Product details


Vin (Min) (V) 10.2 Vin (Max) (V) 57 PoE current limit (Min) (mA) 405 PoE inrush limit (Typ) (mA) 140 rDS(on) per FET (Typ) (mOhms) 360 PoE standards supported 802.3at Type 1 (802.3af) PD power level 13W DC/DC control PD and DC/DC Fault response Auto Retry Features Advanced startup, Error Amplifier, Integrated Switching FET, Primary Side Adapter Priority, Primary-Side Regulation, Spread Spectrum Frequency Dithering, Thermal Shutdown Switching frequency Programmable, Synchronizable open-in-new Find other Powered devices


  • Complete IEEE 802.3at PD solution for type 1 PoE
    • Ethernet Alliance (EA) logo certified designs available
    • Robust 100-V, 0.36-Ω (typ) hotswap MOSFET
  • Integrated PWM controller with 0.77-Ω (typ) 150-V power MOSFET
    • Flyback controller with PSR
      • Supports CCM operation with secondary side synchronous FET— multi-outputs
      • ±1% (typ, 5-V Output) Load regulation (0-100% load range) — with Sync FET
    • Supports low-side switch buck topology
    • Adjustable switching frequency with synchronization
    • Soft-start control with advanced startup
    • Programmable slew rate and frequency dithering for enhanced EMI reduction
  • Primary adapter priority input
  • –40°C to 125°C Junction temperature range
  • Small 6-mm x 4-mm VSON package

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The TPS23758 device combines a Power over Ethernet (PoE) powered device (PD) interface, a 150-V switching power FET, and a current-mode DC-DC controller optimized for flyback topology. The high level of integration along with primary side regulation (PSR), spread spectrum frequency dithering (SSFD), and advanced startup makes the TPS23758 an ideal solution for size-constrained applications. The PoE implementation supports the IEEE 802.3at standard as a 13-W, Type 1 PD.

The PSR feature of the DC-DC controller uses feedback from an auxiliary winding for control of the output voltage, eliminating the need for external shunt regulator and optocoupler. It is optimized for operation in continuous conduction mode (CCM) with secondary side synchronous rectification, resulting in optimum overall efficiency, regulation accuracy and step load response over multiple outputs (for example 5-V and 3.3-V output). Typically, the converter operates at a switching frequency of 250 kHz.

SFFD and slew rate control helps to minimize the size and cost of the EMI filter. Advanced Startup allows the use of minimal bias capacitor while simplifying converter startup and hiccup design.

Primary auxiliary power detect (APD) pin can be used to provide priority for a primary side power adapter.

The DC-DC controller features adjustable soft-start, slope compensation, and blanking. For non-isolated applications, the buck topology is also supported by the TPS23758.

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Same functionality but is not pin-for-pin or parametrically equivalent to the compared device:
TPS23755 ACTIVE IEEE 802.3at PoE PD with no-opto flyback DC-DC controller This product is recommended for 12V or higher output voltage applications in order to maintain output voltage regulation accuracy.

Technical documentation

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Type Title Date
* Datasheet TPS23758 IEEE 802.3at PoE PD with No-Opto Sync Flyback DC-DC Controller datasheet Dec. 14, 2016
Application note A small-footprint PoE solution for machine-vision cameras and sensors Sep. 30, 2019
User guide TPS23758EVM-080 Evaluation Module (Rev. A) Jul. 29, 2019
Technical articles How to reduce the size of your 13-W PoE PD solution Jun. 25, 2019

Design & development

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Hardware development

The TPS23758 evaluation module (TPS23758EVM-080) contains evaluation and reference circuitry for the TPS23758, which is a IEEE802.3at Type 1 PoE PD controller suitable for Type 1 (13W) PoE PD applications.
  • IEEE802.3at Type 1 compliant PoE PD
  • Primary Side Regulated 5V High Efficiency CCM Flyback
  • Programmable Slew Rate and Frequency Dithering for EMI Reduction
  • Primary side adapter priority control
  • Integrated Primary FET

Design tools & simulation

PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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SLVC777.ZIP (643 KB)

Reference designs

High density isolated PoE and GigE reference design for machine vision cameras and vision sensors
TIDA-010083 — Power over Ethernet (PoE) offers an easy and reliable solution to combine power and data in one cable with high data rate and long reach. This combination makes PoE ideal for small devices such as machine vision cameras and vision sensors. This reference design implements a complete PoE powered (...)
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