V/3.3-V rails. Use Value: Enables seamless failover to adapter during PoE outage; 30-W capability supports PTZ motors and IR illuminators without external boost stages. | Use Scenario: Enterprise VoIP desk phone with Ethernet connectivity, LCD display, and USB peripheral port. IC Role / Device Role / Timing Role: TPS23754PWPR-1 provides IEEE 802.3at-compliant power acquisition and generates clean, low-noise 3.3-V system rail via flyback converter. Use Value: Dual gate drive allows optimized transformer design for EMI reduction; 78% duty cycle supports wide input range (15–57 V) without duty-cycle limiting. |
| RFID Readers | Multiband Access Points |
Use Scenario: High-power UHF RFID reader deployed in warehouse environments with centralized PoE switches. IC Role / Device Role / Timing Role: TPS23754PWPR-1 serves as the front-end PD controller and controls an active-clamp forward converter delivering 12-V to RF power amplifiers. Use Value: Programmable FRS resistor sets 250-kHz switching frequency to balance efficiency and magnetics size; 0.43-Ω RDS(on) minimizes heat in sealed enclosures. | Use Scenario: Dual-band 802.11ac access point with integrated Bluetooth and Zigbee radios, powered from PoE++ infrastructure. IC Role / Device Role / Timing Role: TPS23754PWPR-1 manages Type 2 classification handshake and drives isolated DC-DC stage powering 5-V analog RF sections and 1.2-V digital SoC rails. Use Value: BLNK-programmable blanking (35–78 ns) ensures stable current sensing despite fast-switching RF noise coupling into CS node. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PoE PD interface and DC-DC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS23756PWPR | 9-V VCUV start-up threshold vs. 15 V; identical pinout and feature set otherwise | Better suited for lower-voltage PoE systems or designs requiring earlier converter activation | Select TPS23756PWPR only if early start-up below 15 V is required; otherwise TPS23754PWPR-1 offers tighter margin against false starts |
| LT4275AIMSE#PBF | IEEE 802.3at-compliant PD interface only; requires external DC-DC controller | Offers higher integration of PSE detection/classification but no integrated gate drivers or PWM control | Choose LT4275AIMSE#PBF when using proprietary or multi-phase DC-DC topologies not supported by TPS23754PWPR-1's dual-gate architecture |
Compared with TPS23756PWPR and LT4275AIMSE#PBF, the TPS23754PWPR-1 uniquely combines full PoE PD compliance with dual-gate DC-DC control in one HTSSOP-20 package-reducing BOM count, layout area, and design validation effort for isolated 30-W PDs.
Availability
TPS23754PWPR-1 is available at Aetrix Electronics and suitable for security camera deployments, VoIP telephone manufacturing, RFID reader production, and enterprise wireless access point development requiring stable component supply and long-term industrial-grade availability.
Supply support for TPS23754PWPR-1 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 delivering analog and embedded processing solutions, with leadership in power management, signal chain, and connectivity technologies.
The TPS2375x product line was designed specifically for IEEE 802.3af/at-compliant Powered Devices requiring integrated PoE interface and isolated DC-DC control-targeting IP surveillance, unified communications, and industrial IoT endpoints.
FAQ
What is the key functional difference between TPS23754PWPR-1 and TPS23754PWPR?
The TPS23754PWPR-1 replaces the PPD (Power Present Detect) pin with a no-connect (N/C) to increase pin spacing and reduce risk of solder bridging in high-density layouts. All other electrical characteristics, pin functions, and thermal performance of the TPS23754PWPR-1 match the base TPS23754PWPR device, including its 15-V VCUV start-up threshold and dual gate driver operation.
Does TPS23754PWPR-1 support IEEE 802.3bt (PoE++)?
No, the TPS23754PWPR-1 supports IEEE 802.3at (PoE+) only, delivering up to 30 W of input power. It implements Type 2 hardware classification but lacks the four-pair detection, autoclass, and higher power-handling features required for 802.3bt. For PoE++ designs, TI recommends the TPS23721 or TPS23731 family instead of the TPS23754PWPR-1.
Can TPS23754PWPR-1 drive synchronous rectifiers in secondary-side regulation?
No, the TPS23754PWPR-1 does not provide secondary-side gate drive signals or sensing for synchronous rectification. Its GATE and GAT2 outputs are primary-side, high-side drivers intended for active-clamp forward or flyback primary switches. Secondary-side synchronous rectifier control requires external circuitry or a dedicated controller such as the UCC24612, not integrated into the TPS23754PWPR-1.
What is the minimum recommended capacitance on the VC pin for TPS23754PWPR-1?
The TPS23754PWPR-1 requires a minimum 0.47 µF ceramic capacitor connected directly between VC and ARTN. This capacitor stabilizes the internal bias regulator and supports bootstrap start-up. Using less than 0.47 µF risks erratic startup behavior or failure to sustain regulation under load transients-verified in TI's SLVS885I datasheet Section 6.5.
How does the BLNK pin affect current-sense timing in TPS23754PWPR-1?
The BLNK pin in the TPS23754PWPR-1 sets the blanking interval between GATE turn-on and activation of the CS comparator, preventing false triggering from MOSFET turn-on spikes. When tied to ARTN, it enables a fixed ~55 ns blanking period; connecting a resistor (e.g., 249 kΩ) allows precise tuning from 35–78 ns-critical for stable current-mode control in high-frequency, high-dV/dt flyback designs.
TPS23754PWPR-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Controller (PD), DC/DC
- Number of Channels:
- 1
- Power - Max:
- 30 W
- Internal Switch(s):
- Both
- Auxiliary Sense:
- No
- Standards:
- 802.3at (PoE+), 802.3af (PoE)
- Voltage - Supply:
- 0V ~ 57V
- Current - Supply:
- 920µA
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-HTSSOP
TPS23754PWPR-1 FAQ
1.How can I place an order for TPS23754PWPR-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS23754PWPR-1 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 TPS23754PWPR-1 reliable?
The price and inventory of TPS23754PWPR-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS23754PWPR-1 is usually 5 days.
3.What payment methods are accepted for TPS23754PWPR-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS23754PWPR-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS23754PWPR-1?
TPS23754PWPR-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS23754PWPR-1 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 TPS23754PWPR-1?
For technical support, including TPS23754PWPR-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS23754PWPR-1 requirements.
6.How does Aetrix verify that TPS23754PWPR-1 is sourced from the original manufacturer or authorized distributors?
All TPS23754PWPR-1 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 TPS23754PWPR-1 meets industry standards.
7.What is the process for return or replacement of TPS23754PWPR-1?
All TPS23754PWPR-1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS23754PWPR-1, 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 TPS23754PWPR-1 part is unused and in its original packaging.
Return procedure for TPS23754PWPR-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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