Datasheet > PM8801

PM8801

更新时间： 2024-09-26 01:19:07

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		/
页数	文件大小	规格书
37页	1585K
描述
Programmable classification current

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PM8801 数据手册

PM8801

High-efficiency, IEEE 802.3at compliant, integrated PoE-PD

interface and PWM controller

Datasheet

production data

Description

The PM8801 integrates a standard compliant

Power over Ethernet (PoE) interface and a

current mode PWM controller to simplify the

design of the power supply sections of all

powered devices.

HTSSOP24

The PoE/PoE+ interface incorporates all the

functions required by the IEEE 802.3at including

detection, classification, undervoltage lockout

(UVLO) and inrush current limitation.

Features

• IEEE 802.3at compliant PD interface

• Works with power supplied from Ethernet LAN

The PM8801 specifically performs IEEE802.3at

Layer1 hardware classification, providing an

indication of type 2 PSE successful detection to

the rest of the system.

cables or from local auxiliary sources

• Successful IEEE802.3at Layer1 classification

indicator

The PM8801 has been designed to work with

power either from the Ethernet cable connection

or from an external power source such as a wall

adapter, ensuring prevalence of the auxiliary

source with respect to the PoE interface.

• Integrated 100 V, 0.45 Ω, 1 A hot-swap

MOSFET

• Accurate 140 mA typ. inrush current level

• Programmable classification current

• Sleep mode with LED indicator and Maintain

The DC/DC section of the PM8801 features a

programmable oscillator frequency, an adjustable

slope compensation, dual complementary low-

side drivers with programmable delay time and

internal temperature sensor.

Power Signature (MPS)

• Precise DC current limit set at 640 mA typ.

• Integrated high-voltage startup bias regulator

• Thermal shutdown protection

The PM8801 targets high-efficiency conversion at

all load conditions supporting flyback, forward,

forward active clamp and synchronous

rectification.

• Current mode pulse width modulator

• Programmable oscillator frequency

• 80% maximum duty cycle with internal slope

compensation

Table 1. Device summary

• Support for flyback, forward, forward active

clamp, flyback with synchronous rectification

Part number

Package

Packing

PM8801

Tube

Applications

HTSSOP24

PM8801TR

Tape and reel

• VoIP phones, WLAN AP

• WiMAX CPEs

• Security cameras

• PoE/PoE+ Powered device appliances

July 2013

DocID018560 Rev 2

1/37

This is information on a product in full production.

www.st.com

12 3 4 5 6 7...37

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与PM8801相关器件

型号	品牌	获取价格	描述	数据表
PM8801TR	STMICROELECTRONICS	获取价格	Programmable classification current
PM8803	STMICROELECTRONICS	获取价格	High-efficiency, IEEE 802.3at compliant integrated PoE-PD interface and PWM controller
PM8803TR	STMICROELECTRONICS	获取价格	High-efficiency, IEEE 802.3at compliant integrated PoE-PD interface and PWM controller
PM8804	STMICROELECTRONICS	获取价格	PoE和电信系统的PWM峰值电流模式控制器
PM8805	STMICROELECTRONICS	获取价格	具有嵌入式双有源桥的IEEE 802.3bt PoE-PD接口
PM881	ETC	获取价格	Analog IC
PM882	ETC	获取价格	Analog IC
PM8834	STMICROELECTRONICS	获取价格	4 A dual low side MOSFET driver
PM8834MTR	STMICROELECTRONICS	获取价格	4 A双低侧MOSFET驱动器
PM8834Q	STMICROELECTRONICS	获取价格	4 A dual low side MOSFET driver

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