PM8800 Integrated IEEE 802.3af compliant PoE-PD interface and PWM controller with support of external source

The PM8800A integrates a standard power over Ethernet (PoE) interface and a current mode PWM controller to simplify the design of the power supply sections of all powered devices.

The PoE interface incorporates all the functions required by the IEEE 802.3af including detection, classification, under-voltage lockout (UVLO) and in-rush current limitation.

PM8800A specifically targets PD with extended power requirement with respect to the limit imposed by the 802.3af standard, embedding a hot-swap MOSFET capable of sustaining twice the current of the 802.3af standard with a programmable DC current limit.

The integrated switching regulator has been designed to work with power either form the Ethernet cable connection or from an external power source such as AC adapter.

The DC-DC section of the PM8800A features a programmable oscillator frequency, soft-start, slope compensation and embeds a voltage output error amplifier allowing use in both isolated and non isolated configuration

技术特性

IEEE 802.3af compliant PD interface
Works with power supplied from Ethernet LAN cables or from local auxiliary sources
Integrated 100V, 0. 5Ω, 800mA Hot-Swap MOSFET
Integrated signature resistor
Programmable in-rush current limit
Programmable classification current
Programmable DCcurrent limit up to 800 mA
High voltage start-up bias regulator
Thermal shutdown protection
Current mode pulse width modulator
Programmable oscillator frequency
Programmable soft-start
Power good indication
80% maximum duty cycle with internal slope compensation
Supports both isolated and non-isolated applications

应用领域

VoIP phones, WLAN access points
Security cameras
PoE powered device appliances
High power (>12.95 W) powered devices

功能框图

PM8800 订购信息

订购型号	产品状态	美金价格	数量	封装	包装形式	温度范围	材料声明
PM8800ATR	Active		1000	HTSSOP20	Tape And Reel		PM8800ATR
PM8800A	Active		1000	HTSSOP20	Tube		PM8800A

DATASHEET

描述	版本	大小
PM8800 : DS5465: Integrated IEEE 802.3af compliant PoE-PD interface and PWM controller with support of external source	2	548KB

APPLICATION NOTES

描述	版本	大小
AN2783: PM8800 demonstration kit for standard and high power PoE PD interface and power supply, with auxiliary sources	2	1342KB

FLYERS

描述	版本	大小
FLPM88031010 : PM8803: Integrated PoE+ PD interface and PWM controller	1.0	217KB