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Texas Instruments TPS23754PWP-1
- Part No.:
- TPS23754PWP-1
- Manufacturer:
- Texas Instruments
- Category:
- Power Over Ethernet (PoE) Controllers
- Package:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS23754PWP-1.pdf
- Description:
- IC POE CNTRL 1 CHANNEL 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:6,749
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Product details
Overview
TPS23754PWP-1 from Texas Instruments is an IEEE 802.3at Type 2 Powered Device (PD) interface and current-mode DC-DC controller 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 gate drivers with programmable dead time, and operates across –40°C to 125°C. It enables PoE-powered security cameras and VoIP phones with adapter ORing support.
For engineers reviewing the TPS23754PWP-1 datasheet, TPS23754PWP-1 pinout, TPS23754PWP-1 application, or TPS23754PWP-1 equivalent, this page delivers verified specifications including VC UVLO (15 V), switching frequency range (50–937 kHz), GATE/GAT2 drive capability (0.6 A source/1.0 A sink), thermal shutdown (145°C), and IEEE 802.3at classification compliance - all confirmed from TI's SLVS885I production datasheet.
Technical Context
The TPS23754PWP-1 implements a combined PoE PD interface and current-mode DC-DC controller. Its PoE section performs IEEE 802.3at-compliant detection (64.3 μA typical DEN current), extended hardware classification (programmable via CLS resistor), and Type 2 PSE status indication via T2P output. The DC-DC controller uses internal slope compensation (155 mV typical), programmable blanking (via BLNK resistor), and soft-start (3.9 ms typical).
It supports dual-MOSFET topologies with complementary GATE and GAT2 outputs, configurable dead time (40–188 ns via DT resistor), and adaptive converter start-up (VC UVLO at 15 V). Input voltage ORing logic allows selection between PoE, external adapter (VDD1), or highest-voltage source - critical for field-deployed IP devices requiring redundant power paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IEEE Standard Support | Complies with IEEE 802.3at Type 2 for up to 30-W powered devices; includes extended hardware classification and T2P status flag. |
| VC UVLO Threshold | 15 V (±0.7 V) rising edge; ensures reliable converter start-up only after sufficient PoE rail stabilization. |
| Switching Frequency Range | 50–937 kHz (programmable via FRS resistor); enables optimization for efficiency, EMI, and transformer size. |
| GATE / GAT2 Drive | 0.6 A source / 1.0 A sink (pulsed); supports fast turn-on/off of external power MOSFETs in isolated topologies. |
| Hotswap MOSFET RDS(on) | 0.43 Ω typical; limits conduction loss and thermal rise under 825 mA continuous RTN current. |
| Thermal Shutdown | 145°C turn-off with 20°C hysteresis; protects against sustained overload or poor heatsinking in enclosed enclosures. |
| Operating Temperature | –40°C to 125°C junction; validated for industrial and outdoor IP camera deployments without derating. |
Pinout & Package
TPS23754PWP-1 is housed in a 20-pin HTSSOP (PWP) package with 6.50 mm × 4.40 mm body size and exposed thermal pad (PAD = VSS). The PowerPAD™ construction enhances thermal performance for high-power PoE applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| APD | Adapter Preference Disable | Raising APD–ARTN >1.5 V disables hotswap switch and forces external adapter (VDD1–RTN) power path; used for ORing control. |
| BLNK | Current-Sense Blanking Control | Resistor from BLNK to ARTN programs blanking period (35–78 ns); prevents false current-limit triggering during MOSFET turn-on spike. |
| CLS | Classification Current Programming | Resistor from CLS to VSS sets IEEE 802.3at class current (e.g., 1270 Ω → 2.1 mA for Class 4). |
| CTL | PWM Control Loop Input | Feedback node for optocoupler-based output regulation; 1.5 V threshold disables PWM when pulled low. |
| DEN | PoE Detection Signature | 24.9-kΩ pull-up to VDD generates 64.3 μA detection current per IEEE 802.3af/at requirements. |
| GATE / GAT2 | Gate Drive Outputs | Complementary drivers for primary and secondary MOSFETs; dead time set by DT resistor (40–188 ns). |
| T2P | Type 2 PSE Indicator | Active-low open-drain output signaling successful IEEE 802.3at Type 2 hardware classification. |
