© Semiconductor Components Industries, LLC, 2013
May, 2013 − Rev. 3
1 Publication Order Number:
NCP1082/D
NCP1082
Integrated PoE-PD & DC-DC
Converter Controller with
9V Auxiliary Supply Support
Introduction
The NCP1082 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 IEEE 802.3af specification and
a flexible and configurable DC−DC converter controller.
The NCP1082’s exceptional capabilities enable applications to
smoothly transition from non−PoE to PoE enabled networks by also
supporting power from auxiliary sources such as AC power adapters
and battery supplies, eliminating the need for a second switching
power supply.
ON Semiconductor’s unique manufacturing process and design
enhancements allow the NCP1082 to deliver up to 13 W of regulated
power to support PoE applications according to the IEEE 802.3af
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 points, 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 NCP1082 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 NCP1082 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
• This is a Pb−Free Device
Powered Device Interface
• Flexible Auxiliary Power Supply Support
• 9 V Front, Rear and Direct Auxiliary Supply
Connections
• Fully Supports IEEE 802.3af Standard
• Regulated Power Output up to 13 W
• Programmable Classification Current
• Adjustable Under Voltage Lock Out
• Programmable Inrush Current Limit
• Programmable Operational Current Limit up to 500 mA
• Over−temperature Protection
• Industrial Temperature Range −40°C to 85°C with Full
Operation up to 150°C Junction Temperature
• 0.6 Ohm Hot−swap Pass−switch with Low Loss
Current Sense Technique
• Vertical N−channel DMOS Pass−switch Offers the
Robustness of Discrete MOSFETs with Integrated
Temperature Control
http://onsemi.com
NCP1082 = 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
1
