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NCP1081 Series 57 V 40 W Power over Ethernet (PoE-PD) DC-DC Converter-TSSOP-20EP

Product Specification Section
Caractéristiques techniques
Attributes Table
Type: PoE-PD
Supply Voltage: 0V to 57V
Supply Current: 1100mA
Operating Temp Range: -40°C to +85°C
Storage Temperature Range: -55°C to +150°C
Style d'emballage :  TSSOP-20EP
Méthode de montage : Surface Mount
Fonctionnalités et applications

The NCP1081 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 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 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 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 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 high−voltage interfacing devices to offer complete solutions to the industrial and security market.

Key Features:

  • 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
    • 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 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
  • DC−DC Converter Controller
    • Current mode control
    • Supports isolated and non−isolated DC−DC converter applications
    • Internal voltage regulators
    • Wide duty cycle range with internal slope compensation circuitry
    • Programmable oscillator frequency
    • Programmable soft−start time


  • Power over Ethernet Powered Device (PoE-PD) interface and Integrated DC-DC converter controller

End Products:

  • MIMO WLAN access points
  • PTZ and dome security cameras
  • Industrial Ethernet HMIs and UPS backed PLCs and IOMs
  • Point of Sales terminals
  • RFID readers
  • Notebook computers


Pricing Section
5 000
Commande minimale :
2 500
Multiples de :
2 500
Sur commande :
Stock d'usine :Stock d'usine :
32 500
Délai d'usine :
24 Semaines
3 975,00 $
Prix Internet
2 500
5 000+