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  ON Semiconductor Electronic Components Datasheet  

NCP1082 Datasheet

Integrated PoE-PD & DC-DC Converter Controller

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NCP1082
Integrated PoE-PD & DC-DC
Converter Controller with
9 V Auxiliary Supply Support
Introduction
The NCP1082 is a member of ON Semiconductor’s Power over
Ethernet Powered Device (PoEPD) product family and represents a
robust, flexible and highly integrated solution targeting demanding
Ethernet applications. It combines in a single unit an enhanced
PoEPD interface fully supporting the IEEE 802.3af specification and
a flexible and configurable DCDC converter controller.
The NCP1082’s exceptional capabilities enable applications to
smoothly transition from nonPoE 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
PoEenabled 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 DCDC controller facilitates isolated
and nonisolated flyback, 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 startup.
The NCP1082 is fabricated in a robust high voltage 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 NCP1082 complements ON Semiconductor’s ASSP portfolio
in communications and industrial devices and can be combined with
other highvoltage interfacing devices to offer complete solutions to
the communication, industrial and security markets.
http://onsemi.com
1
TSSOP20 EP
DE SUFFIX
CASE 948AB
NCP1082 = Specific Device Code
XXXX = Date Code
Y = Assembly Location
ZZ = Traceability Code
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.
Features
This is a PbFree 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
Overtemperature Protection
Industrial Temperature Range 40°C to 85°C with Full
Operation up to 150°C Junction Temperature
0.6 Ohm 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. 3
1
Publication Order Number:
NCP1082/D


  ON Semiconductor Electronic Components Datasheet  

NCP1082 Datasheet

Integrated PoE-PD & DC-DC Converter Controller

No Preview Available !

NCP1082
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
AUX
TEST
PIN DIAGRAM
1
Exposed
Pad
SS
FB
COMP
VDDL
VDDH
GATE
ARTN
NC
CS
OSC
ORDERING INFORMATION
Part Number
Temperature Range
Package
(Top View)
Shipping Configuration
NCP1082DEG
40°C to 85°C
TSSOP20 EP
(PbFree)
74 units / Tube
NCP1082DER2G
40°C to 85°C
TSSOP20 EP
(PbFree)
2500 / Tape & Reel
†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
AUX
DETECTION
AUXILIARY
SUPPLY
DETECTION
INTERNAL
SUPPLY
&
BANDGAP
CLASS
CLASSIFICATION
UVLO
UVLO
VPORT
MONITOR
INRUSH
ILIM1
INRUSH
ILIM1
HOT SWAP SWITCH
CONTROL & CURRENT
LIMIT BLOCKS
THERMAL
SHUT
DOWN
VDDH
VDDL
VDDH
VDDL
VDDL
VDDL
5 mA
DCDC
CONVERTER
CONTROL
VDDL
5 K 1.2 V
OSC
VDDH
SS
FB
COMP
CS
OSC
GATE
NC
VPORTN1,2
ARTN
RTN
Figure 1. NCP1082 Block Diagram
http://onsemi.com
2


Part Number NCP1082
Description Integrated PoE-PD & DC-DC Converter Controller
Maker ON Semiconductor
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NCP1082 Datasheet PDF






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