| VC | Controller Bias Supply | 15-V UVLO-regulated supply for internal circuitry; requires ≥0.47 μF ceramic capacitor to ARTN. |
| VDD / VDD1 | PoE Input / Adapter Start-Up | VDD powers PoE interface (0–57 V); VDD1 sources converter start-up current and enables adapter ORing. |
| VSS / PAD | Power Ground / Thermal Pad | VSS is common return; exposed PAD must be soldered to PCB ground plane for thermal and electrical integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Dual Gate Drivers with Programmable Dead Time | Enables robust active-clamp forward or synchronous flyback designs; DT resistor adjusts timing to prevent shoot-through. |
| IEEE 802.3at Extended Classification | Supports Type 2 PSE handshake with hardware flag (T2P) and programmable class current - essential for >25.5 W PDs. |
| Adapter ORing Logic | Hardware-selectable priority between PoE, external adapter (VDD1), or highest-voltage source - eliminates need for external diode-OR controllers. |
| Robust 100-V Hotswap MOSFET | Integrated switch withstands Ethernet surge transients and simplifies BOM by removing discrete high-voltage FET and driver. |
| Programmable Current-Sense Blanking | BLNK resistor sets precise blanking window (35–78 ns), reducing filter complexity and improving current-loop stability. |
| Bootstrap Start-Up Source | Internal IVC current source (3.4 mA typical) charges VC capacitor from VDD1, enabling reliable start-up even at low PoE voltages (≥10.2 V). |
Applications
| Security Cameras | VoIP Telephones |
|---|---|
Use Scenario: Outdoor PTZ IP cameras requiring 24–30 W PoE power with local 12-V adapter backup. IC Role / Device Role / Timing Role: TPS23754PWP-1 acts as PoE PD interface and isolated DC-DC controller, managing power handoff between PoE and adapter while regulating 12-V/1-A output. Use Value: Eliminates external ORing diodes and discrete hotswap IC; enables seamless failover without firmware intervention or voltage droop. |
Use Scenario: Enterprise VoIP phones with PoE+ support, LED backlighting, and USB peripheral ports. IC Role / Device Role / Timing Role: TPS23754PWP-1 provides IEEE 802.3at classification, hotswap protection, and 5-V/2-A isolated flyback regulation. Use Value: Dual gate drivers reduce transformer count; programmable frequency (253 kHz typical) minimizes audible noise in office environments. |
| RFID Readers | Multiband Access Points |
Use Scenario: High-power UHF RFID readers deployed in warehouses with intermittent PoE availability. IC Role / Device Role / Timing Role: TPS23754PWP-1 manages PoE detection/classification and controls active-clamp forward converter delivering 5-V/3-A to RF front-end. Use Value: 0.43-Ω RDS(on) limits heat rise at 825 mA; thermal shutdown (145°C) prevents latch-up during reader burst transmission. |
Use Scenario: Dual-band 802.11ac access points drawing >25 W, requiring compact, thermally efficient PoE conversion. IC Role / Device Role / Timing Role: TPS23754PWP-1 serves as integrated PD interface and current-mode controller for 12-V/2.5-A isolated output. Use Value: PowerPAD™ HTSSOP package achieves 20.1°C/W junction-to-board thermal resistance - critical for fanless enclosure designs. |
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 |
|---|---|---|---|
| TPS23754PWP | Includes PPD pin for PoE enable control; TPS23754PWP-1 replaces PPD with N/C for increased pin spacing. | PPD required for systems needing explicit PoE activation control; TPS23754PWP-1 suits space-constrained layouts where PPD is unused. | Select TPS23754PWP-1 when PPD functionality is unnecessary and board layout benefits from wider pin pitch. |
| TPS23756PWP | 9-V VC UVLO (vs. 15 V); lower start-up voltage enables operation with degraded PoE links (e.g., long cable runs). | Preferred for legacy 802.3af systems or low-voltage PoE injectors; not suitable for designs relying on 15-V VC bias stability. | Choose TPS23756PWP only if PoE input voltage falls below 19 V under worst-case conditions; otherwise TPS23754PWP-1 ensures tighter regulation margin. |
Compared with TPS23754PWP and TPS23756PWP, the TPS23754PWP-1 offers optimal balance of PoE robustness (15-V UVLO), layout flexibility (N/C pin), and compatibility with standard 802.3at midspans - making it ideal for new designs targeting 25–30 W power budgets without PPD dependency.
