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Texas Instruments TPS23758RJJR
- Part No.:
- TPS23758RJJR
- Manufacturer:
- Texas Instruments
- Category:
- Power Over Ethernet (PoE) Controllers
- Package:
- 24-VFDFN Exposed Pad, 23 Leads
- Datasheet:
-
TPS23758RJJR.pdf
- Description:
- IC POE CNTRL 1 CHANNEL 24VSON
- Quantity:
- Payment:
- Shipping:
Inventory:17,812
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Product details
Overview
TPS23758RJJR from Texas Instruments is an IEEE 802.3at Type-1 PoE powered device (PD) interface IC with integrated 150-V, 0.77-Ω switching MOSFET and current-mode flyback DC-DC controller. It delivers ±1% load regulation at 5 V, supports primary-side regulation (PSR), operates up to 273 kHz, and features robust 100-V hotswap FET with 0.36-Ω on-resistance - enabling compact, high-efficiency VoIP phones and security cameras.
For engineers reviewing the TPS23758RJJR datasheet, TPS23758RJJR pinout, TPS23758RJJR application, or TPS23758RJJR equivalent, this page provides verified technical context, validated pin functions, confirmed PSR-based flyback operation with synchronous rectification support, real-world EMI reduction via frequency dithering and slew control, and precise thermal shutdown behavior at 159°C.
Technical Context
The TPS23758RJJR integrates PoE PD interface logic, a 150-V internal power switch, and a current-mode flyback controller optimized for continuous conduction mode (CCM) with secondary-side synchronous rectification. Its PSR architecture eliminates optocouplers by using auxiliary winding feedback, and it supports multi-output regulation (e.g., 5 V and 3.3 V) with ±1% accuracy across 0–100% load.
It implements spread-spectrum frequency dithering (DTHR-controlled), adjustable soft-start (SST), slope compensation, and blanking for stable current-mode control. The APD pin enables priority selection between PoE and external adapter input, while robust protection includes overtemperature shutdown (159°C), foldback current limiting, and inrush control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IEEE Standard Compliance | IEEE 802.3at Type-1 PD (13 W max), EA logo certified |
| Switching FET | Integrated 150-V, 0.77-Ω (typ) MOSFET; enables self-contained flyback primary switch |
| Hotswap FET | 100-V, 0.36-Ω (typ) internal pass device; handles PoE inrush and classification |
| Regulation Accuracy | ±1% (typ) load regulation at 5 V output with sync FET; ensures stable rail under full load range |
| Switching Frequency | 223–273 kHz (adjustable via FRS resistor); supports compact magnetics and EMI filtering |
| Operating Temperature | –40°C to +125°C junction; validated for industrial and outdoor IP camera deployments |
| Package | VSON-24 (6.0 mm × 4.0 mm); thermally enhanced for high-power density PoE PD designs |
Pinout & Package
VSON-24 package with 6.0 mm × 4.0 mm body size and exposed thermal pad connected to VSS. Designed for surface-mount assembly with anchors (A1–A4) soldered for mechanical reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RSNS | Current sense source node | Connects to external sense resistor; sets peak current limit for DC-DC converter |
| DRAIN | Internal MOSFET drain | Primary-side switching node for flyback transformer; rated 150 V, 2 A peak |
| FB | Primary-side regulation feedback | Accepts voltage from auxiliary winding; enables optocoupler-free PSR control loop |
| APD | Auxiliary power detect input | Raised >1.5 V above RTN disables PoE hotswap; allows seamless adapter priority handover |
| FRS | Frequency set resistor input | Tie resistor to RTN to program switching frequency from ~220 kHz to ~270 kHz |
| SST | Soft-start timing capacitor | Capacitor to RTN sets startup ramp rate and hiccup timer; prevents output overshoot |
| COMP | Error amplifier output | Drives compensation network to FB; sources/sinks up to 6 mA for loop stability |
| RTN | PoE return and controller reference | Common return for hotswap circuit and DC-DC controller; not tied to system ground |
Key Features
| Feature | Design Value |
|---|---|
| Primary-side regulation (PSR) | Eliminates optocoupler and shunt regulator; reduces BOM cost and board area in isolated flyback designs |
| Spread-spectrum frequency dithering | Reduces EMI peak amplitude via DTHR-controlled ramp; minimizes filter component size and cost |
| Adjustable slew rate control | SRR/SRF pins enable independent tuning of VDS rise/fall times; improves EMI without sacrificing efficiency |
| Advanced startup with minimal bias cap | VCC startup voltage 11–15.5 V; allows use of small 3.3-µF ceramic capacitor instead of large electrolytic |
| Multi-topology support | Flyback (PSR) and non-isolated buck modes supported; single IC serves multiple power architecture needs |
Applications
| VoIP Phones | Security Cameras |
|---|---|
Use Scenario: Powered via Ethernet cable in enterprise office environments with centralized PoE switches. IC Role / Device Role / Timing Role: Full PoE PD interface + flyback DC-DC controller; regulates 5 V/3.3 V rails for codec, processor, and image sensor. Use Value: Enables single-cable deployment without local AC adapter; ±1% regulation maintains audio clarity and DSP performance across load transients. | Use Scenario: Outdoor PTZ or dome cameras requiring reliable power and thermal resilience. IC Role / Device Role / Timing Role: IEEE 802.3at-compliant PD with integrated hotswap and PSR flyback; manages 13-W input for imaging and IR illumination. Use Value: –40°C to +125°C operation ensures uptime in uncontrolled enclosures; 159°C thermal shutdown prevents field failures. |
| IP Phones | Wireless Access Points |
