© Semiconductor Components Industries, LLC, 2008

September, 2008 − Rev. 4

1

Publication Order Number:

NCP1080/D

NCP1080

Integrated PoE-PD & DC-DC

Converter Controller

Introduction

The NCP1080 is a member of ON Semiconductor’s Power over

Ethernet Powered Device (PoE−PD) product family and represents a

robust, flexible and highly integrated solution targeting demanding

Ethernet applications. It combines in a single unit an enhanced

PoE−PD interface fully supporting the IEEE802.3af specification and

a flexible and configurable DC−DC converter controller.

The NCP1080’s exceptional capabilities offer new opportunities for

the design of products powered directly over Ethernet lines,

eliminating the need for local power adaptors or power supplies and

drastically reducing the overall installation and maintenance cost.

ON Semiconductor’s unique manufacturing process and design

enhancements allow the NCP1080 to deliver up to 13 W of regulated

power to support PoE applications according to the IEEE802.3af

standard. This device leverages the significant cost advantages of

PoE−enabled systems to a broad spectrum of products in markets such

as VoIP phones, wireless LAN access point, security cameras, point of

sales terminals, RFID readers, industrial ethernet devices, etc.

The integrated current mode DC−DC controller facilitates isolated

and non−isolated fly−back, forward and buck converter topologies. It

has all the features necessary for a flexible, robust and highly efficient

design including programmable switching frequency, duty cycle up to

80 percent, slope compensation, and soft start−up.

The NCP1080 is fabricated in a robust high voltage process and

integrates a rugged vertical N−channel DMOS with a low loss current

sense technique suitable for the most demanding environments and

capable of withstanding harsh environments such as hot swap and

cable ESD events.

The NCP1080 complements ON Semiconductor’s ASSP portfolio

in communications and industrial devices and can be combined with

other high−voltage interfacing devices to offer complete solutions to

the communication, industrial and security markets.

Features

Powered Device Interface

operation up to 150

°C junction temperature

sense technique

robustness of discrete MOSFETs with integrated

temperature control

DC−DC Converter Controller

applications

compensation circuitry

http://onsemi.com

NCP1080 = Specific Device Code

XXXX = Date Code

Y

= Assembly Location

ZZ

= Traceability Code

TSSOP−20 EP

DE SUFFIX

CASE 948AB

See detailed ordering and shipping information in the package

dimensions section on page 2 of this data sheet.

ORDERING INFORMATION