TPS23731

Name: TPS23731
Brand: TI
SKU: TPS23731
Price: 1.011 USD

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PD de PoE IEEE 802.3bt, tipo 3, clase 1-4, con controlador CC-CC sin retorno de opto

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document-pdfAcrobat TPS23731 IEEE 802.3bt Type 3 Class 1-4 PoE PD with No-Opto Flyback DC-DC Controller datasheet (Inglés) PDF | HTML

TPS23731

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Detalles del producto

Vin (min) (V)

10.2

Vin (max) (V)

60

PoE current limit (min) (mA)

750

PoE inrush limit (mA) (typ) (A)

0.14

rDS(on) per FET (typ) (mΩ)

300

PoE standards supported

802.3at Type 1 (802.3af), 802.3at Type 2, 802.3bt Type 3

PD power level

13W, 25W

DC/DC control

PD and DC/DC

Fault response

Auto Retry

Features

Adapter priority, Advanced startup, Automatic MPS, Error amplifier, Inrush delay, Primary-side adapter priority, Primary-side regulation, Spread-spectrum frequency dithering, Thermal shutdown

Operating temperature range (°C)

-40 to 125

Rating

Catalog

Vin (min) (V)

10.2

Vin (max) (V)

60

PoE current limit (min) (mA)

750

PoE inrush limit (mA) (typ) (A)

0.14

rDS(on) per FET (typ) (mΩ)

300

PoE standards supported

802.3at Type 1 (802.3af), 802.3at Type 2, 802.3bt Type 3

PD power level

13W, 25W

DC/DC control

PD and DC/DC

Fault response

Auto Retry

Features

Adapter priority, Advanced startup, Automatic MPS, Error amplifier, Inrush delay, Primary-side adapter priority, Primary-side regulation, Spread-spectrum frequency dithering, Thermal shutdown

Operating temperature range (°C)

-40 to 125

Rating

Catalog

VQFN (RMT)

45

35 mm² 7 x 5

Complete IEEE 802.3bt Type 3 (Class 1-4) and 802.3at PoE PD Solution
- EA Gen 2 logo-ready (PoE 2 PD Controller)
- Robust 100-V, 0.3-Ω (typ) Hotswap MOSFET
- Supports power levels for up to 30-W operation
Integrated PWM controller for flyback configuration
- Flyback control with primary-side regulation
  - Supports CCM operation
  - ±1.5% (typ, 5-V output) load regulation (0-100% load range) — with Sync FET
  - ±3% (typ, 12-V output) load regulation (5-100% load range) — diode rectified
- Also supports secondary-side regulation
- Soft-start control with advanced startup and hiccup mode overload protection
- Soft-stop shutdown
- Adjustable frequency with synchronization
- Programmable frequency dithering for EMI
Automatic Maintain Power Signature (MPS)
- Auto-adjust to PSE type and load current with auto-stretch
Primary adapter priority input
–40°C to 125°C junction temperature range

Complete IEEE 802.3bt Type 3 (Class 1-4) and 802.3at PoE PD Solution
- EA Gen 2 logo-ready (PoE 2 PD Controller)
- Robust 100-V, 0.3-Ω (typ) Hotswap MOSFET
- Supports power levels for up to 30-W operation
Integrated PWM controller for flyback configuration
- Flyback control with primary-side regulation
  - Supports CCM operation
  - ±1.5% (typ, 5-V output) load regulation (0-100% load range) — with Sync FET
  - ±3% (typ, 12-V output) load regulation (5-100% load range) — diode rectified
- Also supports secondary-side regulation
- Soft-start control with advanced startup and hiccup mode overload protection
- Soft-stop shutdown
- Adjustable frequency with synchronization
- Programmable frequency dithering for EMI
Automatic Maintain Power Signature (MPS)
- Auto-adjust to PSE type and load current with auto-stretch
Primary adapter priority input
–40°C to 125°C junction temperature range

The TPS23731 device combines a Power over Ethernet (PoE) powered device (PD) interface, and a current-mode DC-DC controller optimized for flyback switching regulator designs where the use of primary-side regulation (PSR) is supported. The PoE interface supports the IEEE 802.3bt and IEEE 802.3at standard s for applications needing up to 25.5 W or less at PD input.