Use Scenario: Desktop IP phones drawing power from midspan or endspan PoE switches. IC Role / Device Role / Timing Role: Type-1 PD controller with classification (Class 0–3), inrush limiting, and synchronous flyback regulation. Use Value: Robust 0.36-Ω hotswap FET sustains repeated plug/unplug cycles; PSR simplifies layout vs. opto-based solutions. | Use Scenario: Dual-band 802.11ac access points deployed in ceilings with limited airflow. IC Role / Device Role / Timing Role: Integrated PoE PD + DC-DC controller delivering regulated 5 V and 3.3 V to RF and baseband ICs. Use Value: VSON-24 package and thermal pad (RθJB = 14.5°C/W) enable high power density without heatsinks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PoE PD controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS23753ARJBR | Lacks integrated 150-V switching FET; requires external primary-side MOSFET; supports only 802.3af (Type 1, 15.4 W PSE side) | Lower power budget (≤12.95 W at PD); no PSR - requires optocoupler and TL431 | Choose when legacy 802.3af compliance suffices and external FET layout is acceptable |
| LT4275AIMSE#PBF | Standalone IEEE 802.3at PD interface only; no DC-DC controller or power switch; requires external flyback controller | Requires full external power stage; supports higher classes (up to Class 8) and dual-signature detection | Choose when modular design, higher power (≥25.5 W), or dual-class flexibility is required |
Compared with TPS23753ARJBR and LT4275AIMSE#PBF, the TPS23758RJJR uniquely integrates PoE interface, hotswap FET, and PSR flyback controller in one VSON-24 package - reducing component count by ≥12 parts and eliminating optocoupler-related layout complexity.
Availability
TPS23758RJJR is available at Aetrix Electronics and suitable for VoIP phones, security cameras, IP phones, and wireless access points requiring stable component supply, long-term lifecycle assurance, and production-ready PoE PD integration.
Supply support for TPS23758RJJR 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 Power over Ethernet solutions.
The TPS23758RJJR belongs to TI's PoE PD controller product line, designed specifically for compact, high-efficiency IEEE 802.3at Type-1 powered devices that require integrated power conversion and robust thermal/EMI performance.
FAQ
What is the maximum PoE input power supported by the TPS23758RJJR?
The TPS23758RJJR is an IEEE 802.3at Type-1 powered device controller supporting up to 13 W delivered to the PD. It complies with EA logo certification requirements and uses hardware classification (Class 0–3) to negotiate power with the PSE. Input voltage range is 34.7–57 V, with undervoltage lockout hysteresis of 4.5 V.
Does the TPS23758RJJR require an optocoupler for output voltage regulation?
No, the TPS23758RJJR does not require an optocoupler. It implements primary-side regulation (PSR) using feedback from the transformer's auxiliary winding connected to the FB pin. This eliminates the need for secondary-side shunt regulators and optocouplers, reducing cost and board space in isolated flyback designs.
How is the switching frequency set on the TPS23758RJJR?
The switching frequency of the TPS23758RJJR is set by connecting a resistor from the FRS pin to RTN. Typical values range from 223 kHz to 273 kHz depending on resistor value (e.g., 60.4 kΩ yields ~248 kHz). The FRS pin also accepts synchronization pulses with 35 ns minimum pulse width for external clock alignment.
What thermal protection features does the TPS23758RJJR include?
The TPS23758RJJR includes thermal shutdown at 159°C (typical turnoff temperature) with 13°C hysteresis. It also features current-limit foldback and inrush current limiting during startup. The VSON-24 package has RθJB = 14.5°C/W, enabling efficient heat transfer to the PCB for sustained operation in enclosed environments.
Can the TPS23758RJJR operate with an external AC/DC adapter in parallel with PoE?
Yes, the TPS23758RJJR supports adapter priority via the APD pin. When APD is raised >1.5 V above RTN, the internal hotswap MOSFET disables, allowing the external adapter to power the system. This enables seamless fallback or primary power selection without manual switching or external OR-ing circuits.
TPS23758RJJR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-VFDFN Exposed Pad, 23 Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Controller (PD), DC/DC
- Number of Channels:
- 1
- Power - Max:
- 12.95 W
- Internal Switch(s):
- Yes
- Auxiliary Sense:
- Yes
- Standards:
- 802.3at (PoE)
- Voltage - Supply:
- 0V ~ 57V
- Current - Supply:
- 2.35mA
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-VSON (6x4)
TPS23758RJJR FAQ
1.How can I place an order for TPS23758RJJR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS23758RJJR 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 TPS23758RJJR reliable?
The price and inventory of TPS23758RJJR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS23758RJJR is usually 5 days.
3.What payment methods are accepted for TPS23758RJJR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS23758RJJR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS23758RJJR?
TPS23758RJJR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS23758RJJR 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 TPS23758RJJR?
For technical support, including TPS23758RJJR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS23758RJJR requirements.
6.How does Aetrix verify that TPS23758RJJR is sourced from the original manufacturer or authorized distributors?
All TPS23758RJJR 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 TPS23758RJJR meets industry standards.
7.What is the process for return or replacement of TPS23758RJJR?
All TPS23758RJJR units undergo pre-shipment inspection (PSI). If there is an issue with TPS23758RJJR, 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 TPS23758RJJR part is unused and in its original packaging.
Return procedure for TPS23758RJJR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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