© Semiconductor Components Industries, LLC, 2013
May, 2013 − Rev. 3
1 Publication Order Number:
NCP1083/D
NCP1083
Integrated High Power
PoE-PD Interface & DC-DC
Converter Controller with
9V Auxiliary Supply Support
Introduction
The NCP1083 is a member of ON Semiconductor’s high power
HIPO Power over Ethernet Powered Device (PoE−PD) product family
and represents a robust, flexible and highly integrated solution
targeting demanding medium and high power Ethernet applications. It
combines in a single unit an enhanced PoE−PD interface supporting
the IEEE 802.3af and the 802.3at standard and a flexible and
configurable DC−DC converter controller.
The NCP1083’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 NCP1083 to deliver up to 25.5 W for the
IEEE 802.3at standard and up to 40 W for proprietary high power PoE
applications. The NCP1083 enables the IEEE 802.3at and implements
a two event physical layer classification. Additional proprietary
classification procedures support high power power sourcing
equipment (PSE) on the market. The unique high power features
leverage the significant cost advantages of PoE− enabled systems to a
much broader spectrum of products in emerging markets such as
industrial ethernet devices, PTZ and Dome IP cameras, RFID readers,
MIMO WLAN access points, high−end VoIP phones, notebooks, 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 NCP1083 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 NCP1083 complements ON Semiconductor’s ASSP
portfolio in industrial devices and can be combined with
stepper motor drivers, CAN bus drivers and other high−
voltage interfacing devices to offer complete solutions to the
industrial and security market.
Features
• These are Pb−Free Devices
Powered Device Interface
• Flexible Auxiliary Power Supply Support
• 9 V Front, Rear and Direct Auxiliary Supply Connections
• Supporting the IEEE 802.3af and the 802.3at Standard
• Supports IEEE 802.3at Two Event Layer 1
Classification
• High Power Layer 1 Classification Indicator
• Extended Power Ranges up to 40 W
• Programmable Classification Current
• Adjustable Under Voltage Lock Out
• Programmable Inrush Current Limit
• Programmable Operational Current Limit up to
1100 mA for Extended Power Ranges
• Over−temperature Protection
• Industrial Temperature Range −40°C to 85°C with Full
Operation up to 150°C Junction Temperature
• 0.6 W 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
NCP1083 = 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