Programmable spread spectrum frequency dithering (SSFD) is provided to minimize the size and cost of EMI filter. Advanced Startup with adjustable soft-start helps to use minimal bias capacitor while simplifying converter startup and hiccup design, also ensuring that IEEE 802.3bt /at startup requirements are met.

The soft-stop feature minimizes stress on switching sync FET(s), allowing FET BOM cost reduction.

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 continuous conduction mode (CCM), and can work with secondary side synchronous rectification, resulting in optimum efficiency, regulation accuracy and step load response over multiple outputs.

The DC-DC controller features slope compensation and blanking. Typical switching frequency is 250 kHz.

The automatic MPS enables applications with low power modes or multiple power feeds. It automatically adjusts its pulsed current amplitude and duration according to PSE Type and system conditions, to maintain power while minimizing consumption.

The TPS23731 device combines a Power over Ethernet (PoE) powered device (PD) interface, and a current-mode DC-DC controller optimized for flyback switching regulator designs where the use of primary-side regulation (PSR) is supported. The PoE interface supports the IEEE 802.3bt and IEEE 802.3at standard s for applications needing up to 25.5 W or less at PD input.

Programmable spread spectrum frequency dithering (SSFD) is provided to minimize the size and cost of EMI filter. Advanced Startup with adjustable soft-start helps to use minimal bias capacitor while simplifying converter startup and hiccup design, also ensuring that IEEE 802.3bt /at startup requirements are met.

The soft-stop feature minimizes stress on switching sync FET(s), allowing FET BOM cost reduction.

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 continuous conduction mode (CCM), and can work with secondary side synchronous rectification, resulting in optimum efficiency, regulation accuracy and step load response over multiple outputs.

The DC-DC controller features slope compensation and blanking. Typical switching frequency is 250 kHz.

The automatic MPS enables applications with low power modes or multiple power feeds. It automatically adjusts its pulsed current amplitude and duration according to PSE Type and system conditions, to maintain power while minimizing consumption.

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Documentación técnica

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	Tipo	Título		Fecha
*	Data sheet	TPS23731 IEEE 802.3bt Type 3 Class 1-4 PoE PD with No-Opto Flyback DC-DC Controller datasheet	PDF \| HTML	02 oct 2020
	EVM User's guide	TPS23731EVM-095 Evaluation Module (Rev. A)	PDF \| HTML	02 ago 2023
	Application note	PoE Powered Devices Debug Guidelines	PDF \| HTML	19 jul 2021
	Application note	PoE PD Schematic Review Guidelines	PDF \| HTML	29 abr 2021
	Certificate	TPS23731EVM-095 EU RoHs Declaration of Conformity (DoC)		13 nov 2020
	Application note	Soft-Stop: TPS2373X Feature Explanation	PDF \| HTML	27 oct 2020

Diseño y desarrollo

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Placa de evaluación

TPS23731EVM-095 — Módulo de evaluación TPS23731 para aplicaciones PD de PoE IEEE802.3bt tipo 3, clase 4

The TPS23731 evaluation module (TPS23731EVM-095) contains evaluation and reference circuitry for the TPS23731, which is a IEEE802.3bt Type 3 Class 4 PoE PD controller suitable for Class 4 (25.5W) PoE PD applications.

Guía del usuario: PDF | HTML

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Test report: PDF

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VQFN (RMT)	45	Ver opciones

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TPS23731

PD de PoE IEEE 802.3bt, tipo 3, clase 1-4, con controlador CC-CC sin retorno de opto

TPS23731

Detalles del producto

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Documentación técnica

Diseño y desarrollo

TPS23731EVM-095 — Módulo de evaluación TPS23731 para aplicaciones PD de PoE IEEE802.3bt tipo 3, clase 4

PSPICE-FOR-TI — PSpice® para herramienta de diseño y simulación de TI

PMP22806 — Diseño de referencia de regulación del lado primario del convertidor aislado de retorno PoE PD de cl

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