Availability
TPS23754PWP-1 is available at Aetrix Electronics and suitable for security cameras, VoIP telephones, and RFID readers requiring stable component supply, full IEEE 802.3at compliance, and industrial temperature operation.
Supply support for TPS23754PWP-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 leader specializing in analog, embedded processing, and connectivity technologies, with over 50 years of innovation in power management and industrial ICs.
The TPS2375x product line was designed specifically for IEEE 802.3at-compliant Powered Devices, integrating PoE interface, hotswap protection, and isolated DC-DC control in a single IC to reduce system cost and board area.
FAQ
What is the VC UVLO threshold for TPS23754PWP-1, and why does it matter?
The TPS23754PWP-1 has a VC UVLO threshold of 15 V (±0.7 V) on the rising edge. This ensures the DC-DC controller remains disabled until the internal bias rail reaches sufficient voltage for stable operation - preventing erratic startup or insufficient gate drive during PoE link establishment. It directly impacts reliability in 30-W applications where marginal PoE voltage (e.g., 37 V after cable drop) must still sustain VC regulation.
How does the TPS23754PWP-1 handle power source selection between PoE and an external adapter?
The TPS23754PWP-1 implements hardware-based ORing logic using APD and PPD pins. When APD is raised above 1.5 V, it disables the hotswap MOSFET and forces power from VDD1–RTN (external adapter). Since TPS23754PWP-1 replaces PPD with N/C, adapter preference is controlled solely via APD - simplifying design for systems where PoE enable control is unnecessary.
Can TPS23754PWP-1 support IEEE 802.3at Type 2 classification, and how is it configured?
Yes, TPS23754PWP-1 fully supports IEEE 802.3at Type 2 classification via its CLS pin and T2P output. A resistor from CLS to VSS sets classification current (e.g., 1270 Ω yields 2.1 mA for Class 4), while T2P asserts low upon successful Type 2 hardware handshake - providing direct status feedback to the host microcontroller without software polling.
What is the purpose of the BLNK pin on TPS23754PWP-1, and how is it used?
The BLNK pin on TPS23754PWP-1 programs the current-sense blanking period to suppress false triggering during MOSFET turn-on spikes. Connecting a resistor from BLNK to ARTN sets blanking time (e.g., 249 kΩ → 55 ns); leaving BLNK tied to ARTN uses the internal 55-ns default. This directly affects current-loop stability and reduces need for external RC filtering on the CS pin.
Does TPS23754PWP-1 include thermal protection, and what is its trip point?
Yes, TPS23754PWP-1 includes thermal shutdown with a turn-off temperature of 145°C (typical) and 20°C hysteresis. This protects the device during sustained overload, poor PCB thermal design, or ambient temperature excursions - critical for sealed enclosures like outdoor security cameras where airflow is limited.
TPS23754PWP-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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
TPS23754PWP-1 FAQ
1.How can I place an order for TPS23754PWP-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS23754PWP-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 TPS23754PWP-1 reliable?
The price and inventory of TPS23754PWP-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS23754PWP-1 is usually 5 days.
3.What payment methods are accepted for TPS23754PWP-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS23754PWP-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS23754PWP-1?
TPS23754PWP-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS23754PWP-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 TPS23754PWP-1?
For technical support, including TPS23754PWP-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS23754PWP-1 requirements.
6.How does Aetrix verify that TPS23754PWP-1 is sourced from the original manufacturer or authorized distributors?
All TPS23754PWP-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 TPS23754PWP-1 meets industry standards.
7.What is the process for return or replacement of TPS23754PWP-1?
All TPS23754PWP-1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS23754PWP-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 TPS23754PWP-1 part is unused and in its original packaging.
Return procedure for TPS23754PWP-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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