Datasheet > TPS23730

TPS23730

更新时间： 2024-11-16 02:52:11

品牌	Logo	应用领域
德州仪器 - TI		光电二极管
页数	文件大小	规格书
53页	2285K
描述
TPS23731 IEEE 802.3bt Type 3 Class 1-4 PoE PD with No-Opto Flyback DC-DC Controller

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TPS23730 数据手册

TPS23731

_{SLVSER7 – OC}T_TOP_BS_E2_R3₂7₀3₂1₀

SLVSER7 – OCTOBER 2020

www.ti.com

TPS23731 IEEE 802.3bt Type 3 Class 1-4 PoE PD with No-Opto Flyback DC-DC

Controller

1 Features

3 Description

•

Complete IEEE 802.3bt Type 3 (Class 1-4) and

802.3at PoE PD Solution

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

standards for applications needing up to 25.5 W or

less at PD input.

– 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

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.

±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

The soft-stop feature minimizes stress on switching

sync FET(s), allowing FET BOM cost reduction.

– 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

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.

•

Primary adapter priority input

–40°C to 125°C junction temperature range

2 Applications

The DC-DC controller features slope compensation

and blanking. Typical switching frequency is 250 kHz.

•

Video and VoIP Telephones

Access Points

Security Cameras

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.

Redundant Power Feeds or Power Sharing

Device Information ⁽¹⁾

PART NUMBER

PACKAGE

BODY SIZE (NOM)

TPS23731

VSON (45)

7.00 mm × 5.00 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

TPS23731

V_CC

R_CLC_CL

VDD

DEN

C_BULK

D_CL

V_OUT2

C_OUT2

R_DEN

APDO

T2P

GATE

0.1 ꢀF

58V

CLS

R_CS

V_OUT1

VCC

C_OUT

COMP

D_CC

VSS

APD

C_COMP

R_COMP

I_in

R₁

C_VCC

C_CC2

LINEUV

FRS

R_UV2

D_A

R₂

SST

C_SST

R_DTR

EA_DIS

DTHR

RTN GND I_STP PSRS

C_VB

R_APD2

C_DTR

R_FRS

48V

Adapter

R_{I_STP}

Simplified Application

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

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Product Folder Links: TPS23731

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与TPS23730相关器件

型号	品牌	获取价格	描述	数据表
TPS23730RMTR	TI	获取价格	TPS23730 IEEE 802.3bt Type 3 PoE PD with High Efficiency DC-DC Controller
TPS23730RMTT	TI	获取价格	TPS23730 IEEE 802.3bt Type 3 PoE PD with High Efficiency DC-DC Controller
TPS23731	TI	获取价格	TPS23731 IEEE 802.3bt Type 3 Class 1-4 PoE PD with No-Opto Flyback DC-DC Controller
TPS23731RMTR	TI	获取价格	TPS23731 IEEE 802.3bt Type 3 Class 1-4 PoE PD with No-Opto Flyback DC-DC Controller
TPS2373-3RGWR	TI	获取价格	具有高级启动功能的 IEEE 802.3bt PoE 高功率 PD 接口 \| RGW \|
TPS2373-3RGWT	TI	获取价格	具有高级启动功能的 IEEE 802.3bt PoE 高功率 PD 接口 \| RGW \|
TPS23734	TI	获取价格	TPS23731 IEEE 802.3bt Type 3 Class 1-4 PoE PD with No-Opto Flyback DC-DC Controller
TPS2373-4RGWR	TI	获取价格	具有高级启动功能的 IEEE 802.3bt PoE 高功率 PD 接口 \| RGW \|
TPS2373-4RGWT	TI	获取价格	具有高级启动功能的 IEEE 802.3bt PoE 高功率 PD 接口 \| RGW \|
TPS23734RMTR	TI	获取价格	TPS23734 IEEE 802.3bt Type 3 Class 1-4 PoE PD with High Efficiency DC-DC Controller

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