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  ON Semiconductor Electronic Components Datasheet  

NCP1081 Datasheet

Integrated High Power PoE-PD Interface & DC-DC Converter Controller

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NCP1081
Integrated High Power
PoE-PD Interface & DC-DC
Converter Controller
Introduction
The NCP1081 is a member of ON Semiconductor’s high power
http://onsemi.com
HIPO Power over Ethernet Powered Device (PoEPD) 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 PoEPD interface supporting
the IEEE802.3af and the 802.3at standard and a flexible and
1
configurable DCDC converter controller.
The NCP1081’s exceptional capabilities offer new opportunities for
the design of products powered directly over Ethernet lines,
TSSOP20 EP
DE SUFFIX
CASE 948AB
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
IEEE802.3at standard and up to 40 W for proprietary high power PoE
applications. The NCP1081 enables the IEEE802.3at 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 PoEenabled 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 DCDC controller facilitates isolated
and nonisolated flyback, forward and buck converter topologies. It
NCP1081 = Specific Device Code
XXXX = Date Code
Y = Assembly Location
ZZ = Traceability Code
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 startup.
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 Nchannel 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 high
voltage interfacing devices to offer complete solutions to the
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
industrial and security market.
Overtemperature Protection
Features
These are PbFree Devices
Powered Device Interface
Supporting the IEEE802.3af and the 802.3at Standard
Supports IEEE802.3at 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 W Hotswap Passswitch with Low Loss Current
Sense Technique
Vertical Nchannel DMOS Passswitch offers the
Robustness of Discrete MOSFETs with Integrated
Temperature Control
© Semiconductor Components Industries, LLC, 2013
May, 2013 Rev. 7
1
Publication Order Number:
NCP1081/D


  ON Semiconductor Electronic Components Datasheet  

NCP1081 Datasheet

Integrated High Power PoE-PD Interface & DC-DC Converter Controller

No Preview Available !

NCP1081
DCDC Converter Controller
Current Mode Control
Supports Isolated and Nonisolated DCDC Converter
Applications
Internal Voltage Regulators
Wide Duty Cycle Range with Internal Slope
Compensation Circuitry
Programmable Oscillator Frequency
Programmable Softstart Time
VPORTP
CLASS
UVLO
INRUSH
ILIM1
VPORTN1
RTN
VPORTN2
TEST1
TEST2
PIN DIAGRAM
1
Exposed
Pad
SS
FB
COMP
VDDL
VDDH
GATE
ARTN
nCLASS_AT
CS
OSC
ORDERING INFORMATION
Part Number
Package
(Top View)
Shipping Configuration
Temperature Range
NCP1081DEG
TSSOP20 EP
(PbFree)
74 units / Tube
40°C to 85°C
NCP1081DER2G
TSSOP20 EP
(PbFree)
2500 / Tape & Reel
40°C to 85°C
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specification Brochure, BRD8011/D.
VPORTP
DETECTION
INTERNAL
SUPPLY
&
BANDGAP
THERMAL
SHUT
DOWN
VDDH
VDDL
VDDH
VDDL
CLASS
UVLO
INRUSH
ILIM1
VPORTN1,2
CLASSIFICATION
UVLO
VPORT
MONITOR
INRUSH
ILIM1
HOT SWAP SWITCH
CONTROL & CURRENT
LIMIT BLOCKS
VDDL
VDDL
5 mA
DCDC
CONVERTER
CONTROL
VDDL
5 K 1.2 V
OSC
VDDH
SS
FB
COMP
CS
OSC
GATE
VDDL
20 mA
nCLASS_AT
ARTN
RTN
Figure 1. NCP1081 Block Diagram
http://onsemi.com
2


Part Number NCP1081
Description Integrated High Power PoE-PD Interface & DC-DC Converter Controller
Maker ON Semiconductor
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NCP1081 Datasheet PDF






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