NCP1081 Datasheet, PDF (1/17 Pages) ON Semiconductor – Integrated High Power PoE-PD Interface & DC-DC Converter Controller

NCP1081
Integrated High Power
PoE-PD Interface & DC-DC
Converter Controller
Introduction
The NCP1081 is a member of ON Semiconductor’s high power
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HIPOt 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 IEEE802.3af and the upcoming draft IEEE802.3at (D3.0) standard
and a flexible and configurable DC−DC converter controller.
The NCP1081’s exceptional capabilities offer new opportunities for
TSSOP−20 EP
DE SUFFIX
CASE 948AB
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 NCP1081 to deliver up to 25.5 W for the draft
IEEE802.3at (D3.0) standard and up to 40 W for proprietary high
power PoE applications. The NCP1081 enables the draft IEEE802.3at
(D3.0) 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
NCP1081 = Specific Device Code
XXXX = Date Code
Y
= Assembly Location
ZZ = Traceability Code
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 NCP1081 is fabricated in a robust high voltage
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.
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 NCP1081 complements ON Semiconductor’s ASSP
portfolio in industrial devices and can be combined with
stepper motor drivers, CAN bus drivers and other
• 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
high−voltage interfacing devices to offer complete solutions
to the industrial and security market.
for extended power ranges
• Over−temperature protection
Powered Device Interface
• Supporting the IEEE802.3af and the upcoming draft
IEEE802.3at (D3.0) standard
• Supports draft IEEE802.3at (D3.0) Two Event Layer 1
classification
• High power Layer 1 classification indicator
• 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
© Semiconductor Components Industries, LLC, 2008
1
September, 2008 − Rev. 4
Publication Order Number:
NCP1081/D